[Bug 719416] New: writing to usb flashdisk uses too much cpu and makes system unresponsive

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bugzilla_noreply＠novell.com

21 Sep 2011 21 Sep '11

09:56

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c0 Summary: writing to usb flashdisk uses too much cpu and makes system unresponsive Classification: openSUSE Product: openSUSE 12.1 Version: Milestone 5 Platform: x86-64 OS/Version: SuSE Other Status: NEW Severity: Major Priority: P5 - None Component: Basesystem AssignedTo: bnc-team-screening@forge.provo.novell.com ReportedBy: diego.ercolani@gmail.com QAContact: qa@suse.de Found By: --- Blocker: --- User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:6.0) Gecko/20100101 Firefox/6.0 This is an annoying bug: I have a system capable of heavy cpuload (AMD Phenom(tm) II X4 980 Processor with 8GB of ram) but If I try to copy huge files to flashdisk (usb pen) I notice a quick uprising of system load (over 3) and usage of cpu (over 60%) The annoying thing (also usage of system resource isn't too good) is that while system is copying files (1GB each), it becames unusable and irresponsive for a while (20 seconds) from time to time. Probably this is due to the "flush procedure" that from time to time is going to sync the filesystem on the flash device. But... how about the io/scheduler ? Reproducible: Always Steps to Reproduce: 1. having 3 files of 1 GB each 2. from terminal: copy 1.sample 2.sample 3.sample /media/FLASHDISK 3. use desktop, browse internet, etc. while copying -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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bugzilla_noreply＠novell.com

24 Sep 24 Sep

14:46

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c zj jia changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |zjjia@suse.com AssignedTo|bnc-team-screening@forge.pr |kernel-maintainers@forge.pr |ovo.novell.com |ovo.novell.com -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

19 Oct 19 Oct

11:08

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c1 Ismail Donmez changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |idonmez@suse.com Component|Basesystem |Kernel Version|Milestone 5 |Beta 1 --- Comment #1 from Ismail Donmez 2011-10-19 11:08:40 UTC --- I can reproduce this. Assigning to kernel people. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

20 Oct 20 Oct

14:40

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c2 --- Comment #2 from Ismail Donmez 2011-10-20 14:40:38 UTC --- I can't reproduce with kernel-vanilla so it must be something in our local patches. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

29 Nov 29 Nov

19:00

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c3 Bernhard Wiedemann changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |bwiedemann@suse.com, | |jack@suse.com --- Comment #3 from Bernhard Wiedemann 2011-11-29 20:00:37 CET --- I think, this is https://lkml.org/lkml/2011/11/10/173 I triggered it by writing a 3GB raw image to USB (/dev/sdb) and at the same time, I ran a test program, that did malloc 8MB chunks The thread also mentions NUMA and transparent hugepages both of which appear to be active for me. Here is my test program to trigger bug --- malloc.c --- // make malloc && time bash -c "for i in \$(seq 1 50 ) ; do strace ./malloc ; done" // takes 0.3 seconds total here when not hanging #include main() { malloc(8*1024*1024); } -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

19:03

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c4 --- Comment #4 from Bernhard Wiedemann 2011-11-29 20:03:12 CET --- Created an attachment (id=464635) --> (http://bugzilla.novell.com/attachment.cgi?id=464635) kernel log with blocking tasks notice the malloc trace also occurs in there -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

19:13

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c5 Bernhard Wiedemann changed: What |Removed |Added ---------------------------------------------------------------------------- Version|Beta 1 |Final --- Comment #5 from Bernhard Wiedemann 2011-11-29 20:13:50 CET --- workaround: echo madvise > /sys/kernel/mm/transparent_hugepage/enabled forgot to mention that this also occurs on 3.2.0-rc3-2-default in addition to 3.1.0-default didn't try vanilla, yet -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

30 Nov 30 Nov

11:48

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c6 Jan Kara changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mgorman@suse.com, | |mhocko@suse.com --- Comment #6 from Jan Kara 2011-11-30 11:47:59 UTC --- Mel, I think this is for you since you are solving THP stalls upstream anyway... -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

12:31

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c7 --- Comment #7 from Mel Gorman 2011-11-30 12:31:17 UTC --- Still working on it(In reply to comment #6)

...

Mel, I think this is for you since you are solving THP stalls upstream anyway...

Still working on it. I'm hoping to have a series out later in the week. I'll post a reference here to the patches when I do. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

2 Dec 2 Dec

14:59

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c8 --- Comment #8 from Mel Gorman 2011-12-02 14:59:11 UTC --- (In reply to comment #7)

...

Still working on it(In reply to comment #6)

...
Mel, I think this is for you since you are solving THP stalls upstream anyway...

Still working on it. I'm hoping to have a series out later in the week. I'll post a reference here to the patches when I do.

Patches were posted to the usual lists as you can see here https://lkml.org/lkml/2011/12/1/293 . I also placed the patches on http://www.csn.ul.ie/~mel/postings/thpstall-20111202/ . It would be much appreciated if they could be tested and either reported here on Bugzilla or on the lists. Thanks. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

7 Dec 7 Dec

03:42

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c9 Mark Fairbairn changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mrkfbrn@yahoo.co.nz --- Comment #9 from Mark Fairbairn 2011-12-07 03:42:49 UTC --- I too see this. In addition the writing speed to the usb stick varies greatly when compared to the write speed in Opensuse 11.4. When transferring a video file over usb speeds vary between 4mb down to around 10kb and sometimes stop altogether for a few seconds. In 11.4 using same usb sticks a consistent write speed of approx 8 - 9 mb was achieved. System is unresponsive (unable to launch any apps) until approx 20 seconds after write to usb stick has completed. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

10:47

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c10 --- Comment #10 from Mel Gorman 2011-12-07 10:47:16 UTC --- (In reply to comment #9)

...

I too see this. In addition the writing speed to the usb stick varies greatly when compared to the write speed in Opensuse 11.4. When transferring a video file over usb speeds vary between 4mb down to around 10kb and sometimes stop altogether for a few seconds.

Noted

...

System is unresponsive (unable to launch any apps) until approx 20 seconds after write to usb stick has completed.

Can you test the patches linked on comment 9 please? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

9 Dec 9 Dec

16:35

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c11 --- Comment #11 from Bernhard Wiedemann 2011-12-09 17:35:51 CET --- For easier testing, I made a kernel-vanilla-3.2-rc4 rpm with the patches from comment 8 added: http://download.opensuse.org/repositories/home:/bmwiedemann:/branches:/Kerne... -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

10 Dec 10 Dec

04:19

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c12 --- Comment #12 from Mark Fairbairn 2011-12-10 04:19:45 UTC --- Have done a little testing with your patched vanilla kernel. System has gained its responsive during transfers to USB stick. Transfer speeds have also somewhat improved - although are still roughly 20% - 50% slower than speeds achieved with stock opensuse kernel in OS 11.4 (depending on usb stick used). In the little testing I have done though - speeds have never fallen to the ridiculous levels achieved with the stock Opensuse 12.1 kernel (ie. between 0 and 1 mb) -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

12 Dec 12 Dec

11:44

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c13 --- Comment #13 from Mel Gorman 2011-12-12 11:44:41 UTC --- (In reply to comment #12)

...

Have done a little testing with your patched vanilla kernel. System has gained its responsive during transfers to USB stick.

Thanks for reporting.

...

Transfer speeds have also somewhat improved - although are still roughly 20% - 50% slower than speeds achieved with stock opensuse kernel in OS 11.4 (depending on usb stick used).

Ok, that is interesting. I do not have an explanation for it at the moment but when the stall issues get ironed out, I'll try find the time to investigate - no promises though. Writeback speeds to USB are not high on my priority list unfortunately.

...

In the little testing I have done though - speeds have never fallen to the ridiculous levels achieved with the stock Opensuse 12.1 kernel (ie. between 0 and 1 mb)

The patches have stalled upstream due to lack of review but I'll get a fix pushed eventually which should worm its way via stable to opensuse. However, I would expect that the fix would only be present in 3.2-stable. If openSUSE 12.x stays on 3.1 for a long time it could be a problem as pushing all the necessary patches to 3.1-stable will be a tough sell. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

5 Jan 5 Jan

09:40

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c14 --- Comment #14 from Diego Ercolani 2012-01-05 09:40:44 UTC --- for another valutation in my kernel (kernel-desktop-3.1.0-1.2.1.x86_64) while I was copying on a SD flash disk about 5GB of data these kernel messages have been emerged in the log: [ 3373.646418] sd 9:0:0:0: [sdc] 15659008 512-byte logical blocks: (8.01 GB/7.46 GiB) [ 3373.648413] sd 9:0:0:0: [sdc] No Caching mode page present [ 3373.648416] sd 9:0:0:0: [sdc] Assuming drive cache: write through [ 3373.650922] sd 9:0:0:0: [sdc] No Caching mode page present [ 3373.650924] sd 9:0:0:0: [sdc] Assuming drive cache: write through [ 3373.654562] sdc: sdc1 [ 4321.489095] INFO: task virtuoso-t:5180 blocked for more than 480 seconds. [ 4321.489097] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 4321.489099] virtuoso-t D 0000000000000000 0 5180 4947 0x00000000 [ 4321.489102] ffff8801c66d78a8 0000000000000082 ffff880199182910 ffff8801c66d7fd8 [ 4321.489104] 0000000000000001 ffff8801c66d7fd8 ffff8801c66d7fd8 ffff8801c66d7fd8 [ 4321.489107] ffff88021020c380 ffff8801ccb7e200 ffffffff81009485 ffff88021fc92d40 [ 4321.489109] Call Trace: [ 4321.489119] [<ffffffff8159a19a>] io_schedule+0x8a/0xd0 [ 4321.489124] [<ffffffff810f5ae9>] sleep_on_page+0x9/0x10 [ 4321.489127] [<ffffffff8159a9ff>] __wait_on_bit+0x4f/0x80 [ 4321.489130] [<ffffffff810f5c1f>] wait_on_page_bit+0x6f/0x80 [ 4321.489133] [<ffffffff811095d5>] shrink_page_list+0x375/0x550 [ 4321.489137] [<ffffffff81109d03>] shrink_inactive_list+0x2d3/0x470 [ 4321.489140] [<ffffffff8110a3f5>] shrink_zone+0xa5/0x1e0 [ 4321.489142] [<ffffffff8110a7df>] shrink_zones+0x4f/0xf0 [ 4321.489145] [<ffffffff8110a905>] do_try_to_free_pages+0x85/0x2d0 [ 4321.489147] [<ffffffff8110ae7c>] try_to_free_pages+0x9c/0x1c0 [ 4321.489150] [<ffffffff810ff524>] __alloc_pages_nodemask+0x534/0x8e0 [ 4321.489154] [<ffffffff81137c3d>] alloc_pages_vma+0x9d/0x160 [ 4321.489158] [<ffffffff81146711>] do_huge_pmd_anonymous_page+0x151/0x270 [ 4321.489162] [<ffffffff8159f391>] do_page_fault+0x131/0x530 [ 4321.489165] [<ffffffff8159c8b5>] page_fault+0x25/0x30 [ 4321.489183] [<00007ff762f1332f>] 0x7ff762f1332e [ 4801.489084] INFO: task khugepaged:76 blocked for more than 480 seconds. [ 4801.489092] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 4801.489098] khugepaged D ffffffff81605420 0 76 2 0x00000000 [ 4801.489110] ffff880210b05d50 0000000000000046 0000000000000000 ffff880210b05fd8 [ 4801.489121] ffff880210b05d20 ffff880210b05fd8 ffff880210b05fd8 ffff880210b05fd8 [ 4801.489131] ffffffff81c0d020 ffff880210ac6680 ffff880210ac6680 ffff880210ac6680 [ 4801.489140] Call Trace: [ 4801.489166] [<ffffffff8159bdb5>] rwsem_down_failed_common+0xc5/0x160 [ 4801.489183] [<ffffffff812bebc4>] call_rwsem_down_read_failed+0x14/0x30 [ 4801.489197] [<ffffffff8159b2ce>] down_read+0xe/0x10 [ 4801.489210] [<ffffffff81144c2a>] khugepaged_scan_mm_slot+0x4a/0x250 [ 4801.489224] [<ffffffff81144ede>] khugepaged_do_scan+0xae/0xd0 [ 4801.489238] [<ffffffff81144f51>] khugepaged_loop+0x51/0x250 [ 4801.489250] [<ffffffff8114519a>] khugepaged+0x4a/0xc0 [ 4801.489261] [<ffffffff81075c8e>] kthread+0x7e/0x90 [ 4801.489274] [<ffffffff815a5474>] kernel_thread_helper+0x4/0x10 [ 4801.489380] INFO: task virtuoso-t:5171 blocked for more than 480 seconds. [ 4801.489384] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 4801.489390] virtuoso-t D ffffffff81605420 0 5171 4947 0x00000000 [ 4801.489399] ffff8801c6737e70 0000000000000082 ffffffff811184c3 ffff8801c6737fd8 [ 4801.489409] 8000000144ba6067 ffff8801c6737fd8 ffff8801c6737fd8 ffff8801c6737fd8 [ 4801.489419] ffff880213742480 ffff8801cca42080 ffff8802084178a0 ffff8801cca42080 [ 4801.489428] Call Trace: [ 4801.489439] [<ffffffff8159bdb5>] rwsem_down_failed_common+0xc5/0x160 [ 4801.489451] [<ffffffff812bebf3>] call_rwsem_down_write_failed+0x13/0x20 [ 4801.489463] [<ffffffff8159b2ec>] down_write+0x1c/0x1d [ 4801.489474] [<ffffffff811238b9>] sys_mprotect+0xd9/0x260 [ 4801.489486] [<ffffffff815a3292>] system_call_fastpath+0x16/0x1b [ 4801.489525] [<00007ff762f5e307>] 0x7ff762f5e306 [ 4801.489532] INFO: task virtuoso-t:5180 blocked for more than 480 seconds. [ 4801.489536] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 4801.489541] virtuoso-t D 0000000000000000 0 5180 4947 0x00000000 [ 4801.489549] ffff8801c66d78a8 0000000000000082 ffff880199182910 ffff8801c66d7fd8 [ 4801.489559] 0000000000000001 ffff8801c66d7fd8 ffff8801c66d7fd8 ffff8801c66d7fd8 [ 4801.489568] ffff88021020c380 ffff8801ccb7e200 ffffffff81009485 ffff88021fc92d40 [ 4801.489577] Call Trace: [ 4801.489587] [<ffffffff8159a19a>] io_schedule+0x8a/0xd0 [ 4801.489600] [<ffffffff810f5ae9>] sleep_on_page+0x9/0x10 [ 4801.489610] [<ffffffff8159a9ff>] __wait_on_bit+0x4f/0x80 [ 4801.489622] [<ffffffff810f5c1f>] wait_on_page_bit+0x6f/0x80 [ 4801.489633] [<ffffffff811095d5>] shrink_page_list+0x375/0x550 [ 4801.489647] [<ffffffff81109d03>] shrink_inactive_list+0x2d3/0x470 [ 4801.489660] [<ffffffff8110a3f5>] shrink_zone+0xa5/0x1e0 [ 4801.489671] [<ffffffff8110a7df>] shrink_zones+0x4f/0xf0 [ 4801.489681] [<ffffffff8110a905>] do_try_to_free_pages+0x85/0x2d0 [ 4801.489692] [<ffffffff8110ae7c>] try_to_free_pages+0x9c/0x1c0 [ 4801.489704] [<ffffffff810ff524>] __alloc_pages_nodemask+0x534/0x8e0 [ 4801.489719] [<ffffffff81137c3d>] alloc_pages_vma+0x9d/0x160 [ 4801.489732] [<ffffffff81146711>] do_huge_pmd_anonymous_page+0x151/0x270 [ 4801.489746] [<ffffffff8159f391>] do_page_fault+0x131/0x530 [ 4801.489758] [<ffffffff8159c8b5>] page_fault+0x25/0x30 [ 4801.489774] [<00007ff762f1332f>] 0x7ff762f1332e This bug is very annoying -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

15 Feb 15 Feb

09:02

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c15 Bernhard Wiedemann changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |NEEDINFO InfoProvider| |maintenance@opensuse.org --- Comment #15 from Bernhard Wiedemann 2012-02-15 10:02:16 CET --- Can we get a maintenance update for kernel-desktop-3.1* without CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS ? maybe would also be useful for kernel-default as long as fixes like the ones from comment 8 are not included -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

09:12

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c16 Marcus Meissner changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |NEW CC| |meissner@suse.com InfoProvider|maintenance@opensuse.org | --- Comment #16 from Marcus Meissner 2012-02-15 09:12:04 UTC --- we do regular kernel updates, but the content is done by the kernel team and pulled from their GIT repository. so the change needs to go in there and then we can proceed -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

18:31

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c17 --- Comment #17 from Mel Gorman 2012-02-15 18:31:13 UTC --- Created an attachment (id=476319) --> (http://bugzilla.novell.com/attachment.cgi?id=476319) Backport compaction IO interactivity fixes

...

Can we get a maintenance update for kernel-desktop-3.1* without CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS ? maybe would also be useful for kernel-default as long as fixes like the ones from comment 8 are not included

This completely fell off my radar after I made comment #13. The specific fixes were upstream and I generally run either upstream or the SLES kernel on my own desktop depending on which I'm working on at the time so I forgot about it. FWIW, I did investigate the DD throughput problem upstream and came to the conclusion that the main differences between kernels are down to timing. Once the IO was sync, or the time to call sync after dd async completed the write speeds were roughly the same. On disabling CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS, I would rather not except as an absolute last resort. It's enabled by default on other distros and upstream and personally I would prefer to see it continue to be tested. I run it by default on my own machine for example and upstream any fixes. 3.1.10 is the final upstream stable kernel and these patches were always too weighty for -stable anyway. Hence, I'm attaching a backported series that incorporates my fixes and an important readahead fix that affects interactivity, particularly if the machine has an SSD. I'm running an openSUSE kernel with these patches applied on my laptop at the moment. The backport was a tad difficult and it's not quite the same as upstream because of the need to preserve KABI but so far so good. Bernhard, would you be willing to build kernel rpms for wider testing before this is pushed to the kernel tree please? The patch is against the opensuse git kernel tree as opposed to the upstream kernel git tree. If/when they get built, I would appreciate it if people with interactivity problems under IO would test the rpms and report here what their experience was. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

bugzilla_noreply＠novell.com

20:56

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c18 --- Comment #18 from Bernhard Wiedemann 2012-02-15 21:56:44 CET --- OBS started building a patched kernel in https://build.opensuse.org/package/show?package=kernel-desktop&project=home%3Abmwiedemann%3Abranches%3AopenSUSE%3A12.1%3AUpdate which might take a bit I'm not sure, if I applied the patch in the intended way as it needed some extra fiddling to get both the series.conf and the patches.fixes files in the right place, but at least the new code is in. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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20 Feb 20 Feb

16:52

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c19 --- Comment #19 from Marcus Meissner 2012-02-20 16:52:52 UTC --- ping=? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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21 Feb 21 Feb

09:02

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c20 --- Comment #20 from Bernhard Wiedemann 2012-02-21 10:02:53 CET --- Tried the patched kernel on my netbook. I could now write to my slow USB-stick at 5MB/s (much faster than before) and programs like firefox were still usable. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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26 Feb 26 Feb

17:42

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c21 Michal Kubeček changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mkubecek@suse.com --- Comment #21 from Michal Kubeček 2012-02-26 17:42:15 UTC --- I tried latest update (3.1.9-1.4) with the 18 patch series from openSUSE-121 branch and problem seems to be gone. Neither firefox nor kwin are stalled while copying data to a flashdisk, no side-effects observed so far. Thanks for a great job, Mel. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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28 Feb 28 Feb

09:04

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c22 Mel Gorman changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED --- Comment #22 from Mel Gorman 2012-02-28 09:04:04 UTC --- Thanks to everyone who tested and to the person that pushed this patches to branch for me in by absence. I'm marking this bug resolved as per comments 20 and 21. Please reopen if necessary. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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27 Mar 27 Mar

10:15

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c23 Wolfgang Rosenauer changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |REOPENED CC| |wolfgang@rosenauer.org Resolution|FIXED | --- Comment #23 from Wolfgang Rosenauer 2012-03-27 10:15:41 UTC --- Not sure if that's the same. I just had a big issue copying a lot of files to a USB mass storage. It was a MP3 collection and the load was increasing slowly with more and more other processes going stale into D state and in the end the whole cp process didn't proceed anymore. This was with openSUSE 12.1 Hygiea:~ # uname -a Linux Hygiea 3.1.9-1.4-desktop #1 SMP PREEMPT Fri Jan 27 08:55:10 UTC 2012 (efb5ff4) x86_64 x86_64 x86_64 GNU/Linux -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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12:26

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c24 --- Comment #24 from Karl Eichwalder 2012-03-27 14:26:23 CEST --- (In reply to comment #23)

...

Not sure if that's the same. I just had a big issue copying a lot of files to a USB mass storage. It was a MP3 collection and the load was increasing slowly with more and more other processes going stale into D state and in the end the whole cp process didn't proceed anymore.

For me it failed miserably, when copying a Garmin map file (~1GB) to a "new" Garmin device (with USB 2.0). Copying the first 200 or 300 MB was reasonably fast, but then everything slowed down and the machine sometimes even looked frozen. Interestingly, from time to time it recovered and it finally succeeded (after more than an hour). I'm not that sure about the exact numbers, because I did some testing on the machine at the same time... Hardware: x86_64, Core(TM)2 CPU 6320 @ 1.86GHz, with 3 GB RAM. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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12:33

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c25 --- Comment #25 from Marcus Meissner 2012-03-27 12:33:01 UTC --- we have not yet released the update that fixes this... -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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12:44

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c26 --- Comment #26 from Wolfgang Rosenauer 2012-03-27 12:44:52 UTC --- Ah, I've read comment 21 as the exact version I'm running and being a released update. Thanks for the information. So please release the update ;-) -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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10 Apr 10 Apr

14:01

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c Swamp Workflow Management changed: What |Removed |Added ---------------------------------------------------------------------------- Status Whiteboard| |obs:running:440:low -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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13 Apr 13 Apr

13:46

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c27 Karl Eichwalder changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|P5 - None |P1 - Urgent --- Comment #27 from Karl Eichwalder 2012-04-13 15:46:40 CEST --- What about providing a release notes entry for the meantime? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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17 Apr 17 Apr

09:43

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c28 --- Comment #28 from Jan Kara 2012-04-17 09:43:48 UTC --- Karl, thanks for looking into this. AFAIK 12.1 kernel update should be released soon (QA is running now) so I'm not sure it's still worth it... -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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11:18

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c29 --- Comment #29 from Karl Eichwalder 2012-04-17 13:18:46 CEST --- (In reply to comment #28)

...

Karl, thanks for looking into this. AFAIK 12.1 kernel update should be released soon (QA is running now) so I'm not sure it's still worth it...

Ok, in this case, we can probably skip the release notes exercise ;) [I was just bitten again, knowingly, though.] -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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20 Apr 20 Apr

13:16

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c Swamp Workflow Management changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |swamp@suse.de Status Whiteboard|obs:running:440:low | -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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14:08

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c30 --- Comment #30 from Swamp Workflow Management 2012-04-20 14:08:55 UTC --- openSUSE-SU-2012:0540-1: An update that solves 6 vulnerabilities and has 17 fixes is now available. Category: security (low) Bug References: 676204,718918,719416,721739,722350,726600,729247,731387,731590,732908,738397,741128,744658,745832,746695,746980,747404,749569,749651,750079,750106,750959,755812 CVE References: CVE-2011-1083,CVE-2011-4077,CVE-2011-4086,CVE-2012-1090,CVE-2012-1097,CVE-2012-1146 Sources used: openSUSE 12.1 (src): kernel-docs-3.1.10-1.9.2, kernel-source-3.1.10-1.9.1, kernel-syms-3.1.10-1.9.1 -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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25 Apr 25 Apr

20:36

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c31 Jeff Mahoney changed: What |Removed |Added ---------------------------------------------------------------------------- Status|REOPENED |NEEDINFO InfoProvider| |diego.ercolani@gmail.com --- Comment #31 from Jeff Mahoney 2012-04-25 16:36:18 EDT --- Can those affected test with the update? I'd like to close it out if it's set. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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26 Apr 26 Apr

08:13

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c32 --- Comment #32 from Michal Kubeček 2012-04-26 08:13:35 UTC --- Works for me. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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10:10

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c33 --- Comment #33 from Mark Fairbairn 2012-04-26 10:10:31 UTC --- no system freeze when transferring files. Reasonably good transfer speeds. However, since kernel update I have noticed ridiculously incorrect transfer speeds are being reported. e.g. transfer 500mb media file (mp4) to usb stick and transfer speed of 75mb is reported. Transfer is completed in about five seconds according to system tray. However, transfer is not really complete and continues with no notifications for about another minute. - not sure if this is related in anyway to the original bug report or applied fix. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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10:41

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c34 --- Comment #34 from Mel Gorman 2012-04-26 10:41:17 UTC --- (In reply to comment #33)

...

no system freeze when transferring files.

Good news.

...

Reasonably good transfer speeds. However, since kernel update I have noticed ridiculously incorrect transfer speeds are being reported. e.g. transfer 500mb media file (mp4) to usb stick and transfer speed of 75mb is reported. Transfer is completed in about five seconds according to system tray. However, transfer is not really complete and continues with no notifications for about another minute. - not sure if this is related in anyway to the original bug report or applied fix.

The 75MB/sec is probably only taking into account the time needed to copy the data to page cache and deferring the sync to the flusher or the safe removal of the device (i.e. an unmount). In an earlier comment you stated that OpenSUSE 11.4 transferred at a rate of about 8-9 MB/s. For a 500MB file, that would take about a minute which roughly matches what you're seeing now. I suspect that you were doing a sync copy on 11.4 and that's the difference. What are you using to copy the file? It could be some change in the desktop manager. It's not something I would notice myself as I don't use any of the desktop environment file managers. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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13:05

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c35 --- Comment #35 from Mark Fairbairn 2012-04-26 13:05:42 UTC --- yes, overall transfer speed is similar to 11.4 so my previous concerns have been addressed. Just using a split window in dolphin to drag and drop file from home partition to usb pendrive. The transfer speed shown in the notification tray is not an issue for me - but perhaps a separate minor bug to be addressed at some stage as it does give somewhat misleading information reporting the transfer as finished when in fact it is still going on. This could potentially cause file damage / lost file if the usb pendrive is just pulled without first using the safely remove action. But again - probably a separate bug if you do not believe it is related to the latest changes in the kernel -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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13:37

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c36 --- Comment #36 from Mel Gorman 2012-04-26 13:37:10 UTC --- (In reply to comment #35)

...

yes, overall transfer speed is similar to 11.4 so my previous concerns have been addressed.

Good.

...

Just using a split window in dolphin to drag and drop file from home partition to usb pendrive. The transfer speed shown in the notification tray is not an issue for me - but perhaps a separate minor bug to be addressed at some stage as it does give somewhat misleading information reporting the transfer as finished when in fact it is still going on. This could potentially cause file damage / lost file if the usb pendrive is just pulled without first using the safely remove action.

Yes, I understand what you're saying. I have a vague recollection that desktop environments used to identify when they were copying to USB and use a sync copy (either using fdatasync or O_SYNC, not sure which). Maybe that regressed or maybe it is my imagination.

...

But again - probably a separate bug if you do not believe it is related to the latest changes in the kernel

I believe it is unrelated to the latest kernel changes and I do not consider it a kernel bug because the kernel is doing what it's meant to be doing. My recommendation would be to file a bug against dolphin saying that file copies to USB (well, media that can be unplugged in general) should be synchronous to reduce the likelihood of data loss if the user pulls the key before the data is synchronised. Is that reasonable? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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13:51

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c37 --- Comment #37 from Jan Kara 2012-04-26 13:51:26 UTC --- Actually, AFAIK the sync behavior was not done by applications themselves but by udev (or whatever was used to mount devices) which mounted the filesystem in "sync" mode when the media was removable. Anyway, definitely a separate issue... -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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14:00

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c38 --- Comment #38 from Michal Kubeček 2012-04-26 14:00:06 UTC --- Few versions ago, USB mass storage devices were automatically mounted with "sync" option, leading to users complaining about writes being too slow. This may be the reason why "sync" is not default anymore. In the times of HAL, I knew how to change the default mount options, I don't know how to do it today but I assume there is a way. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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14:23

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c39 --- Comment #39 from Karl Eichwalder 2012-04-26 16:23:54 CEST --- Check what other OS vendors do! Do not mount with the sync option, it is too slow (see c#38). Users are not stupid. They learned that you must click the "eject" button (unmount), if you want to remove the device. If you do not click the "eject" button before removing, the file manager will complain loudly (warning pop-up about incompletely copied data, that you must confirm) when pull off the USB device. Such a warning _after_ removing the device is good enough. Data are still there, and the user can repeat the action... When actually moving data, it is a little bit different; there you may warn in advance (but moving data does not happen that often, the user would have to press an additional key, etc. pp.; thus, the user usually copies and then deletes the superfluous data). BTW, The users know as long as the USB device flickers redish, the device is still active and you are not allow to remove it. (Sure, there are devices without busy lights...) -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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30 Apr 30 Apr

12:24

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c40 --- Comment #40 from Karl Eichwalder 2012-04-30 14:24:47 CEST --- Created an attachment (id=488809) --> (http://bugzilla.novell.com/attachment.cgi?id=488809) vmstat.log.gz requested by Michal Hocko. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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14:12

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c41 --- Comment #41 from Kai Dupke 2012-04-30 14:12:41 UTC --- (In reply to comment #39)

...

Users are not stupid.

Users might not be stupid but some of them do not know enough or things might be handled under some rush. I recently got a key with only the half of the presentation from a usually well skilled, experienced contact. My assumption was that this was an accident but such things happen. It will happen more likely if you do things asynchronous. What other OS vendors do? They show the progress in the window the task was initiated and not in some total different region on the screen. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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4 May 4 May

13:05

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c42 --- Comment #42 from Michal Hocko 2012-05-04 15:05:13 CEST --- (In reply to comment #40)

...

Created an attachment (id=488809) --> (http://bugzilla.novell.com/attachment.cgi?id=488809) [details] vmstat.log.gz

requested by Michal Hocko.

grep pswpout bug-719416_vmstat.log | uniq -c 3 pswpout 4170 719 pswpout 5472 27 pswpout 5540 5 pswpout 5612 1 pswpout 5788 908 pswpout 5903 755 pswpout 6024 There is one big peak at the very beginning (after 3s) when we swap out 1300 pages. Which is quite a lot. Other than that we do not swap out a lot (~100) but it is always done in burst which might affect interactivity. So there is something wrong going on with swapping. We are already investigating a similar issue with SLE11SP1. I will follow up here once we come up with something. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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22 May 22 May

09:29

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c43 --- Comment #43 from Michal Hocko 2012-05-22 11:29:47 CEST --- (In reply to comment #42) [...]

...

So there is something wrong going on with swapping. We are already investigating a similar issue with SLE11SP1. I will follow up here once we come up with something.

I will not populate this bug even more so let's move to a separate bug (bug 763399). I suspect that your issue, Karl, is caused by an excessive compaction which mangles aging of the LRU lists. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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24 Jun 24 Jun

13:05

New subject: [Bug 719416] writing to usb flashdisk uses too much cpu and makes system unresponsive

https://bugzilla.novell.com/show_bug.cgi?id=719416 https://bugzilla.novell.com/show_bug.cgi?id=719416#c44 Jiri Slaby changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |RESOLVED CC| |jslaby@suse.com InfoProvider|diego.ercolani@gmail.com | Resolution| |NORESPONSE --- Comment #44 from Jiri Slaby 2013-06-24 07:04:58 UTC --- Is there anything to be handled? Does this still happen with newer releases? Please reopen then... -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

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[Bug 719416] New: writing to usb flashdisk uses too much cpu and makes system unresponsive

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