[Bug 463459] New: kernel-default memory/swapping problem
https://bugzilla.novell.com/show_bug.cgi?id=463459 User koenig@linux.de added comment https://bugzilla.novell.com/show_bug.cgi?id=463459#c463448 Summary: kernel-default memory/swapping problem Product: openSUSE 11.1 Version: Final Platform: i686 OS/Version: Other Status: NEW Severity: Critical Priority: P5 - None Component: Kernel AssignedTo: bnc-team-screening@forge.provo.novell.com ReportedBy: koenig@linux.de QAContact: qa@suse.de Found By: --- summary: kernel-default swaps like nuts and kills processes becasue of OOM. kernel-pae works fine! see bug #463448 for preface: P4 with 512 MB, upgraded from 11.0 to 11.1 and installed kernel-default. on this PC I'm running mostly only vdr and very small tasks, with 11.0 this was no problem at all. now with 11.1 and kernel-default the PC is swapping like nuts most of the time when running vdr (without recording or similar). because of of OOM processes get killed by time. "free" shows that most almost all memory is "in use" : total used free shared buffers cached Mem: 513596 508664 4932 0 908 8360 -/+ buffers/cache: 499396 14200 Swap: 1953768 74364 1879404 but "ps uax" shows that only very less memory is "RSS", most processes are completely swapped out (which matches the sound of the hard disks on my raid5!) summing up all RSS fields in "ps aux" output gives only 31276, summing up VSZ shows 578396. reboot did not help, nor does switching of Xserver, (idle) apache etc. full output of ps and dmesg available on request. now I'm back with the kernel-pae which works fine! free shows total used free shared buffers cached Mem: 505788 499572 6216 0 3852 357880 -/+ buffers/cache: 137840 367948 Swap: 1953768 196 1953572 sum of RSS in "ps aux" is 185508, sum of VSZ is 633208. for kernel-pae the ps numbers match the output of free and the overall system behaviour, for kernel-default the ps output seems bogus (or the memory hog is not related to processes ?!) what's wrong with kernel-default ? did anyone ever test -default, now that -pae seems to be the default 32 bit kernel ? where does all the memory go, or what's the problem with ps output ? -- 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.
https://bugzilla.novell.com/show_bug.cgi?id=463459 User koenig@linux.de added comment https://bugzilla.novell.com/show_bug.cgi?id=463459#c1 --- Comment #1 from Harald Koenig <koenig@linux.de> 2009-01-04 11:03:03 MST --- Created an attachment (id=263116) --> (https://bugzilla.novell.com/attachment.cgi?id=263116) output of "free ; ps uaxOT" -- 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.
https://bugzilla.novell.com/show_bug.cgi?id=463459 User koenig@linux.de added comment https://bugzilla.novell.com/show_bug.cgi?id=463459#c2 --- Comment #2 from Harald Koenig <koenig@linux.de> 2009-01-04 11:04:28 MST --- Created an attachment (id=263117) --> (https://bugzilla.novell.com/attachment.cgi?id=263117) output of dmesg -- 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.
https://bugzilla.novell.com/show_bug.cgi?id=463459 Cyril Hrubis <chrubis@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|bnc-team-screening@forge.provo.novell.com |kernel-maintainers@forge.provo.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.
https://bugzilla.novell.com/show_bug.cgi?id=463459 User knikanth@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=463459#c3 Nikanth K <knikanth@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |knikanth@novell.com --- Comment #3 from Nikanth K <knikanth@novell.com> 2009-02-17 01:42:18 MST --- Comparing output of "vmstat -m" and "vmstat -s" between those kernels might help to identify the cause. The default kernel has CONFIG_FLATMEM_MANUAL set where as pae has CONFIG_DISCONTIGMEM_MANUAL set. I wonder whether this can make a difference. -- 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.
https://bugzilla.novell.com/show_bug.cgi?id=463459 User mszeredi@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=463459#c5 Miklos Szeredi <mszeredi@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |NEEDINFO CC| |mszeredi@novell.com Info Provider| |koenig@linux.de --- Comment #5 from Miklos Szeredi <mszeredi@novell.com> 2009-02-23 12:03:34 MST --- Almost all the memory is in slab. Harald, could you please run 'slabtop -s c' and attach the output when the OOM killer starts to kill processes? 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.
https://bugzilla.novell.com/show_bug.cgi?id=463459 User koenig@linux.de added comment https://bugzilla.novell.com/show_bug.cgi?id=463459#c6 --- Comment #6 from Harald Koenig <koenig@linux.de> 2009-02-23 16:11:47 MST --- (In reply to comment #5)
Almost all the memory is in slab.
Harald, could you please run 'slabtop -s c' and attach the output when the OOM killer starts to kill processes?
Thanks.
I'm off for a TeX conference right now. I'll give the the default-kernel another try and provide needed data mid/end of next week... -- 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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