[Bug 627272] New: jbd2 writes bocks to the hard disk every few seconds

http://bugzilla.novell.com/show_bug.cgi?id=627272 http://bugzilla.novell.com/show_bug.cgi?id=627272#c0 Summary: jbd2 writes bocks to the hard disk every few seconds Classification: openSUSE Product: openSUSE 11.3 Version: Final Platform: Other OS/Version: Other Status: NEW Severity: Normal Priority: P5 - None Component: Kernel AssignedTo: kernel-maintainers@forge.provo.novell.com ReportedBy: sven.burmeister@gmx.net QAContact: qa@suse.de Found By: --- Blocker: --- User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; de; rv:1.9.2.8) Gecko/20100723 SUSE/3.6.8-0.1.1 Firefox/3.6.8 Via iotop I noticed that although there are no apps writing anything to the hard disk jbd2 constantly writes blocks to the hard disk, e.g.: Jul 31 11:05:57 linux-ly0d kernel: [ 3095.704089] jbd2/sda1-8(342): WRITE block 2638776 on sda1 Jul 31 11:05:57 linux-ly0d kernel: [ 3095.704217] jbd2/sda1-8(342): WRITE block 21286408 on sda1 Jul 31 11:05:57 linux-ly0d kernel: [ 3095.704231] jbd2/sda1-8(342): WRITE block 21286416 on sda1 Jul 31 11:05:57 linux-ly0d kernel: [ 3095.704242] jbd2/sda1-8(342): WRITE block 21286424 on sda1 Jul 31 11:05:57 linux-ly0d kernel: [ 3095.704249] jbd2/sda1-8(342): WRITE block 21286432 on sda1 Jul 31 11:05:57 linux-ly0d kernel: [ 3095.704256] jbd2/sda1-8(342): WRITE block 21286440 on sda1 Jul 31 11:05:57 linux-ly0d kernel: [ 3095.704262] jbd2/sda1-8(342): WRITE block 21286448 on sda1 Jul 31 11:05:57 linux-ly0d kernel: [ 3095.704269] jbd2/sda1-8(342): WRITE block 21286456 on sda1 Jul 31 11:05:57 linux-ly0d kernel: [ 3095.704276] jbd2/sda1-8(342): WRITE block 21286464 on sda1 Jul 31 11:05:57 linux-ly0d kernel: [ 3095.704283] jbd2/sda1-8(342): WRITE block 21286472 on sda1 Jul 31 11:05:57 linux-ly0d kernel: [ 3095.704290] jbd2/sda1-8(342): WRITE block 21286480 on sda1 Jul 31 11:05:57 linux-ly0d kernel: [ 3095.705002] jbd2/sda1-8(342): WRITE block 21286488 on sda1 Jul 31 11:06:00 linux-ly0d kernel: [ 3098.562085] flush-8:0(350): WRITE block 2638776 on sda1 Jul 31 11:06:00 linux-ly0d kernel: [ 3098.562368] rs:main Q:Reg(1431): dirtied inode 275189 (messages) on sda1 Jul 31 11:06:00 linux-ly0d kernel: [ 3098.562391] rs:main Q:Reg(1431): dirtied inode 275189 (messages) on sda1 Jul 31 11:06:00 linux-ly0d kernel: [ 3098.562402] rs:main Q:Reg(1431): dirtied inode 275189 (messages) on sda1 Jul 31 11:06:01 linux-ly0d kernel: [ 3099.704084] jbd2/sda5-8(808): WRITE block 805248 on sda5 Jul 31 11:06:01 linux-ly0d kernel: [ 3099.704229] jbd2/sda5-8(808): WRITE block 21291568 on sda5 Jul 31 11:06:01 linux-ly0d kernel: [ 3099.704242] jbd2/sda5-8(808): WRITE block 21291576 on sda5 Jul 31 11:06:01 linux-ly0d kernel: [ 3099.704790] jbd2/sda5-8(808): WRITE block 21291584 on sda5 Jul 31 11:06:03 linux-ly0d kernel: [ 3101.701086] jbd2/sda1-8(342): WRITE block 2638776 on sda1 Jul 31 11:06:03 linux-ly0d kernel: [ 3101.701187] jbd2/sda1-8(342): WRITE block 21286496 on sda1 Jul 31 11:06:03 linux-ly0d kernel: [ 3101.701201] jbd2/sda1-8(342): WRITE block 21286504 on sda1 Jul 31 11:06:03 linux-ly0d kernel: [ 3101.701701] jbd2/sda1-8(342): WRITE block 21286512 on sda1 Jul 31 11:06:08 linux-ly0d kernel: [ 3106.704112] jbd2/sda1-8(342): WRITE block 21286520 on sda1 Jul 31 11:06:08 linux-ly0d kernel: [ 3106.704172] jbd2/sda1-8(342): WRITE block 21286528 on sda1 Jul 31 11:06:08 linux-ly0d kernel: [ 3106.704480] jbd2/sda1-8(342): WRITE block 21286536 on sda1 Jul 31 11:06:10 linux-ly0d kernel: [ 3108.562064] flush-8:0(350): WRITE block 12586144 on sda1 Jul 31 11:06:10 linux-ly0d kernel: [ 3108.562099] flush-8:0(350): WRITE block 12657376 on sda1 Jul 31 11:06:10 linux-ly0d kernel: [ 3108.562114] flush-8:0(350): WRITE block 33554920 on sda1 Jul 31 11:06:10 linux-ly0d kernel: [ 3108.562159] flush-8:0(350): WRITE block 0 on sda1 Jul 31 11:06:10 linux-ly0d kernel: [ 3108.562231] flush-8:0(350): WRITE block 8 on sda1 Jul 31 11:06:10 linux-ly0d kernel: [ 3108.562243] flush-8:0(350): WRITE block 18840 on sda1 Jul 31 11:06:10 linux-ly0d kernel: [ 3108.562259] flush-8:0(350): WRITE block 12583040 on sda1 Jul 31 11:06:10 linux-ly0d kernel: [ 3108.562272] flush-8:0(350): WRITE block 12583664 on sda1 Jul 31 11:06:10 linux-ly0d kernel: [ 3108.562303] flush-8:0(350): WRITE block 12583992 on sda1 Jul 31 11:06:10 linux-ly0d kernel: [ 3108.562314] flush-8:0(350): WRITE block 12584000 on sda1 Jul 31 11:06:10 linux-ly0d kernel: [ 3108.562326] flush-8:0(350): WRITE block 12585984 on sda1 Jul 31 11:06:10 linux-ly0d kernel: [ 3108.562339] flush-8:0(350): WRITE block 12586136 on sda1 Jul 31 11:06:14 linux-ly0d kernel: [ 3112.704165] jbd2/sda1-8(342): WRITE block 21286544 on sda1 Jul 31 11:06:14 linux-ly0d kernel: [ 3112.704236] jbd2/sda1-8(342): WRITE block 21286552 on sda1 Jul 31 11:06:14 linux-ly0d kernel: [ 3112.704247] jbd2/sda1-8(342): WRITE block 21286560 on sda1 Jul 31 11:06:14 linux-ly0d kernel: [ 3112.704258] jbd2/sda1-8(342): WRITE block 21286568 on sda1 Jul 31 11:06:14 linux-ly0d kernel: [ 3112.704265] jbd2/sda1-8(342): WRITE block 21286576 on sda1 Jul 31 11:06:14 linux-ly0d kernel: [ 3112.704272] jbd2/sda1-8(342): WRITE block 21286584 on sda1 Jul 31 11:06:14 linux-ly0d kernel: [ 3112.704279] jbd2/sda1-8(342): WRITE block 21286592 on sda1 Jul 31 11:06:14 linux-ly0d kernel: [ 3112.704286] jbd2/sda1-8(342): WRITE block 21286600 on sda1 Jul 31 11:06:14 linux-ly0d kernel: [ 3112.704293] jbd2/sda1-8(342): WRITE block 21286608 on sda1 Jul 31 11:06:14 linux-ly0d kernel: [ 3112.704299] jbd2/sda1-8(342): WRITE block 21286616 on sda1 Jul 31 11:06:14 linux-ly0d kernel: [ 3112.704306] jbd2/sda1-8(342): WRITE block 21286624 on sda1 Jul 31 11:06:14 linux-ly0d kernel: [ 3112.704830] jbd2/sda1-8(342): WRITE block 21286632 on sda1 Jul 31 11:06:20 linux-ly0d kernel: [ 3118.562074] flush-8:0(350): WRITE block 0 on sda5 Jul 31 11:06:20 linux-ly0d kernel: [ 3118.562114] flush-8:0(350): WRITE block 8 on sda5 Jul 31 11:06:20 linux-ly0d kernel: [ 3118.562126] flush-8:0(350): WRITE block 8232 on sda5 Jul 31 11:06:20 linux-ly0d kernel: [ 3118.562161] flush-8:0(350): WRITE block 16777520 on sda5 Jul 31 11:06:20 linux-ly0d kernel: [ 3118.562173] flush-8:0(350): WRITE block 16786424 on sda5 Jul 31 11:06:20 linux-ly0d kernel: [ 3118.562241] flush-8:0(350): WRITE block 16786432 on sda5 Jul 31 11:06:20 linux-ly0d kernel: [ 3118.562960] jbd2/sda1-8(342): WRITE block 21286640 on sda1 Jul 31 11:06:20 linux-ly0d kernel: [ 3118.562974] jbd2/sda1-8(342): WRITE block 21286648 on sda1 Jul 31 11:06:20 linux-ly0d kernel: [ 3118.563563] jbd2/sda1-8(342): WRITE block 21286656 on sda1 Jul 31 11:06:25 linux-ly0d kernel: [ 3123.562120] flush-8:0(350): WRITE block 7553088 on sda1 Jul 31 11:06:25 linux-ly0d kernel: [ 3123.701084] jbd2/sda1-8(342): WRITE block 21286664 on sda1 Jul 31 11:06:25 linux-ly0d kernel: [ 3123.701119] jbd2/sda1-8(342): WRITE block 21286672 on sda1 Jul 31 11:06:25 linux-ly0d kernel: [ 3123.701534] jbd2/sda1-8(342): WRITE block 21286680 on sda1 Jul 31 11:06:30 linux-ly0d kernel: [ 3128.562114] flush-8:0(350): WRITE block 7247320 on sda1 Jul 31 11:06:30 linux-ly0d kernel: [ 3128.562263] flush-8:0(350): dirtied inode 275189 (messages) on sda1 Jul 31 11:06:30 linux-ly0d kernel: [ 3128.562284] flush-8:0(350): WRITE block 2638784 on sda1 Jul 31 11:06:30 linux-ly0d kernel: [ 3128.562301] flush-8:0(350): WRITE block 2638792 on sda1 Jul 31 11:06:30 linux-ly0d kernel: [ 3128.562374] flush-8:0(350): dirtied inode 525409 (.xsession-errors) on sda5 Jul 31 11:06:30 linux-ly0d kernel: [ 3128.562394] flush-8:0(350): WRITE block 1049088 on sda5 Jul 31 11:06:31 linux-ly0d kernel: [ 3129.701076] jbd2/sda1-8(342): WRITE block 2638792 on sda1 Jul 31 11:06:31 linux-ly0d kernel: [ 3129.701231] jbd2/sda1-8(342): WRITE block 21286688 on sda1 Jul 31 11:06:31 linux-ly0d kernel: [ 3129.701243] jbd2/sda1-8(342): WRITE block 21286696 on sda1 Jul 31 11:06:31 linux-ly0d kernel: [ 3129.701254] jbd2/sda1-8(342): WRITE block 21286704 on sda1 Jul 31 11:06:31 linux-ly0d kernel: [ 3129.701261] jbd2/sda1-8(342): WRITE block 21286712 on sda1 Jul 31 11:06:31 linux-ly0d kernel: [ 3129.701268] jbd2/sda1-8(342): WRITE block 21286720 on sda1 Jul 31 11:06:31 linux-ly0d kernel: [ 3129.701708] jbd2/sda1-8(342): WRITE block 21286728 on sda1 Jul 31 11:06:35 linux-ly0d kernel: [ 3133.701109] jbd2/sda5-8(808): WRITE block 21291592 on sda5 Jul 31 11:06:35 linux-ly0d kernel: [ 3133.701161] jbd2/sda5-8(808): WRITE block 21291600 on sda5 Jul 31 11:06:35 linux-ly0d kernel: [ 3133.701173] jbd2/sda5-8(808): WRITE block 21291608 on sda5 Jul 31 11:06:35 linux-ly0d kernel: [ 3133.701180] jbd2/sda5-8(808): WRITE block 21291616 on sda5 Jul 31 11:06:35 linux-ly0d kernel: [ 3133.701549] jbd2/sda5-8(808): WRITE block 21291624 on sda5 Jul 31 11:06:36 linux-ly0d kernel: [ 3134.704076] jbd2/sda1-8(342): WRITE block 2638792 on sda1 Jul 31 11:06:36 linux-ly0d kernel: [ 3134.704177] jbd2/sda1-8(342): WRITE block 21286736 on sda1 Jul 31 11:06:36 linux-ly0d kernel: [ 3134.704191] jbd2/sda1-8(342): WRITE block 21286744 on sda1 Jul 31 11:06:36 linux-ly0d kernel: [ 3134.704686] jbd2/sda1-8(342): WRITE block 21286752 on sda1 Jul 31 11:06:42 linux-ly0d kernel: [ 3140.704077] jbd2/sda1-8(342): WRITE block 2638792 on sda1 Jul 31 11:06:42 linux-ly0d kernel: [ 3140.704182] jbd2/sda1-8(342): WRITE block 21286760 on sda1 Jul 31 11:06:42 linux-ly0d kernel: [ 3140.704197] jbd2/sda1-8(342): WRITE block 21286768 on sda1 Jul 31 11:06:42 linux-ly0d kernel: [ 3140.704755] jbd2/sda1-8(342): WRITE block 21286776 on sda1 Jul 31 11:06:45 linux-ly0d kernel: [ 3143.562066] flush-8:0(350): WRITE block 25165968 on sda1 Jul 31 11:06:45 linux-ly0d kernel: [ 3143.562102] flush-8:0(350): WRITE block 25166144 on sda1 Jul 31 11:06:45 linux-ly0d kernel: [ 3143.562116] flush-8:0(350): WRITE block 25175424 on sda1 Jul 31 11:06:45 linux-ly0d kernel: [ 3143.562145] flush-8:0(350): WRITE block 25175440 on sda1 Jul 31 11:06:45 linux-ly0d kernel: [ 3143.562215] flush-8:0(350): WRITE block 25175448 on sda1 Jul 31 11:06:45 linux-ly0d kernel: [ 3143.562226] flush-8:0(350): WRITE block 25175456 on sda1 Jul 31 11:06:45 linux-ly0d kernel: [ 3143.562237] flush-8:0(350): WRITE block 25245280 on sda1 Jul 31 11:06:45 linux-ly0d kernel: [ 3143.562257] flush-8:0(350): WRITE block 0 on sda1 Jul 31 11:06:45 linux-ly0d kernel: [ 3143.562269] flush-8:0(350): WRITE block 8 on sda1 Jul 31 11:06:45 linux-ly0d kernel: [ 3143.562280] flush-8:0(350): WRITE block 8280 on sda1 Jul 31 11:06:45 linux-ly0d kernel: [ 3143.562311] flush-8:0(350): WRITE block 8945880 on sda1 Jul 31 11:06:48 linux-ly0d kernel: [ 3146.704083] jbd2/sda1-8(342): WRITE block 2638792 on sda1 Jul 31 11:06:48 linux-ly0d kernel: [ 3146.704227] jbd2/sda1-8(342): WRITE block 21286784 on sda1 Jul 31 11:06:48 linux-ly0d kernel: [ 3146.704240] jbd2/sda1-8(342): WRITE block 21286792 on sda1 Jul 31 11:06:48 linux-ly0d kernel: [ 3146.704634] jbd2/sda1-8(342): WRITE block 21286800 on sda1 I think the same bug is covered at https://bugs.launchpad.net/ubuntu/+source/linux/+bug/607560 Reproducible: Always -- Configure bugmail: 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