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SubjectRe: Ext3 Errors...
From
Hi there,

Well, that's kind of difficult because it looks a little random when he
does it, and a interval of three days, but also is maybe random.

And the most difficult part is it's only for three seconds, and than it's
gone, so making a crontab script every minute might not even notice it?

Or am I just making a mistake here?

Thanks!

Jim.


> Hi,
>
>> Here is the output of /proc/slabinfo
>>
>> slabinfo - version: 2.1
>> # name <active_objs> <num_objs> <objsize> <objperslab>
>> <pagesperslab> : tunables <limit> <batchcount> <sharedfactor> : slabdata
>> <active_slabs> <num_slabs> <sharedavail>
>> jbd_4k 5 10 4096 1 1 : tunables 24 12
>> 8
>> : slabdata 5 10 0
>> ext3_inode_cache 22447 22696 968 4 1 : tunables 54 27
>> 8
>> : slabdata 5674 5674 0
>> journal_head 740 1280 96 40 1 : tunables 120 60
>> 8
>> : slabdata 27 32 480
>> buffer_head 56406 95386 104 37 1 : tunables 120 60
>> 8
>> : slabdata 2578 2578 480
> <snip>
>
> Thanks for the info. I should have said I'm interested about
> /proc/slabinfo close to the state when the machine starts complaining
> about OOM. Your current numbers look quite sensible so it's hard to see
> if we really leak something or not...
>
>> >> I have something really strange while running kernel 2.6.19.
>> >>
>> >> See the following lines:
>> >>
>> >> Dec 5 23:50:49 kernel: do_get_write_access: OOM for frozen_buffer
>> >> Dec 5 23:50:49 kernel: ext3_free_blocks_sb: aborting transaction:
>> Out
>> >> of
>> >> memory in __ext3_journal_get_undo_access
>> >> Dec 5 23:50:49 kernel: EXT3-fs error (device md1) in
>> >> ext3_free_blocks_sb:
>> >> Out of memory
>> >> Dec 5 23:50:49 kernel: EXT3-fs error (device md1) in
>> >> ext3_reserve_inode_write: Readonly filesystem
>> >> Dec 5 23:50:50 kernel: EXT3-fs error (device md1) in ext3_truncate:
>> Out
>> >> of memory
>> >> Dec 5 23:50:51 kernel: EXT3-fs error (device md1) in
>> >> ext3_reserve_inode_write: Readonly filesystem
>> >> Dec 5 23:50:51 kernel: EXT3-fs error (device md1) in
>> ext3_orphan_del:
>> >> Readonly filesystem
>> >> Dec 5 23:50:51 kernel: EXT3-fs error (device md1) in
>> >> ext3_reserve_inode_write: Readonly filesystem
>> >> Dec 5 23:50:51 kernel: EXT3-fs error (device md1) in
>> ext3_delete_inode:
>> >> Out of memory
>> >>
>> >> And three days later the same:
>> >>
>> >> Dec 8 08:24:29 kernel: do_get_write_access: OOM for frozen_buffer
>> >> Dec 8 08:24:29 kernel: ext3_reserve_inode_write: aborting
>> transaction:
>> >> Out of memory in __ext3_journal_get_write_access
>> >> Dec 8 08:24:29 kernel: EXT3-fs error (device md1) in
>> >> ext3_reserve_inode_write: Out of memory
>> >> Dec 8 08:24:32 kernel: EXT3-fs error (device md1) in
>> ext3_dirty_inode:
>> >> Out of memory
>> >> Dec 8 08:24:32 kernel: EXT3-fs error (device md1) in
>> ext3_new_blocks:
>> >> Readonly filesystem
>> >> Dec 8 08:24:32 kernel: EXT3-fs error (device md1) in
>> >> ext3_reserve_inode_write: Readonly filesystem
>> >> Dec 8 08:24:32 kernel: EXT3-fs error (device md1) in
>> ext3_dirty_inode:
>> >> Out of memory
>> >> Dec 8 08:24:32 kernel: EXT3-fs error (device md1) in
>> >> ext3_prepare_write:
>> >> Out of memory
>> >>
>> >> Now the funny thing is, with kernel 2.6.18.3 I did not had these
>> errors.
>> >> Could it be my memory that is just going nuts, or something else? I
>> have
>> >> seen some other topics about the EXT3 corruption problems. Maybe this
>> is
>> >> also the same thing?
>> > Probably some error on the kernel's side. Maybe somebody (e.g. my
>> new
>> > code in jbd commit) forgets to release some buffers? What does your
>> > /proc/slabinfo look like? Thanks for report.
>
> Honza
> -
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