linux-kernel - Re: 2.6.22-rc1-mm1

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Message-ID: <464B382F.3090307@gmail.com>
Date:	Wed, 16 May 2007 18:58:23 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	Michal Piotrowski <michal.k.k.piotrowski@...il.com>
CC:	Nick Piggin <nickpiggin@...oo.com.au>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Trond Myklebust <trond.myklebust@....uio.no>
Subject: Re: 2.6.22-rc1-mm1

Michal Piotrowski napsal(a):
> On 16/05/07, Nick Piggin <nickpiggin@...oo.com.au> wrote:
>> Michal Piotrowski wrote:
>> > Andrew Morton napisał(a):
>> >
>> >>ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.22-rc1/2.6.22-rc1-mm1/
>>
>> >>
>> >>
>> >>- I found some time to look into some writeback problems in
>> >>  fs/fs-writeback.c.
>> >
>> >
>> > This might be related
>> >
>> > [   97.740021] BUG: at /home/devel/linux-mm/mm/page-writeback.c:829
>> __set_page_dirty_nobuffers()
>> > [   97.748632]  [<c0105276>] dump_trace+0x63/0x1eb
>> > [   97.753275]  [<c0105418>] show_trace_log_lvl+0x1a/0x30
>> > [   97.758521]  [<c010605a>] show_trace+0x12/0x14
>> > [   97.763042]  [<c01060f7>] dump_stack+0x16/0x18
>> > [   97.767590]  [<c01677b3>] __set_page_dirty_nobuffers+0xfe/0x16e
>> > [   97.773598]  [<c0167833>] redirty_page_for_writepage+0x10/0x12
>> > [   97.779491]  [<c01a473a>] __block_write_full_page+0x1dc/0x335
>> > [   97.785328]  [<c01a495c>] block_write_full_page+0xc9/0xd1
>> > [   97.790799]  [<c01a781a>] blkdev_writepage+0x12/0x14
>> > [   97.795829]  [<c01674ea>] __writepage+0xe/0x29
>> > [   97.800350]  [<c01679b8>] write_cache_pages+0x183/0x29a
>> > [   97.805683]  [<c0167af1>] generic_writepages+0x22/0x2a
>> > [   97.810929]  [<c0167b1c>] do_writepages+0x23/0x34
>> > [   97.815702]  [<c019f0a3>] __writeback_single_inode+0x245/0x472
>> > [   97.821632]  [<c019f7e6>] generic_sync_sb_inodes+0x347/0x4cc
>> > [   97.827379]  [<c019f98b>] sync_sb_inodes+0x20/0x24
>> > [   97.832247]  [<c019fb93>] writeback_inodes+0x79/0xc2
>> > [   97.837296]  [<c0168173>] wb_kupdate+0x7a/0xdb
>> > [   97.841833]  [<c01686a0>] pdflush+0xf1/0x189
>> > [   97.846173]  [<c0137d41>] kthread+0x3b/0x62
>> > [   97.850461]  [<c0104e3f>] kernel_thread_helper+0x7/0x10
>>
>> No, that's a debugging patch I put in that missed a couple of corner
>> cases
>> (oops, you live and learn!).
>>
>> Actually I worked out what this one is too: just a case of a page with
>> buffers (so the page itself may be dirty && !uptodate), which is calling
>> __set_page_dirty_nobuffers via redirty_page_for_writepages.
>>
>> The patch I sent out earlier to fix Jiri's NFS warnings should take care
>> of this one as well.
> 
> Problem fixed, thanks.

For me too.

thanks,
-- 
http://www.fi.muni.cz/~xslaby/            Jiri Slaby
faculty of informatics, masaryk university, brno, cz
e-mail: jirislaby gmail com, gpg pubkey fingerprint:
 B674 9967 0407 CE62 ACC8  22A0 32CC 55C3 39D4 7A7E
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