linux-kernel - Re: ext3 issue on 3.6.1

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Message-ID: <20121018212357.GA17646@quack.suse.cz>
Date:	Thu, 18 Oct 2012 23:23:57 +0200
From:	Jan Kara <jack@...e.cz>
To:	Fabio Coatti <fabio.coatti@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: ext3 issue on 3.6.1

On Fri 12-10-12 14:57:55, Fabio Coatti wrote:
> Hi all,
> I'm getting this message on a hp g7 server with kernel 3.6.1:
> 
> [  248.026545] ------------[ cut here ]------------
> [  248.026723] WARNING: at fs/ext3/inode.c:1754
> ext3_journalled_writepage+0x55/0x1a7()
> [  248.026920] Hardware name: ProLiant BL465c G7
> [  248.027049] Pid: 2266, comm: flush-8:0 Not tainted 3.6.1-1000hz-preempt #2
> [  248.027199] Call Trace:
> [  248.027340]  [<ffffffff810578c4>] ? warn_slowpath_common+0x73/0x87
> [  248.027482]  [<ffffffff8115cb86>] ? ext3_journalled_writepage+0x55/0x1a7
> [  248.027653]  [<ffffffff810a279b>] ? __writepage+0xa/0x21
> [  248.027787]  [<ffffffff810a3143>] ? write_cache_pages+0x206/0x2f8
> [  248.027935]  [<ffffffff810a2791>] ? set_page_dirty+0x5e/0x5e
> [  248.028053]  [<ffffffff81297933>] ? queue_unplugged+0x28/0x34
> [  248.028188]  [<ffffffff810a3273>] ? generic_writepages+0x3e/0x55
> [  248.028294]  [<ffffffff810f4da0>] ? __writeback_single_inode+0x39/0xd1
> [  248.028416]  [<ffffffff810f5b59>] ? writeback_sb_inodes+0x206/0x392
> [  248.028551]  [<ffffffff810f5d4c>] ? __writeback_inodes_wb+0x67/0xa2
> [  248.028675]  [<ffffffff810f5eea>] ? wb_writeback+0xfd/0x18b
> [  248.028794]  [<ffffffff810a3639>] ? bdi_dirty_limit+0x27/0x81
> [  248.028908]  [<ffffffff810f60b5>] ? wb_do_writeback+0x13d/0x1a2
> [  248.029031]  [<ffffffff81061edb>] ? add_timer_on+0x61/0x61
> [  248.029142]  [<ffffffff810f6199>] ? bdi_writeback_thread+0x7f/0x13e
> [  248.029306]  [<ffffffff810f611a>] ? wb_do_writeback+0x1a2/0x1a2
> [  248.029401]  [<ffffffff810f611a>] ? wb_do_writeback+0x1a2/0x1a2
> [  248.029498]  [<ffffffff8106e0dc>] ? kthread+0x81/0x89
> [  248.029592]  [<ffffffff816003b4>] ? kernel_thread_helper+0x4/0x10
> [  248.029687]  [<ffffffff8106e05b>] ? kthread_worker_fn+0xe0/0xe0
> [  248.029781]  [<ffffffff816003b0>] ? gs_change+0xb/0xb
> [  248.029872] ---[ end trace e60232a455c8e2dc ]---
  Hum, this is interesting. The warning is:
        WARN_ON_ONCE(IS_RDONLY(inode) &&
                     !(EXT3_SB(inode->i_sb)->s_mount_state & EXT3_ERROR_FS));

  So inode passed to writeback is on read-only filesystem. Is there
anything else iteresting in the logs? Do you have some ext3 filesystem
mounted read-only?

> [13031.051521] ------------[ cut here ]------------
> [13031.051576] WARNING: at fs/inode.c:280 drop_nlink+0x1b/0x35()
> [13031.051624] Hardware name: ProLiant BL465c G7
> [13031.051668] Pid: 3344, comm: php Tainted: G        W
> 3.6.1-1000hz-preempt #2
> [13031.051746] Call Trace:
> [13031.051787]  [<ffffffff810578c4>] ? warn_slowpath_common+0x73/0x87
> [13031.051837]  [<ffffffff810ec628>] ? drop_nlink+0x1b/0x35
> [13031.051885]  [<ffffffff8118ad51>] ? nfs_dentry_iput+0x33/0x49
> [13031.051934]  [<ffffffff810ea920>] ? d_kill+0xe8/0x108
> [13031.051980]  [<ffffffff810eb001>] ? dput+0x147/0x154
> [13031.052027]  [<ffffffff810d9e46>] ? __fput+0x19a/0x1b2
> [13031.052073]  [<ffffffff8106bdf0>] ? task_work_run+0x4c/0x60
> [13031.052123]  [<ffffffff815ff5e8>] ? int_signal+0x12/0x17
> [13031.052169] ---[ end trace e60232a455c8e2dd ]---
  And this seems unrelated - likely an NFS problem... Let's sort this out
if you still see it after ext3 issue is solved.

> the server has a RAID bus controller: Hewlett-Packard Company Smart
> Array G6 controllers (rev 01)
> with hpsa driver. I don't know what exactly else could be useful to
> dig into this, just let me know; please cc: me because I'm not
> subscribed to the list right now.

								Honza
-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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