linux-kernel - Re: btrfs: kernel BUG at mm/page-writeback.c:2286!

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Message-ID: <20150519135416.GO2539@wloczykij>
Date:	Tue, 19 May 2015 15:54:17 +0200
From:	Piotr Szymaniak <szarpaj@...belek.pl>
To:	Chris Mason <clm@...com>
Cc:	Govindarajulu Varadarajan <_govind@....com>,
	linux-btrfs@...r.kernel.org, linux-nfs@...r.kernel.org,
	linux-kernel@...r.kernel.org, jbacik@...com, dsterba@...e.cz
Subject: Re: btrfs: kernel BUG at mm/page-writeback.c:2286!

On Tue, May 19, 2015 at 09:43:10AM -0400, Chris Mason wrote:
> On 05/19/2015 03:55 AM, Govindarajulu Varadarajan wrote:
> > 2286--->BUG_ON(!PageLocked(page));
> > 
> > [  166.769868] BTRFS info (device sdf): no csum found for inode 1154
> > start 43192320
> > [  166.774334] BTRFS info (device sdf): csum failed ino 1154 extent
> > 4434247680 csum 1388825687 wanted 0 mirror 0
> 
> 
> Josef and I both missed this the first time you pasted it, but the
> unlocked page is almost certainly related to this csum error.  While
> we're looking at things can you please scrub?

Hi,

In the original report there was:

> [root@stg ~]#btrfs scru status /mnt/stg
> scrub status for dd10b751-d2aa-40d1-971f-e15b0062dd11
>         scrub started at Tue May 19 03:33:26 2015 and finished after 468 seconds
>         total bytes scrubbed: 101.80GiB with 0 errors

Correct me if I'm wrong, but I think that Govindarajulu Varadarajan made the
scrub _after_ the crash.


Piotr Szymaniak.
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