linux-kernel - Re: bio linked list corruption.

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Message-ID: <20161018234248.GB93792@clm-mbp.masoncoding.com>
Date:   Tue, 18 Oct 2016 19:42:49 -0400
From:   Chris Mason <clm@...com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
CC:     Jens Axboe <axboe@...com>, Dave Jones <davej@...emonkey.org.uk>,
        Al Viro <viro@...iv.linux.org.uk>, Josef Bacik <jbacik@...com>,
        David Sterba <dsterba@...e.com>,
        linux-btrfs <linux-btrfs@...r.kernel.org>,
        Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: bio linked list corruption.

On Tue, Oct 18, 2016 at 04:39:22PM -0700, Linus Torvalds wrote:
>On Tue, Oct 18, 2016 at 4:31 PM, Chris Mason <clm@...com> wrote:
>>
>> Jens, not sure if you saw the whole thread.  This has triggered bad page
>> state errors, and also corrupted a btrfs list.  It hurts me to say, but it
>> might not actually be your fault.
>
>Where is that thread, and what is the "this" that triggers problems?
>
>Looking at the "->mq_list" users, I'm not seeing any changes there in
>the last year or so. So I don't think it's the list itself.

Seems to be the whole thing:

http://www.gossamer-threads.com/lists/linux/kernel/2545792

My guess is xattr, but I don't have a good reason for that.

-chris