linux-kernel - Re: bio linked list corruption.

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Message-ID: <0cbc7ee4-9268-9765-dde7-1e28c4cdf8f0@fb.com>
Date:   Fri, 21 Oct 2016 16:38:03 -0400
From:   Chris Mason <clm@...com>
To:     Dave Jones <davej@...emonkey.org.uk>,
        Andy Lutomirski <luto@...capital.net>,
        Andy Lutomirski <luto@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Jens Axboe <axboe@...com>, 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 10/21/2016 04:23 PM, Dave Jones wrote:
> On Fri, Oct 21, 2016 at 04:17:48PM -0400, Chris Mason wrote:
>
>  > > BTRFS warning (device sda3): csum failed ino 130654 off 0 csum 2566472073 expected csum 3008371513
>  > > BTRFS warning (device sda3): csum failed ino 131057 off 4096 csum 3563910319 expected csum 738595262
>  > > BTRFS warning (device sda3): csum failed ino 131176 off 4096 csum 1344477721 expected csum 441864825
>  > > BTRFS warning (device sda3): csum failed ino 131241 off 245760 csum 3576232181 expected csum 2566472073
>  > > BTRFS warning (device sda3): csum failed ino 131429 off 0 csum 1494450239 expected csum 2646577722
>  > > BTRFS warning (device sda3): csum failed ino 131471 off 0 csum 3949539320 expected csum 3828807800
>  > > BTRFS warning (device sda3): csum failed ino 131471 off 4096 csum 3475108475 expected csum 2566472073
>  > > BTRFS warning (device sda3): csum failed ino 131471 off 958464 csum 142982740 expected csum 2566472073
>  > > BTRFS warning (device sda3): csum failed ino 131471 off 0 csum 3949539320 expected csum 3828807800
>  > > BTRFS warning (device sda3): csum failed ino 131532 off 270336 csum 3138898528 expected csum 2566472073
>  > > BTRFS warning (device sda3): csum failed ino 131532 off 1249280 csum 2169165042 expected csum 2566472073
>  > > BTRFS warning (device sda3): csum failed ino 131649 off 16384 csum 2914965650 expected csum 1425742005
>  > >
>  > >
>  > > A curious thing: the expected csum 2566472073 turns up a number of times for different inodes, and gets
>  > > differing actual csums each time.  I suppose this could be something like a block of all zeros in multiple files,
>  > > but it struck me as surprising.
>  > >
>  > > btrfs people: is there an easy way to map those inodes to a filename ? I'm betting those are the
>  > > test files that trinity generates. If so, it might point to a race somewhere.
>  >
>  > btrfs inspect inode 130654 mntpoint
>
> Interesting, they all return
>
> ERROR: ino paths ioctl: No such file or directory
>
> So these files got deleted perhaps ?
>
Yeah, they must have.

-chris