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SubjectRe: btrfs: kernel BUG at mm/page-writeback.c:2286!
On 05/19/2015 03:55 AM, Govindarajulu Varadarajan wrote:
> Hi all
>
> I am seeing the following crash on my btrfs filesystem with nfs export.
> If I disable the nfs share and reboot, I do not hit the crash. Look like
> the crash happens on btrfs with nfs export.
>
> Is this a known issue? Has anyone else faced this? Let me know if you
> need more
> information.
>

Somebody else is unlocking the page while we have it locked (by somebody
else I mean somebody other than in this particular code path, so could
totally still be us, it's just not obvious.) What are your mount
options? Are you capable of building your own kernel? A git bisect
would be good to try and find where the problem was introduced, seems
like it's easy to reproduce. I'll look through our recent commits and
see if anything pops out. Thanks,

Josef



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