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SubjectRe: btrfs bio linked list corruption.
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On 10/11/2016 11:19 AM, Dave Jones wrote:
> On Tue, Oct 11, 2016 at 04:11:39PM +0100, Al Viro wrote:
> > On Tue, Oct 11, 2016 at 10:45:08AM -0400, Dave Jones wrote:
> > > This is from Linus' current tree, with Al's iovec fixups on top.
> >
> > Those iovec fixups are in the current tree...
>
> ah yeah, git quietly dropped my local copy when I rebased so I didn't notice.
>
> > TBH, I don't see anything
> > in splice-related stuff that could come anywhere near that (short of
> > some general memory corruption having random effects of that sort).
> >
> > Could you try to bisect that sucker, or is it too hard to reproduce?
>
> Only hit it the once overnight so far. Will see if I can find a better way to
> reproduce today.

This call trace is reading metadata so we can finish the truncate. I'd
say adding more memory pressure would make it happen more often.

I'll try to trigger.

-chris

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