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SubjectRe: [PATCH -v2] rmap: make anon_vma_prepare link in all the anon_vmas of a mergeable VMA


On Sat, 10 Apr 2010, Borislav Petkov wrote:
> >
> > I will keep running that kernel in the next couple of days and keep you
> > informed in case this is the fix we're gonna use.
>
> Yep, you jinxed it :)
>
> This time we got stuck on the anon_vma->lock (yep, we've seen that
> oopsie before). So, it might be that we _really_ are staring at the
> wrong code... Back to square one.

No, I think we're good. I suspect this is a different issue. Do you have
lockdep enabled, along with mutex and spinlock debugging etc? That might
help pinpoint what triggers this.

But I think the fact that you are apparently not able to get the list
corruption is a good sign. Of course, it might just be harder to trigger,
and these things could all be a sign of a different bug, but my gut feel
is that we did fix something, and you are just damn good at stressing the
new code. Kudos.

Linus


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