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Re: [dm-devel] hunt for 2.6.37 dm-crypt+ext4 corruption?

On Sun, Dec 05 2010 at  3:28pm -0500,
Andi Kleen <andi firstfloor org> wrote:

> > As another thought, what version of GCC are people using who are having difficulty?   Could this perhaps be a compiler-related issue?
> A compiler problem seems very unlikely here.
> What may be an useful experiment would be to test 2.6.37-rc + ext4 over
> device mapper, but not dmcrypt. If that fails too then it's likely
> some generic device mapper problem.

That would only prove its not dm-crypt; it would not absolve a non-DM
2.6.37-rc change at all.

Leveraging the fact that 2.6.36 + parallel dm-crypt is reportedly very
solid: maybe these would be more interesting (each would keep the latest
parallel dm-crypt patch overlayed for all tests):

1) Test 2.6.37-rc prior to all flush+fua changes (only changes DM saw
   for 2.6.37-rc so far).

2) Back out all ext4 changes that were merged for 2.6.37-rc
   - though Heinz is using XFS exclussively and still reported

3) A full git bisect of good=v2.6.36 bad=v2.6.37-rc4 would be the most
   interesting.  Albeit much more tedious.


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