https://bugzilla.kernel.org/show_bug.cgi?id=29402

--- Comment #10 from Eric Whitney <eric.whitney@hp.com>  2011-02-26 03:50:09 ---

Created an attachment (id=49172)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=49172)
Possible fix - patch simplifies completion counting and avoids races

Hi Lukas:

This patch has successfully passed an initial round of tests which 2.6.38-rc*
kernels have never passed.  It seemed appropriate to simplify the way
outstanding completions were being accounted for to avoid the races, and the
code ought to be just a little more efficient on a SMP/NUMA box as well.  At
any rate, it's a stab at it - I'd appreciate any comments you might have.  I'll
put it through a weekend's worth of test runs next.

Thanks!
Eric

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