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    SubjectRe: [block IO crash] Re: 2.6.39-rc5-git2 boot crashs
    On Wed, 4 May 2011, Christoph Lameter wrote:
    > Subject: slub: Remove CONFIG_CMPXCHG_LOCAL ifdeffery
    > Remove the #ifdefs. This means that the irqsafe_cpu_cmpxchg_double() is used
    > everywhere.
    > There may be performance implications since:
    > A. We now have to manage a transaction ID for all arches
    > B. The interrupt holdoff for arches not supporting CONFIG_CMPXCHG_LOCAL is reduced
    > to a very short irqoff section.
    > There are no multiple irqoff/irqon sequences as a result of this change. Even in the fallback
    > case we only have to do one disable and enable like before.
    > Signed-off-by: Christoph Lameter <>

    This doesn't apply cleanly on top of slab/next which has some of your
    cleanup patches applied. There's some CONFIG_PREEMPT conflicts so I'd
    rather you rediffed it yourself.


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