lkml.org 
[lkml]   [2011]   [May]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
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 <cl@linux.com>

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.

Pekka


\
 
 \ /
  Last update: 2011-05-04 17:45    [from the cache]
©2003-2014 Jasper Spaans. hosted at Digital Ocean