Re: [GIT PULL] SLAB changes for v2.6.39-rc1

From: Pekka Enberg
Date: Thu Mar 24 2011 - 15:04:17 EST


On Thu, Mar 24, 2011 at 9:02 PM, Christoph Lameter <cl@xxxxxxxxx> wrote:
> On Thu, 24 Mar 2011, Eric Dumazet wrote:
>
>> Le jeudi 24 mars 2011 à 13:47 -0500, Christoph Lameter a écrit :
>>
>> > Hmmm.. Could be. KVM would not really disable interrupts so this may
>> > explain that the test case works here.
>> >
>> > Simple fix would be to do a load before the cli I guess.
>> >
>>
>> Hmm...
>>
>> If we have a preemption and migration right after this load...
>
> Cannot be the issue here since init_kmem_cache_cpus already
> touches the per cpu data. At least if CONFIG_PREEMPT is on.
> Is it on?

It's not.
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