Re: [PATCH 1/4] cpuset: convert callback_mutex to a spinlock

[Christoph Lameter]

On Fri, 26 Sep 2014, Vladimir Davydov wrote:

> The callback_mutex is only used to synchronize reads/updates of cpusets'
> flags and cpu/node masks. These operations should always proceed fast so
> there's no reason why we can't use a spinlock instead of the mutex.

Checked that and given the other restrictions already on the use of
callback_mutex this is to be expected.

Acked-by: Christoph Lameter <cl@xxxxxxxxx>

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