Re: [PATCH RESEND] x86: Avoid contention on cpa_lock if possible

[Ido Yariv]

On Fri, Apr 20, 2012 at 1:11 AM, Ido Yariv <ido@xxxxxxxxxx> wrote:
> From: Shai Fultheim <shai@xxxxxxxxxxx>
>
> Some architectures (e.g. vSMP) do not require to serialize cpa, for
> instance, by guaranteeing that the most recent TLB entry will always be
> used.
>
> To avoid needless contention on cpa_lock, do not lock/unlock it on such
> architectures.
>
> Signed-off-by: Shai Fultheim <shai@xxxxxxxxxxx>
> [ido@xxxxxxxxxx: added should_serialize_cpa, handled potential race, and
>                 reworded the commit message]
> Signed-off-by: Ido Yariv <ido@xxxxxxxxxx>
> ---

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