Re: Re-tune x86 uaccess code for PREEMPT_VOLUNTARY

From: H. Peter Anvin
Date: Tue Aug 13 2013 - 14:10:17 EST


On 08/09/2013 04:04 PM, Andi Kleen wrote:
> The x86 user access functions (*_user) were originally very well tuned,
> with partial inline code and other optimizations.
>
> Then over time various new checks -- particularly the sleep checks for
> a voluntary preempt kernel -- destroyed a lot of the tunings
>

Hi Andi,

Are you going to respin this patchset to address the feedback?

-hpa


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