linux-kernel - Re: Re-tune x86 uaccess code for PREEMPT

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Message-ID: <520A7651.8020301@zytor.com>
Date:	Tue, 13 Aug 2013 11:09:21 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	linux-kernel@...r.kernel.org, x86@...nel.org, mingo@...nel.org,
	torvalds@...ux-foundation.org
Subject: Re: Re-tune x86 uaccess code for PREEMPT_VOLUNTARY

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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