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

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Message-ID: <5205C4BB.6020003@zytor.com>
Date:	Fri, 09 Aug 2013 21:42:35 -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:
> 
> This patch kit is an attempt to get us back to sane code, 
> mostly by doing proper inlining and doing sleep checks in the right
> place. Unfortunately I had to add one tree sweep to avoid an nasty
> include loop.
> 
> It costs a bit of text space, but I think it's worth it
> (if only to keep my blood pressure down while reading ftrace logs...)
> 

Looks nice at first glance.

Now, here is a bigger question: shouldn't we be deprecating/getting rid
of PREEMPT_VOUNTARY in favor of PREEMPT?

	-hpa


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