linux-kernel - Re: [PATCH v2 3/3] i387: support lazy restore of FPU state

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Message-ID: <20120221180643.GA3157@elte.hu>
Date:	Tue, 21 Feb 2012 19:06:43 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Josh Boyer <jwboyer@...il.com>,
	Jongman Heo <jongman.heo@...sung.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 3/3] i387: support lazy restore of FPU state


* H. Peter Anvin <hpa@...or.com> wrote:

> On 02/20/2012 09:27 PM, Linus Torvalds wrote:
> > 
> > IOW, if you can try this on top of current -git, that would be lovely.
> > 
> 
> This passed all my build tests overnight.
> 
> I don't know if unlazy_fpu() being out of line will cause a context
> switch performance loss, though.
> 
> Otherwise:
> 
> Acked-by: H. Peter Anvin <hpa@...or.com>
> 
> Let me know if you'd prefer me to pull this into the -tip tree.

I think we should put it into tip:x86/fpu or so, and run it 
through all the regular testing channels and queue it up for 
v3.4.

Thanks,

	Ingo
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