linux-kernel - Re: [RFC PATCH 04/11] x86,fpu: defer FPU restore until return to userspace

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Message-ID: <54B57AAC.6020903@redhat.com>
Date:	Tue, 13 Jan 2015 15:06:04 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Oleg Nesterov <oleg@...hat.com>
CC:	linux-kernel@...r.kernel.org, mingo@...hat.com, hpa@...or.com,
	matt.fleming@...el.com, bp@...e.de, pbonzini@...hat.com,
	tglx@...utronix.de, luto@...capital.net
Subject: Re: [RFC PATCH 04/11] x86,fpu: defer FPU restore until return to
 userspace

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On 01/13/2015 01:30 PM, Oleg Nesterov wrote:
> On 01/13, Oleg Nesterov wrote:
>> 
>> But yes, I think we need the per-cpu "in_kernel_fpu" and
>> irq_fpu_usable() must die. Please look at
>> http://marc.info/?l=linux-kernel&m=14096628660929

This link does not work for me. I wonder if that email is not
on the marc.info node I managed to send my http request to...

> Plus I think we need this to fix the race with
> math_state_restore()... Please see
> http://marc.info/?l=linux-kernel&m=140992479607206
> 
> Unfortunately I forgot other problems I found in this area... And I
> completely forgot the plan I had in mind ;)

That I can certainly merge into my series.

- -- 
All rights reversed
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