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From: Avi Kivity <avi@qumranet.com>
To: Rusty Russell <rusty@rustcorp.com.au>
Cc: Ingo Molnar <mingo@elte.hu>,
	kvm-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org
Subject: Re: [kvm-devel] [PATCH][RFC] kvm-scheduler integration
Date: Wed, 11 Jul 2007 08:50:49 +0300	[thread overview]
Message-ID: <46946FB9.5040705@qumranet.com> (raw)
In-Reply-To: <469332F3.1000808@qumranet.com>

Avi Kivity wrote:
>
>> The
>> congruent case which comes to mind is lazy FPU handling.
>>   
>
> That one has preempt_ops in hardware: cr0.ts and #NM.

However, that doesn't handle in-kernel use of the fpu.  
kernel_fpu_begin()/kernel_fpu_end() could easily be modified to take 
advantage of a generic preempt hook.  I'll add a patch for that, and we 
gain preemptible raid-5 parity calculation.


-- 
error compiling committee.c: too many arguments to function


WARNING: multiple messages have this Message-ID (diff)
From: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
To: Rusty Russell <rusty-8n+1lVoiYb80n/F98K4Iww@public.gmane.org>
Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH][RFC] kvm-scheduler integration
Date: Wed, 11 Jul 2007 08:50:49 +0300	[thread overview]
Message-ID: <46946FB9.5040705@qumranet.com> (raw)
In-Reply-To: <469332F3.1000808-atKUWr5tajBWk0Htik3J/w@public.gmane.org>

Avi Kivity wrote:
>
>> The
>> congruent case which comes to mind is lazy FPU handling.
>>   
>
> That one has preempt_ops in hardware: cr0.ts and #NM.

However, that doesn't handle in-kernel use of the fpu.  
kernel_fpu_begin()/kernel_fpu_end() could easily be modified to take 
advantage of a generic preempt hook.  I'll add a patch for that, and we 
gain preemptible raid-5 parity calculation.


-- 
error compiling committee.c: too many arguments to function


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  parent reply	other threads:[~2007-07-11  6:18 UTC|newest]

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-07-08 12:58 [PATCH][RFC] kvm-scheduler integration Avi Kivity
2007-07-08 12:58 ` Avi Kivity
2007-07-08 13:09 ` Ingo Molnar
2007-07-08 13:09   ` Ingo Molnar
2007-07-08 13:16   ` Avi Kivity
2007-07-08 13:36     ` Ingo Molnar
2007-07-08 13:35 ` Ingo Molnar
2007-07-08 13:35   ` Ingo Molnar
2007-07-08 13:41   ` Avi Kivity
2007-07-08 13:41     ` Avi Kivity
2007-07-08 13:48     ` Ingo Molnar
2007-07-08 13:48       ` Ingo Molnar
2007-07-08 13:53       ` Avi Kivity
2007-07-08 13:53         ` Avi Kivity
2007-07-08 13:59         ` Ingo Molnar
2007-07-08 13:59           ` Ingo Molnar
2007-07-08 15:13           ` Avi Kivity
2007-07-08 15:13             ` Avi Kivity
2007-07-10 11:18           ` Avi Kivity
2007-07-10 11:18             ` Avi Kivity
2007-07-10 11:30             ` Ingo Molnar
2007-07-10 11:30               ` Ingo Molnar
2007-07-08 23:32       ` [kvm-devel] " Rusty Russell
2007-07-08 23:32         ` Rusty Russell
2007-07-09  6:39         ` [kvm-devel] " Avi Kivity
2007-07-09  6:39           ` Avi Kivity
2007-07-10  1:09           ` [kvm-devel] " Rusty Russell
2007-07-10  1:09             ` Rusty Russell
2007-07-10  5:53             ` [kvm-devel] " Avi Kivity
2007-07-10  5:53               ` Avi Kivity
2007-07-10  6:47               ` [kvm-devel] " Rusty Russell
2007-07-10  6:47                 ` Rusty Russell
2007-07-10  7:19                 ` [kvm-devel] " Avi Kivity
2007-07-10  7:19                   ` Avi Kivity
2007-07-10  8:01                   ` [kvm-devel] " Rusty Russell
2007-07-10  8:01                     ` Rusty Russell
2007-07-10  8:24                     ` [kvm-devel] " Avi Kivity
2007-07-10  8:24                       ` Avi Kivity
2007-07-11  5:50                   ` Avi Kivity [this message]
2007-07-11  5:50                     ` Avi Kivity
2007-07-08 19:07 ` Andi Kleen
2007-07-09  6:41   ` Avi Kivity
2007-07-09  6:41     ` Avi Kivity
2007-07-09  8:50 ` Shaohua Li
2007-07-09  8:50   ` Shaohua Li
2007-07-09  9:46   ` Avi Kivity
2007-07-09  9:46     ` Avi Kivity
2007-07-09 10:21     ` Avi Kivity
2007-07-09 10:21       ` Avi Kivity

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