linux-kernel - Re: [PATCH][KVM][retry 1] Add support for Pause Filtering to AMD SVM

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Message-ID: <4A083EE4.6000607@redhat.com>
Date:	Mon, 11 May 2009 18:06:12 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
CC:	Ingo Molnar <mingo@...e.hu>,
	Mark Langsdorf <mark.langsdorf@....com>,
	Joerg Roedel <joerg.roedel@....com>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH][KVM][retry 1] Add support for Pause Filtering to AMD
 SVM

Peter Zijlstra wrote:
>>> This really needs a new kernel-internal scheduler API though, which 
>>> does a lot of fancy things to do:
>>>
>>>         se->vruntime += 1000000;
>>>
>>> i.e. add 1 msec worth of nanoseconds to the task's timeline. (first 
>>> remove it from the rbtree, then add it back, and nice-weight it as 
>>> well) 
>>>       
>> I suspected it would be as simple as this.
>>     
>
> Is that thread guaranteed to run as SCHED_OTHER?
>   

No, it's user specified.  But if it isn't SCHED_OTHER, we don't mind if 
it spins (and we hope realtime systems aren't overcommitted).

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

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