linux-kernel - Re: [PATCH v6] kvm: make vcpu life cycle separated from kvm instance

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Message-ID: <4EFC79AD.3090104@redhat.com>
Date:	Thu, 29 Dec 2011 16:31:09 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Liu ping fan <kernelfans@...il.com>
CC:	Takuya Yoshikawa <yoshikawa.takuya@....ntt.co.jp>,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	aliguori@...ibm.com, gleb@...hat.com, mtosatti@...hat.com,
	xiaoguangrong.eric@...il.com, jan.kiszka@....de,
	Takuya Yoshikawa <takuya.yoshikawa@...il.com>
Subject: Re: [PATCH v6] kvm: make vcpu life cycle separated from kvm instance

On 12/29/2011 04:03 PM, Liu ping fan wrote:
> > Why do we want an independent grace period, is hotunplugging a vcpu that
> > much different from hotunplugging memory?
> >
> I thought that if less readers on the same srcu lock, then
> synchronize_srcu_expedited() may success to return more quickly.

It would be good to measure it, otherwise it's premature optimization.

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

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