linux-kernel - Re: [Qemu-devel] [RFC] Next gen kvm api

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Date:	Wed, 22 Feb 2012 14:06:27 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Takuya Yoshikawa <takuya.yoshikawa@...il.com>
Cc:	Anthony Liguori <anthony@...emonkey.ws>,
	Avi Kivity <avi@...hat.com>, KVM list <kvm@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	qemu-devel <qemu-devel@...gnu.org>
Subject: Re: [Qemu-devel] [RFC] Next gen kvm api

On Sat, 2012-02-04 at 11:08 +0900, Takuya Yoshikawa wrote:
> The latter needs a fundamental change:  I heard (from Avi) that we can
> change mmu_lock to mutex_lock if mmu_notifier becomes preemptible.
> 
> So I was planning to restart this work when Peter's
>         "mm: Preemptibility"
>         http://lkml.org/lkml/2011/4/1/141
> gets finished. 


That got merged a while ago:

# git describe --contains d16dfc550f5326a4000f3322582a7c05dec91d7a --match "v*"
v3.0-rc1~275

While I still need to get back to unifying mmu_gather across
architectures the whole thing is currently preemptible.
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