From: Keir Fraser <keir.fraser@eu.citrix.com>
To: Kouya Shimura <kouya@jp.fujitsu.com>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: [PATCH] x86/mm: disallow mmu hypercalls for a dying domain
Date: Fri, 27 Nov 2009 08:08:39 +0000 [thread overview]
Message-ID: <C7353987.2E3B%keir.fraser@eu.citrix.com> (raw)
In-Reply-To: <7kocmoxz9p.fsf@pingu.sky.yk.fujitsu.co.jp>
Since the check is made with no locks held, I don't think any race can be
completely avoided here. I'm not sure the performance argument holds much
water either -- this just looks like a pointless extra check.
-- Keir
On 27/11/2009 06:22, "Kouya Shimura" <kouya@jp.fujitsu.com> wrote:
> The race condition should be avoided for efficiency.
>
> Signed-off-by: Kouya Shimura <kouya@jp.fujitsu.com>
>
next prev parent reply other threads:[~2009-11-27 8:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-27 6:22 [PATCH] x86/mm: disallow mmu hypercalls for a dying domain Kouya Shimura
2009-11-27 8:08 ` Keir Fraser [this message]
2009-11-27 9:10 ` Kouya Shimura
2009-11-27 9:43 ` Keir Fraser
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