From mboxrd@z Thu Jan  1 00:00:00 1970
From: Avi Kivity <avi@qumranet.com>
Subject: Re: KVM: MMU: kvm_pv_mmu_op should not take mmap_sem
Date: Sun, 20 Apr 2008 11:30:49 +0300
Message-ID: <480AFF39.3040105@qumranet.com>
References: <20080416201906.GA3551@dmt>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Cc: kvm-devel <kvm-devel@lists.sourceforge.net>
To: Marcelo Tosatti <mtosatti@redhat.com>
Return-path: <kvm-devel-bounces@lists.sourceforge.net>
In-Reply-To: <20080416201906.GA3551@dmt>
List-Unsubscribe: <https://lists.sourceforge.net/lists/listinfo/kvm-devel>,
	<mailto:kvm-devel-request@lists.sourceforge.net?subject=unsubscribe>
List-Archive: <http://sourceforge.net/mailarchive/forum.php?forum_name=kvm-devel>
List-Post: <mailto:kvm-devel@lists.sourceforge.net>
List-Help: <mailto:kvm-devel-request@lists.sourceforge.net?subject=help>
List-Subscribe: <https://lists.sourceforge.net/lists/listinfo/kvm-devel>,
	<mailto:kvm-devel-request@lists.sourceforge.net?subject=subscribe>
Sender: kvm-devel-bounces@lists.sourceforge.net
Errors-To: kvm-devel-bounces@lists.sourceforge.net
List-Id: kvm.vger.kernel.org

Marcelo Tosatti wrote:
> kvm_pv_mmu_op should not take mmap_sem. All gfn_to_page() callers down
> in the MMU processing will take it if necessary, so as it is it can
> deadlock.
>
> Apparently a leftover from the days before slots_lock.
>   

Applied, thanks.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.


-------------------------------------------------------------------------
This SF.net email is sponsored by the 2008 JavaOne(SM) Conference 
Don't miss this year's exciting event. There's still time to save $100. 
Use priority code J8TL2D2. 
http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone