From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Vrabel Subject: Re: [PATCH] gnttab: lock the left grant table earlier in __gnttab_unmap_common() Date: Mon, 11 Nov 2013 16:29:35 +0000 Message-ID: <528105EF.7000207@citrix.com> References: <1384135642-26301-1-git-send-email-msw@linux.com> <5280B723.5060904@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1VfuMv-0006z0-0n for xen-devel@lists.xenproject.org; Mon, 11 Nov 2013 16:29:41 +0000 In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Anthony Liguori Cc: Keir Fraser , Jan Beulich , Matt Wilson , Anthony Liguori , Andrew Cooper , xen-devel@lists.xenproject.org, Matt Wilson List-Id: xen-devel@lists.xenproject.org On 11/11/13 14:48, Anthony Liguori wrote: > Fortunately, Matt has been working > on this problem and that's why he is poking at this code. He's got a > patch that splits the grant lock and we get back all of the lost > performance. Matt, perhaps you can post a WIP version of the patch? Please. Or if it's not ready yet, a summary of the approach taken would be interesting. David