From xen-devel-bounces@lists.xen.org Thu Feb 27 08:06:38 2014 Received: (at maildrop) by bugs.xenproject.org; 27 Feb 2014 08:06:38 +0000 Received: from lists.xen.org ([50.57.142.19]) by bugs.xenproject.org with esmtp (Exim 4.80) (envelope-from ) id 1WIvzK-0002P7-Al for xen-devel-maildrop-Eithu9ie@bugs.xenproject.org; Thu, 27 Feb 2014 08:06:38 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1WIvtg-0008Ox-RM; Thu, 27 Feb 2014 08:00:48 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1WIvte-0008Os-Ix for xen-devel@lists.xenproject.org; Thu, 27 Feb 2014 08:00:46 +0000 Received: from [85.158.139.211:22528] by server-10.bemta-5.messagelabs.com id FF/C4-08578-DA0FE035; Thu, 27 Feb 2014 08:00:45 +0000 X-Env-Sender: JBeulich@suse.com X-Msg-Ref: server-14.tower-206.messagelabs.com!1393488044!6169310!1 X-Originating-IP: [130.57.49.28] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: VHJ1c3RlZCBJUDogMTMwLjU3LjQ5LjI4ID0+IDQ4MDU=\n X-StarScan-Received: X-StarScan-Version: 6.9.16; banners=-,-,- X-VirusChecked: Checked Received: (qmail 16508 invoked from network); 27 Feb 2014 08:00:45 -0000 Received: from nat28.tlf.novell.com (HELO nat28.tlf.novell.com) (130.57.49.28) by server-14.tower-206.messagelabs.com with DHE-RSA-AES256-SHA encrypted SMTP; 27 Feb 2014 08:00:45 -0000 Received: from EMEA1-MTA by nat28.tlf.novell.com with Novell_GroupWise; Thu, 27 Feb 2014 08:00:43 +0000 Message-Id: <530EFEC8020000780011FB81@nat28.tlf.novell.com> X-Mailer: Novell GroupWise Internet Agent 12.0.2 Date: Thu, 27 Feb 2014 08:00:56 +0000 From: "Jan Beulich" To: "Matt Wilson" References: <1383720072-6242-1-git-send-email-gaoyang.zyh@taobao.com> <527A113C02000078000FFF99@nat28.tlf.novell.com> <20140227000405.GA11825@u109add4315675089e695.ant.amazon.com> In-Reply-To: <20140227000405.GA11825@u109add4315675089e695.ant.amazon.com> Mime-Version: 1.0 Content-Disposition: inline Cc: Charles Wang , Ian Campbell , George Dunlap , Andrew Cooper , Zhu Yanhai , Shen Yiben , David Vrabel , xen-devel , Zhu Yanhai , Wan Jia , Boris Ostrovsky Subject: Re: [Xen-devel] [PATCH] x86/fpu: CR0.TS should be set before trap into PV guest's #NM exception handler X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org >>> On 27.02.14 at 01:04, Matt Wilson wrote: > On Wed, Nov 06, 2013 at 08:51:56AM +0000, Jan Beulich wrote: >> Nevertheless I agree that there is an issue, but this needs to be >> fixed on the Linux side (hence adding the Linux maintainers to Cc); >> this issue was introduced way back in 2.6.26 (before that there >> was no allocation on that path). It's not clear though whether >> using GFP_ATOMIC for the allocation would be preferable over >> stts() before calling the allocation function (and clts() if it >> succeeded), or whether perhaps to defer the stts() until we >> actually know the task is being switched out. It's going to be an >> ugly, Xen-specific hack in any event. > > Was there ever a resolution to this problem? I never saw a comment > from the Linux Xen PV maintainers. Neither did I, so no, I'm not aware of a solution. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel