Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753632AbaLANcs (ORCPT ); Mon, 1 Dec 2014 08:32:48 -0500 Received: from cantor2.suse.de ([195.135.220.15]:40493 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752404AbaLANcr (ORCPT ); Mon, 1 Dec 2014 08:32:47 -0500 Date: Mon, 1 Dec 2014 14:32:45 +0100 From: "Luis R. Rodriguez" To: David Vrabel Cc: Juergen Gross , Andrew Cooper , x86@kernel.org, kvm@vger.kernel.org, "Luis R. Rodriguez" , linux-kernel@vger.kernel.org, Davidlohr Bueso , Joerg Roedel , Jan Beulich , xen-devel@lists.xenproject.org, boris.ostrovsky@oracle.com, Borislav Petkov , Olaf Hering Subject: Re: [Xen-devel] [PATCH] xen: privcmd: schedule() after private hypercall when non CONFIG_PREEMPT Message-ID: <20141201133245.GA25677@wotan.suse.de> References: <1417040805-15857-1-git-send-email-mcgrof@do-not-panic.com> <5476C66F.5040308@suse.com> <20141127183616.GV25677@wotan.suse.de> <54777277.5040401@citrix.com> <5477FECF.2060404@suse.com> <547C4A7E.6020207@citrix.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <547C4A7E.6020207@citrix.com> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Dec 01, 2014 at 11:01:18AM +0000, David Vrabel wrote: > On 28/11/14 04:49, Juergen Gross wrote: > > On 11/27/2014 07:50 PM, Andrew Cooper wrote: > >> > >> XenServer uses > >> > >> https://github.com/xenserver/linux-3.x.pg/blob/master/master/0001-x86-xen-allow-privcmd-hypercalls-to-be-preempted.patch > >> > >> > >> to deal with these issues. That patch is based on 3.10. > > > > Clever. :-) > > > >> > >> I can remember whether this has been submitted upstream before (and > >> there were outstanding issues), or whether it fell at an inconvenient > >> time with our development cycles. > > > > I found > > > > http://lists.xen.org/archives/html/xen-devel/2014-02/msg02540.html > > > > and nothing else. > > I dropped it because it copy-and-paste a bunch of otherwise generic x86 > assembler and looked unlikely to get an x86 maintainer ack. If you > think otherwise, feel free to pick it up and run with it. I was trying to run with it, but my biggest gripe with this was the use of preempt_schedule_irq(), but we can review that on the other thread. Luis -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/