Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752128Ab3IINMb (ORCPT ); Mon, 9 Sep 2013 09:12:31 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:37010 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751178Ab3IINMa (ORCPT ); Mon, 9 Sep 2013 09:12:30 -0400 Date: Mon, 9 Sep 2013 09:12:18 -0400 From: Konrad Rzeszutek Wilk To: David Vrabel Cc: Konrad Rzeszutek Wilk , jeremy@goop.org, stefano.stabellini@eu.citrix.com, linux-kernel@vger.kernel.org, stefan.bader@canonical.com, xen-devel@lists.xenproject.org, boris.ostrovsky@oracle.com Subject: Re: [Xen-devel] [PATCH] Bug-fixes to enable PV ticketlock to work under Xen PVHVM with Linux v3.12. (v1) Message-ID: <20130909131218.GD21435@phenom.dumpdata.com> References: <1378561605-18998-1-git-send-email-konrad.wilk@oracle.com> <522DA442.4050803@citrix.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <522DA442.4050803@citrix.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-Source-IP: acsinet21.oracle.com [141.146.126.237] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1970 Lines: 42 On Mon, Sep 09, 2013 at 11:34:42AM +0100, David Vrabel wrote: > On 07/09/13 14:46, Konrad Rzeszutek Wilk wrote: > > After a bit of false starts, lots of debugging, and tons of help from Stefano and > > David on how event mechanism is suppose to work I am happy to present a set > > of bug-fixes that make PV ticketlocks work under Xen PVHVM with Linux v3.12. > > > > v3.12 has now thanks to commit 816434ec4a674fcdb3c2221a6dffdc8f34020550 > > (Merge branch 'x86-spinlocks-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip) > > PV ticketlocks. That means: > > - Xen PV bytelock has been replaced by Xen PV ticketlock. > > - Xen PVHVM is using ticketlock (not PV variant) - this patch makes it PV. > > - baremetal is still using ticketlocks. > > > > In other words everything in the kernel is ticketlock based with the virtualizations > > having the 'PV' part to aid. > > > > Please take a look at the patches. If you are interested in testing them > > out I will post a git tree on Monday based on v3.11 and v3.12-rc0. > > > > Note that I had not run any performance tests and I am not sure when I will > > be able to (got other bugs to squash now). I've asked our internal performance > > engineer to do some benchmarking - but those results won't be available for > > some time as it takes time to do good benchmarking. > > If there was favourable performance data I would be happy for these to > go in 3.12, without I think they'll have to wait for 3.13. Then they will have to wait. I am not going to be able to provide those within this month. > > David > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xen.org > http://lists.xen.org/xen-devel -- 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/