From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Zijlstra Subject: Re: [PATCH 0/9] qspinlock stuff -v15 Date: Thu, 19 Mar 2015 19:32:20 +0100 Message-ID: <20150319183220.GU23123__35276.1141527028$1426790060$gmane$org@twins.programming.kicks-ass.net> References: <20150316131613.720617163@infradead.org> <550B0EFE.1040309@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1YYfFA-00018n-1W for xen-devel@lists.xenproject.org; Thu, 19 Mar 2015 18:32:32 +0000 Content-Disposition: inline In-Reply-To: <550B0EFE.1040309@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: David Vrabel Cc: Waiman.Long@hp.com, linux-arch@vger.kernel.org, riel@redhat.com, x86@kernel.org, kvm@vger.kernel.org, oleg@redhat.com, scott.norton@hp.com, raghavendra.kt@linux.vnet.ibm.com, paolo.bonzini@gmail.com, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, mingo@redhat.com, doug.hatch@hp.com, hpa@zytor.com, luto@amacapital.net, xen-devel@lists.xenproject.org, boris.ostrovsky@oracle.com, paulmck@linux.vnet.ibm.com, torvalds@linux-foundation.org, tglx@linutronix.de List-Id: xen-devel@lists.xenproject.org On Thu, Mar 19, 2015 at 06:01:34PM +0000, David Vrabel wrote: > This seems work for me, but I've not got time to give it a more thorough > testing. > > You can fold this into your series. Thanks! > There doesn't seem to be a way to disable QUEUE_SPINLOCKS when supported by > the arch, is this intentional? If so, the existing ticketlock code could go. Yeah, its left as a rudiment such that if we find issues with the qspinlock code we can 'revert' with a trivial patch. If no issues show up we can rip out all the old code in a subsequent release.