From mboxrd@z Thu Jan 1 00:00:00 1970 From: Will Deacon Subject: Re: =?utf-8?B?562U5aSN?= =?utf-8?Q?=3A?= [PATCH 0/3] arm64: queued spinlocks and rw-locks Date: Fri, 5 May 2017 13:26:40 +0100 Message-ID: <20170505122639.GB14111@arm.com> References: <20170503145141.4966-1-ynorov@caviumnetworks.com> <20170504202809.lv222a3oes54ijkj@yury-N73SV> <20170505115303.s3bsu4adfgkxrhh2@hirez.programming.kicks-ass.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from foss.arm.com ([217.140.101.70]:50612 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751435AbdEEM0h (ORCPT ); Fri, 5 May 2017 08:26:37 -0400 Content-Disposition: inline In-Reply-To: <20170505115303.s3bsu4adfgkxrhh2@hirez.programming.kicks-ass.net> Sender: linux-arch-owner@vger.kernel.org List-ID: To: Peter Zijlstra Cc: Yury Norov , pan xinhui , "linux-kernel@vger.kernel.org" , "linux-arch@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , Adam Wallis , Andrew Pinski , Arnd Bergmann , Catalin Marinas , Ingo Molnar , Jan Glauber , Mark Rutland , Pan Xinhui On Fri, May 05, 2017 at 01:53:03PM +0200, Peter Zijlstra wrote: > On Thu, May 04, 2017 at 11:28:09PM +0300, Yury Norov wrote: > > I don't think > > it's a real use case to have ticket spinlocks and queued rwlocks > > There's nothing wrong with that combination. In fact, we merged qrwlock > much earlier than qspinlock. ... and that's almost certainly the direction we'll go on arm64 too, not least because the former are a lot easier to grok. Will