From mboxrd@z Thu Jan 1 00:00:00 1970 From: Leonid Yegoshin Subject: Re: [v3,11/41] mips: reuse asm-generic/barrier.h Date: Wed, 13 Jan 2016 12:58:22 -0800 Message-ID: <5696BA6E.4070508@imgtec.com> References: <1452426622-4471-12-git-send-email-mst@redhat.com> <56945366.2090504@imgtec.com> <20160112092711.GP6344@twins.programming.kicks-ass.net> <20160112102555.GV6373@twins.programming.kicks-ass.net> <20160112104012.GW6373@twins.programming.kicks-ass.net> <20160112114111.GB15737@arm.com> <569565DA.2010903@imgtec.com> <20160113104516.GE25458@arm.com> <56969F4B.7070001@imgtec.com> <20160113204844.GV6357@twins.programming.kicks-ass.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20160113204844.GV6357@twins.programming.kicks-ass.net> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: Peter Zijlstra Cc: linux-mips@linux-mips.org, linux-ia64@vger.kernel.org, "Michael S. Tsirkin" , Will Deacon , virtualization@lists.linux-foundation.org, "H. Peter Anvin" , sparclinux@vger.kernel.org, Ingo Molnar , linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, Russell King - ARM Linux , user-mode-linux-devel@lists.sourceforge.net, linux-sh@vger.kernel.org, Michael Ellerman , x86@kernel.org, xen-devel@lists.xenproject.org, Ingo Molnar , Paul McKenney , linux-xtensa@linux-xtensa.org, james.hogan@imgtec.com, Arnd Bergmann , Stefano Stabellini , adi-buildroot-devel@lists.sourceforge.net, ddaney.cavm@gmail.com, Thomas Gleixner , linux-metag@vger.kernel.orgli List-Id: linux-arch.vger.kernel.org On 01/13/2016 12:48 PM, Peter Zijlstra wrote: > On Wed, Jan 13, 2016 at 11:02:35AM -0800, Leonid Yegoshin wrote: > >> I ask HW team about it but I have a question - has it any relationship with >> replacing MIPS SYNC with lightweight SYNCs (SYNC_WMB etc)? > Of course. If you cannot explain the semantics of the primitives you > introduce, how can we judge the patch. > > You missed a point - it is a question about replacement of SYNC with lightweight primitives. It is NOT a question about multithread system behavior without any SYNC. The answer on a latest Will's question lies in different area. - Leonid. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mailapp01.imgtec.com ([195.59.15.196]:29107 "EHLO mailapp01.imgtec.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758803AbcAMU62 (ORCPT ); Wed, 13 Jan 2016 15:58:28 -0500 Message-ID: <5696BA6E.4070508@imgtec.com> Date: Wed, 13 Jan 2016 12:58:22 -0800 From: Leonid Yegoshin MIME-Version: 1.0 Subject: Re: [v3,11/41] mips: reuse asm-generic/barrier.h References: <1452426622-4471-12-git-send-email-mst@redhat.com> <56945366.2090504@imgtec.com> <20160112092711.GP6344@twins.programming.kicks-ass.net> <20160112102555.GV6373@twins.programming.kicks-ass.net> <20160112104012.GW6373@twins.programming.kicks-ass.net> <20160112114111.GB15737@arm.com> <569565DA.2010903@imgtec.com> <20160113104516.GE25458@arm.com> <56969F4B.7070001@imgtec.com> <20160113204844.GV6357@twins.programming.kicks-ass.net> In-Reply-To: <20160113204844.GV6357@twins.programming.kicks-ass.net> Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-arch-owner@vger.kernel.org List-ID: To: Peter Zijlstra Cc: Will Deacon , "Michael S. Tsirkin" , linux-kernel@vger.kernel.org, Arnd Bergmann , linux-arch@vger.kernel.org, Andrew Cooper , Russell King - ARM Linux , virtualization@lists.linux-foundation.org, Stefano Stabellini , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Joe Perches , David Miller , linux-ia64@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-metag@vger.kernel.org, linux-mips@linux-mips.org, x86@kernel.org, user-mode-linux-devel@lists.sourceforge.net, adi-buildroot-devel@lists.sourceforge.net, linux-sh@vger.kernel.org, linux-xtensa@linux-xtensa.org, xen-devel@lists.xenproject.org, Ralf Baechle , Ingo Molnar , ddaney.cavm@gmail.com, james.hogan@imgtec.com, Michael Ellerman , Paul McKenney Message-ID: <20160113205822.t14CyW1Ur--4FAqllElblmGUU6mCF2Y3_qUpJWvitQI@z> On 01/13/2016 12:48 PM, Peter Zijlstra wrote: > On Wed, Jan 13, 2016 at 11:02:35AM -0800, Leonid Yegoshin wrote: > >> I ask HW team about it but I have a question - has it any relationship with >> replacing MIPS SYNC with lightweight SYNCs (SYNC_WMB etc)? > Of course. If you cannot explain the semantics of the primitives you > introduce, how can we judge the patch. > > You missed a point - it is a question about replacement of SYNC with lightweight primitives. It is NOT a question about multithread system behavior without any SYNC. The answer on a latest Will's question lies in different area. - Leonid.