From mboxrd@z Thu Jan 1 00:00:00 1970 From: Will Deacon Subject: Re: [v3,11/41] mips: reuse asm-generic/barrier.h Date: Wed, 27 Jan 2016 10:23:14 +0000 Message-ID: <20160127102313.GC2390@arm.com> References: <20160114212913.GF3818@linux.vnet.ibm.com> <569814F2.50801@imgtec.com> <20160114225510.GJ3818@linux.vnet.ibm.com> <20160115102431.GB2131@arm.com> <20160115175401.GW3818@linux.vnet.ibm.com> <20160115192845.GA12510@linux.vnet.ibm.com> <20160125144133.GB22927@arm.com> <20160126010646.GH4503@linux.vnet.ibm.com> <20160126121010.GD21553@arm.com> <20160126233733.GZ4503@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20160126233733.GZ4503@linux.vnet.ibm.com> Sender: linux-ia64-owner@vger.kernel.org To: "Paul E. McKenney" Cc: Leonid Yegoshin , Peter Zijlstra , "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.sourceforg List-Id: linux-arch.vger.kernel.org On Tue, Jan 26, 2016 at 03:37:33PM -0800, Paul E. McKenney wrote: > On Tue, Jan 26, 2016 at 12:10:10PM +0000, Will Deacon wrote: > > On Mon, Jan 25, 2016 at 05:06:46PM -0800, Paul E. McKenney wrote: > > > PPC WRCnf+addrs > > > "" > > > { > > > 0:r2=x; 0:r3=y; > > > 1:r2=x; 1:r3=y; > > > 2:r2=x; 2:r3=y; > > > c=a; d=b; x=c; y=d; > > > } > > > P0 | P1 | P2 ; > > > stw r3,0(r2) | lwz r8,0(r2) | lwz r8,0(r3) ; > > > | stw r2,0(r8) | lwz r9,0(r8) ; > > > exists > > > (1:r8=y /\ 2:r8=x /\ 2:r9=c) > > > > Agreed. > > OK, thank you! Would you agree that it would be good to replace the > current xor-based fake-dependency litmus tests with tests having real > dependencies? Yes, because it would look a lot more like real (kernel) code. Will From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from foss.arm.com ([217.140.101.70]:51397 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751321AbcA0KXV (ORCPT ); Wed, 27 Jan 2016 05:23:21 -0500 Date: Wed, 27 Jan 2016 10:23:14 +0000 From: Will Deacon Subject: Re: [v3,11/41] mips: reuse asm-generic/barrier.h Message-ID: <20160127102313.GC2390@arm.com> References: <20160114212913.GF3818@linux.vnet.ibm.com> <569814F2.50801@imgtec.com> <20160114225510.GJ3818@linux.vnet.ibm.com> <20160115102431.GB2131@arm.com> <20160115175401.GW3818@linux.vnet.ibm.com> <20160115192845.GA12510@linux.vnet.ibm.com> <20160125144133.GB22927@arm.com> <20160126010646.GH4503@linux.vnet.ibm.com> <20160126121010.GD21553@arm.com> <20160126233733.GZ4503@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160126233733.GZ4503@linux.vnet.ibm.com> Sender: linux-arch-owner@vger.kernel.org List-ID: To: "Paul E. McKenney" Cc: Leonid Yegoshin , Peter Zijlstra , "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 Message-ID: <20160127102314.-S9BqEnPiUFsZtcUOb0AzTPtXfyV5VPdIn4YKV8hceE@z> On Tue, Jan 26, 2016 at 03:37:33PM -0800, Paul E. McKenney wrote: > On Tue, Jan 26, 2016 at 12:10:10PM +0000, Will Deacon wrote: > > On Mon, Jan 25, 2016 at 05:06:46PM -0800, Paul E. McKenney wrote: > > > PPC WRCnf+addrs > > > "" > > > { > > > 0:r2=x; 0:r3=y; > > > 1:r2=x; 1:r3=y; > > > 2:r2=x; 2:r3=y; > > > c=a; d=b; x=c; y=d; > > > } > > > P0 | P1 | P2 ; > > > stw r3,0(r2) | lwz r8,0(r2) | lwz r8,0(r3) ; > > > | stw r2,0(r8) | lwz r9,0(r8) ; > > > exists > > > (1:r8=y /\ 2:r8=x /\ 2:r9=c) > > > > Agreed. > > OK, thank you! Would you agree that it would be good to replace the > current xor-based fake-dependency litmus tests with tests having real > dependencies? Yes, because it would look a lot more like real (kernel) code. Will