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[106.167.137.155]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-21177e6a471sm60430325ad.233.2024.11.10.07.17.55 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 10 Nov 2024 07:17:59 -0800 (PST) Message-ID: Date: Mon, 11 Nov 2024 00:17:54 +0900 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Akira Yokosawa Subject: Re: [PATCH v4 0/5] tools/memory-model: Define more of LKMM in tools/memory-model To: paulmck@kernel.org, luc.maranget@inria.fr Cc: stern@rowland.harvard.edu, parri.andrea@gmail.com, will@kernel.org, peterz@infradead.org, boqun.feng@gmail.com, npiggin@gmail.com, dhowells@redhat.com, j.alglave@ucl.ac.uk, dlustig@nvidia.com, joel@joelfernandes.org, urezki@gmail.com, quic_neeraju@quicinc.com, frederic@kernel.org, linux-kernel@vger.kernel.org, lkmm@lists.linux.dev, hernan.poncedeleon@huaweicloud.com, Jonas Oberhauser , Akira Yokosawa References: <20240930105710.383284-1-jonas.oberhauser@huaweicloud.com> <70907739-56b9-4712-a1db-e55161c2a8d6@paulmck-laptop> Content-Language: en-US In-Reply-To: <70907739-56b9-4712-a1db-e55161c2a8d6@paulmck-laptop> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Hi Paul and Luc, On Mon, 28 Oct 2024 13:16:23 -0700, Paul E. McKenney wrote: > On Mon, Sep 30, 2024 at 12:57:05PM +0200, Jonas Oberhauser wrote: [...] >> This second step (comprising patches 4 and 5) is incompatible with the >> current herd7 implementation, since herd7 uses hardcoded tag names to decide >> what to do with LKMM; therefore, the newly introduced syntactic tags will be >> ignored or processed incorrectly by herd7. > > Thank you, Jonas! > > Queued for further review and testing. This does need at least an ack to > proceed to mainline (hint to LKMM maintainers). Paul's lkmm.2024.11.09a branch carries these 7 commits: 1 tools/memory-model: Add atomic_and()/or()/xor() and add_negative 2 tools/memory-model: Add atomic_andnot() with its variants 3 tools/memory-model: Legitimize current use of tags in LKMM macros 4 tools/memory-model: Define applicable tags on operation in tools/... 5 tools/memory-model: Define effect of Mb tags on RMWs in tools/... 6 tools/memory-model: Switch to softcoded herd7 tags 7 tools/memory-model: Distinguish between syntactic and semantic tags As the first commit is already incompatible with released versions of herd7, Paul will have nothing to upstream for v6.13 unless we see a new release of herdtoolds7 whose herd7 has those atomic RMW bitwise ops and lkmmv2 variant support in time for the upcoming merge window. Luc, I have no idea of herdtools7's release procedure, but is there any chance for us to see such a release of herdtools7, preferably by the end of November? Thanks, Akira