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bh=MfahLn8s6IhKrFm2/ONalXKrUDG7t3dGqSRYFdbxHjo=; b=1u+B7186g20a/sFUuEcQVCD4kd6/uYDzvx8g4BxmBOBGMyvYUMjZo/BCQlwOSiIUvDEShf mhVcdNoI/SSYayloqQQFDB6nC22JotgtijV3v1zOuu389enmehsqcEEJx28Y8Ngd+DdwuD UOZu7fqRqDKiMNhRwlSGpkpDvbN8+52L+9GeJbUnrY58Hr0I81cBSXQlI6n1vYZRuar3gp 7pZ5iesfFJ+ta6ikoqBD1i5E5ZPcfWIwr96YHpfOFntVJo72RY4VnraTKpoE+p++eaMLYA ZzZc19esEGhB7/RpNYh3kpNsnlpg2siMOuu+5c1INnQsHmPk+e13mKI39fysIw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1691442924; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=MfahLn8s6IhKrFm2/ONalXKrUDG7t3dGqSRYFdbxHjo=; b=0t9vhDGSCYwDARIGa3FbeyGGLc0GJyr9iTmvx0l4EL+tilgY3jeXJatAK7JRcAmc0cgWp+ mqfm8Qxt2TXUmpAw== To: Peter Zijlstra , axboe@kernel.dk Cc: linux-kernel@vger.kernel.org, peterz@infradead.org, mingo@redhat.com, dvhart@infradead.org, dave@stgolabs.net, andrealmeid@igalia.com, Andrew Morton , urezki@gmail.com, hch@infradead.org, lstoakes@gmail.com, Arnd Bergmann , linux-api@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, malteskarupke@web.de Subject: Re: [PATCH v2 13/14] futex: Enable FUTEX2_{8,16} In-Reply-To: <20230807123323.641470179@infradead.org> References: <20230807121843.710612856@infradead.org> <20230807123323.641470179@infradead.org> Date: Mon, 07 Aug 2023 23:15:23 +0200 Message-ID: <87a5v2tuz8.ffs@tglx> MIME-Version: 1.0 Content-Type: text/plain X-Rspamd-Queue-Id: DC20AC0015 X-Rspam-User: X-Rspamd-Server: rspam04 X-Stat-Signature: 3jyt6wpjutau8tgk1j5cxhptckmkytf5 X-HE-Tag: 1691442925-810045 X-HE-Meta: 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 D4YqQge9 EOmVW32TKnjMWuP0aQ3lxPbmvi5ISW+yCHNq5H6VPPCVx1uVOV4uU5TKdHEJHCEvQubLQLsv2gdE8CAJ7t126DJXKFTnzJGIJ/FMu X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, Aug 07 2023 at 14:18, Peter Zijlstra wrote: > > /* > + * Encode the futex size in the offset. This makes cross-size > + * wake-wait fail -- see futex_match(). > + * > + * NOTE that cross-size wake-wait is fundamentally broken wrt > + * FLAGS_NUMA but could possibly work for !NUMA. Don't give people ideas :) Reviewed-by: Thomas Gleixner