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a=rsa-sha256; c=relaxed/relaxed; d=stgolabs.net; s=dreamhost; t=1730080935; bh=u9dgxPjngV31fQs5HEB/z4Keu+xsVZ4WEEml2hZEcz8=; h=Date:From:To:Cc:Subject:Content-Type; b=lGtpDk27ag5i/FvKyjDUqPeM+JO1oVBUL4eWE8Za1en3KJ7RkdOcReHH7mkcH+aJB fWxJUY4hSHELRJOHpI9zkwUEh9lkAjxppO1xjQmie9dk7Dd8E1r/okUhFEyZdZujz1 6ePlrmnz3usmroo7g9aUr/oiiKJwtMh5Y6eGUI5xOR1DwEGHUu1SDBIxFKZufEwqyo TkJGAXSTlXXHsnq5FnYi0lpJbIjNhbi41W/Zy547Tqi/y9tSwI71iRPQzfm6s3lC6n SE5uNCF3Brj+6OSF8+eWOFWVTxIgxUWQOAcBGmtzvH29KDOxX0bHdidV19tfGkqWvB +mP84MGTDol3w== Date: Sun, 27 Oct 2024 18:59:13 -0700 From: Davidlohr Bueso To: "Christoph Lameter (Ampere)" Cc: Peter Zijlstra , tglx@linutronix.de, linux-kernel@vger.kernel.org, mingo@redhat.com, dvhart@infradead.org, 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, llong@redhat.com Subject: Re: [PATCH 2/6] futex: Implement FUTEX2_NUMA Message-ID: Mail-Followup-To: "Christoph Lameter (Ampere)" , Peter Zijlstra , tglx@linutronix.de, linux-kernel@vger.kernel.org, mingo@redhat.com, dvhart@infradead.org, 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, llong@redhat.com References: <20241025090347.244183920@infradead.org> <20241025093944.485691531@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20240425 X-Stat-Signature: ua9zd8r7u76c7aj85f3ea69tfkguuqt6 X-Rspamd-Queue-Id: 6575A40025 X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1730080918-71088 X-HE-Meta: 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 lLQ/Hbkm rTCgbYxdwET5Sf0sGCDV9DcC4kPBNg+ONgbbQEZVzet55mzWCI/if+AmAcKQlclnMYWvf1Fy+2RWdQzUQpR2degVUye1EJ6UriaZXLcR8XXEMOn/KAtG5bWXGpLNXjBufPKvwiYXqkBEy8qnBmO98zqrhzDbEgZuZ3B6Ui8ur6+NcE7CxsimuE/VKMld9eOxOAimdF2JrPu5sgz0VvL9scXGbNQv7OBgjF4QYTLWxtagowmxQ8Uw6OuYr5bpsuRNCFdUkenrkUiQjBaodZXCAxci3JBR7N1vhxyZy/cNouvppQB75+erSxF9ySiydil6Kg6twf0iB16ZPhy3SAmwdxq0BLA== 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: List-Subscribe: List-Unsubscribe: On Fri, 25 Oct 2024, Christoph Lameter (Ampere) wrote:\n >Would it be possible to follow the NUMA memory policy set up for a task >when making these decisions? We may not need a separate FUTEX2_NUMA >option. There are supportive functions in mm/mempolicy.c that will yield >a node for the futex logic to use. With numa-awareness, when would lookups ever want to be anywhere but local? mempolicy is about allocations, futexes are not that.