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McKenney" , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Uladzislau Rezki , Mathieu Desnoyers , Lai Jiangshan , Zqiang , Tejun Heo , Andrew Morton , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Johannes Weiner , Zi Yan , Anna-Maria Behnsen , Ingo Molnar , Shuah Khan , linux-kernel@vger.kernel.org, rcu@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH 01/15] sched/isolation: Support dynamic allocation for housekeeping masks Message-ID: References: <20260325-dhei-v12-final-v1-0-919cca23cadf@gmail.com> <20260325-dhei-v12-final-v1-1-919cca23cadf@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20260325-dhei-v12-final-v1-1-919cca23cadf@gmail.com> X-Rspamd-Server: rspam12 X-Stat-Signature: se1gh6ued6357uiusnyqzjn4ofyhmkxy X-Rspamd-Queue-Id: ECBDC1C0002 X-Rspam-User: X-HE-Tag: 1774949509-553408 X-HE-Meta: U2FsdGVkX18ML8EarCk4ahfgJqrok7IQTpbzVkjAY9u2Gf4FLSOamS+WDTdqT2I+Gn7bgV8vyX3Z5R9pzYG64BmcIUQ+IsR+TnUUx4yFvOBC9O18YfwZIvhJy2dn7oiiWFZAYCExS1ofyyaBvAiB/c3oRKgR7utwZHrDPcCO9vqo8C44URgO+SSksFeuOPQvK92NifSba40gzNsjyt4kMGPNDg+A4ZdOu9MEgG1wpzV8f47BUsLQ5r1TtgKXAZurRKI7xZkZp0ocXriDW4EK20dxRFU8p5esFgyUgr6CMlMhSeqUWDoqm8LyaHirtn/GyNG3dvgDYylLyWETW+rf3aB5RnOM/xQLyI9ttqgZCshYBe1AqOYBS2B3+28gms1CP2X0AK7jOJ6ADZzvxum00kwOj66MPdx8crph44BN1OjWFlG0yxsMTPnuN34rDqrQqg/ZYoWfq/OW+DLc4oCAAQ09sbI+8RmKgoJdXT0xXJ/QnnWC6KBfEY4ZELcepKhG8i9rlbj4jCebrOM+nko7lK2AdYacpy4bpvYP6+1Y6uZLvjm6I7WWPvUBZeQJ6fUZIryD9OJccROVrat5nmIznkmsBJHntsPmYwkSW8cdQC9VxNQoxNdhtiiGeSG/G8OwUUIKGoxys7B/bCK1id/8g94nWG0lTqfJqoqkqPaZ7uYMtJD5pRURwnLek9t/j3Mb4cPls4VtyzC30HtJpnybhYeBtwwNJLOT9zmLSxH/0iwLAcMSMsnLTN3VqdPBRGnX0GfKFG86ey8wRnE0vyAoZq/NBQ32/qx23duOI8/BLBF5f6f1Vtpd3aD4pinsq5IqB9WiWSh8y+rerRQ+ywrCHZvUz6tXjpmQoobp9j7nipkSQRRHABmFzUYSFmYhRqB9lpBVpPwUsEkjUfn8u94LGvGeWKtl44j8GUinWxikpL3bQQbR5jpp97TebeypZdxo8zg9UCKKf2ktlApGAJQ a0Gp5q9M CZAqnnt68ix1hpaIllngeXvsY/xVWpJXVzmM647VurdRMZYzyJ0KJPOjLRHNrPzlqEFMcsjosvPfM65/bVUKr4/bd5H1n+WhNsPtia0NW9AZ4ycnaywyuhyoIbmjC6ZbZ5J5+j4lGhUJEzqCxDdHJtKMjvlAk4i/lR+54LeULk6K8V+5dkL4q/fVTnz4vh8j6+WKD6bbwI2XFSigAG0ziJNnEu1x+dCBz+bG9WibzGUK6BrueidO8XXFTD52gaky+HrHPcl/Mh/YkE//LB/fKwO91BqPbkIPRN8gqw8HTQmHTjWutFCNeGaWnQpwLSKOj9OfLTx+KdF4jkRQ= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi, Le Wed, Mar 25, 2026 at 05:09:32PM +0800, Qiliang Yuan a écrit : > The existing housekeeping infrastructure uses a single static cpumask > for all isolation types. This prevents independent runtime > reconfiguration of different services (like RCU vs. timers). > > Introduce dynamic allocation for housekeeping masks to support DHEI. > > This allows subsequent patches to manage service-specific masks > independently at runtime. > > Signed-off-by: Qiliang Yuan Have a look at housekeeping_update(), it should provide the basis for what you want. But I think Waiman is already working on making nohz_full dynamically configurable. Thanks. -- Frederic Weisbecker SUSE Labs