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McKenney" , Frederic Weisbecker , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Uladzislau Rezki , Mathieu Desnoyers , Lai Jiangshan , Zqiang , 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 00/15] Implementation of Dynamic Housekeeping & Enhanced Isolation (DHEI) Message-ID: References: <20260325-dhei-v12-final-v1-0-919cca23cadf@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260325-dhei-v12-final-v1-0-919cca23cadf@gmail.com> X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 494EA100014 X-Stat-Signature: pojd6sh8grsramo61ahknrmc9dtg9er9 X-HE-Tag: 1774454573-745711 X-HE-Meta: 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 ukyglPcj BK9T7NqJ183Awwlar5IendMw0UIVtJnWYbjs70SgmxeNz+C+T2vkbuBIn/LoWV2Hfw9pUQv1mPYPQ0FgUXLcN/KvHeF0rH9yb3mQK4/4wkmQE+O3wNrPDonpk1Q4ViWxQ5rx+PUxPghDSGb16OQc9TP9mQBuzkSLjduclyT4oV37NOi/Xvd+IqNEknir0cpS08y6F+CkjxOoLZFftg2w3caTVFyCSNLIR3KlXl/alg/lPUqR7xjM5XyjGn6TfS7W7+q342qfhAV5rRB7fHLeoUYxvLyMWrkDNVX41 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Mar 25, 2026 at 05:09:31PM +0800, Qiliang Yuan wrote: > The Linux kernel provides mechanisms like 'isolcpus' and 'nohz_full' to > reduce interference for latency-sensitive workloads. However, these are > locked behind the "Reboot Wall" - they can only be configured via boot > parameters and require a system restart for changes to take effect. > > In modern cloud-native environments, CPU resources often need to be > dynamically re-partitioned to accommodate container scaling without > the performance penalty and downtime of a full system reboot. Similarly, > high-frequency trading (HFT) platforms require the ability to fine-tune > CPU isolation at runtime to minimize jitter for critical execution threads > based on shifting market demands. > > This patch series introduces Dynamic Housekeeping & Enhanced Isolation > (DHEI). DHEI allows administrators to reconfigure the kernel's > housekeeping boundaries at runtime via a new sysfs interface at > /sys/kernel/housekeeping/. I think I asked for this in the previous thread but please coordinate with existing cpuset and isolation mechanisms. You aren't even cc'ing Waiman for cpuset. Thanks. -- tejun