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Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.100.1 #2 (Red Hat Linux)) id 1xLzpF-00000002RUY-45tI; Wed, 28 Oct 2026 09:20:06 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id D1BE830120E; Wed, 28 Oct 2026 10:20:04 +0100 (CET) Date: Wed, 28 Oct 2026 10:20:04 +0100 From: Peter Zijlstra To: Li Zhe , bharata@amd.com Cc: akpm@linux-foundation.org, bsegall@google.com, david@kernel.org, dietmar.eggemann@arm.com, gourry@gourry.net, joshua.hahnjy@gmail.com, juri.lelli@redhat.com, kprateek.nayak@amd.com, ljs@kernel.org, mgorman@suse.de, mingo@redhat.com, riel@redhat.com, rostedt@goodmis.org, vincent.guittot@linaro.org, vschneid@redhat.com, ziy@nvidia.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH v2 0/3] sched/numa: refine memory tiering promotion heuristics Message-ID: <20261028092004.GG2668804@noisy.programming.kicks-ass.net> References: <20261028041253.74839-1-lizhe.67@bytedance.com> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261028041253.74839-1-lizhe.67@bytedance.com> X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: DE9CEA0009 X-Stat-Signature: 8ew6cx7d6rio9uyocz16kjq6ujjkpqyq X-Rspam-User: X-Spam-Status: No, score=-3.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_PASS,SPF_PASS autolearn=no autolearn_force=no version=4.0.1 X-HE-Tag: 1793179211-280780 X-HE-Meta: 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 SbIjO+aH iLYU4lTx73B/0CSkAPLMhps5+Pk5ZDVfTx7eBnoO0wCn7kxIiH2L8ARChTNkq+98TvsI14/CgixuJ0WXxkS682P7n0W4CDCtpTU1O9zMgnb98y9gDqUzgwnAuiaPkZbK/uRAdkVCDLQiZbGxHMtMtMVe1SBvvE3mSylGL2+MYu486AR9SJA84wUT4RykJNAmEmD8NnOM1vEVEfE0IZd3cMJvCXDxxKvoqZYUbOijPUEH46bhRf1+TzFqz0Wzi3gOdf8B8GmC+4cBA//oYsfK5QoPNsg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Wed, Oct 28, 2026 at 12:12:50PM +0800, Li Zhe wrote: > This version narrows the series to memory tiering. The generic normal > NUMA balancing cleanups and heuristic changes from v1 are not included. Should we not look at Bharata's pghot stuff first and untangle this numa balancing vs tiering nonsense, before making an even bigger mess of things?