From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=90.155.50.34 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793179223; b=qbnfLGwKez6h2g8bSWBXDP7VxVMb7SgN951tUFHZAVPQaxc4aWI2fkWKNl3dEBQ/jjMg PF+IqnVqo6/0jUHWTh56oKXdkgahjFy8B5A4wxVW2T41eOrpLGM2DuXJC3zH/Mzeq1ttu Li4YWzchrO/My4ZgOzlzkQHnw4IbvGZKo/Na5iIe2WKevR1TJy7oL/TZoUc5jRMNbT5mc 3v6cMBUfu4QzUShEy3fhLwedpoa8g1tGM4QSE+fJ5I/IyR3v+C/04UsAOYMag5xtl6hyq xh2blLzOhJj+TvGwquDq9Str0kzC2SHw52jqSg64fe6SAY/jHGVHjonS4ElbY8aUQ8A== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793179223; h=DMARC-Filter:DKIM-Signature:Received:Received:Date:From:To:Cc: Subject:Message-ID:References:MIME-Version:Content-Type: Content-Disposition:In-Reply-To; bh=4ZFHM4+DLjyn47zDsovu4y4A00dH/kf24XvJgX5dD+w=; b=pEXJRBDs/uRksRlThk7y+I7lrgN1s+vkMCyenvVWVR6+75Jb2VZFV+aeVIuIIpnAlKmW G4FPA4Y87Sq8pe0rlnTLe2RxsvVYcqfmFvzEAIMp7rhCfn1ZP1eXXxzoejsDetXBCKMx3 doxejCWUeSrOU7VG54LXSq3dcOCgRHeSq0gVPRAkUec6MPR0DB7DLhZLKJ8C/oowBnDUo XImzrQKFH/CEWhxJ3tdftkq56bZXw4+KJAN7XRYz0xT6bcMENla5I+7yiSW9p+x7jkcs8 mTopJu8reTAJWpI5iYzzctucKpT7my0ucb8AAnyjKQ4dv3h0OT/S9gBfiocQduHj8xA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=infradead.org; spf=pass smtp.mailfrom=infradead.org; dkim=pass header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=casper.20170209 header.b=uHAG3HqB; arc=none smtp.remote-ip=90.155.50.34 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 10B20606A31D; Wed, 28 Oct 2026 09:20:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 10B20606A31D Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=casper.20170209 header.b=uHAG3HqB DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=4ZFHM4+DLjyn47zDsovu4y4A00dH/kf24XvJgX5dD+w=; b=uHAG3HqBdy5czMRd0B0gFKODf7 xEiO9EmxmA8jDbYlz6b9/g8ePrlc4NeMgIo0P7k07/aHHx5/5hcJFVfbJRREuWZXG28yVn7eBFeNx 1DN/Egp1H12OBO+Otyc/u2RrO9OSF1v2pjl1fluCLs885s0+Ua8hhOjyexusDFeiPPyskzUdnWPiK gSOs/YtbHExKIHNwb7OfIUwnEYeaZKeHB4H/ViBtKLcR1/LX0VL92nagvmTRTmQXZHjHY+kDdZKpW luQUeshAZcwlNW5Kc/VZ4xOqFtScOOXV7yXKj8uS+PAwN+b+wjUjHIT2VsH8gXk4BppopbuxL+a1u G0h+TG5A==; 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-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261028041253.74839-1-lizhe.67@bytedance.com> 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?