From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4A67E456DF7 for ; Tue, 1 Sep 2026 07:55:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788249322; cv=none; b=BcYCWAdTQfUmGZop5Enan97sHsh5JY3AZpgODAln04VbQWXuhQikwFwHwKrnvtFDpBcOwxE7hJPAbPO66xFu4pbhb0BBMhCzbuHygzffdqcXySvyAoqIKIY8g1ZiZZ3SxeFHmYFnfU4a8RZ2+p2neWOKbt0u4Ua4+5TPDADmfPA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788249322; c=relaxed/simple; bh=uBjM/K/26wCBzpdKpWc+Hp5EDZGObDeuCaNaSLPt4hI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=lYjNenJmzM7N6gXajSOZQbiUrdZWov11OsMF6OlK+CVmpg7nsQz58CIOmT1dEzvchqpwwwUocWxOOSS/yzHQc6KixI93YGrCYQzmDpjYHhyD7qjMlK7QBVPaEUCNZJyJdz3H/R2fb+OcwGoDV6vJBFewXuyautmCmCC3/Kbwd6c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=pass smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=Ty4geT8T; arc=none smtp.client-ip=90.155.92.199 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) header.d=infradead.org header.i=@infradead.org header.b="Ty4geT8T" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; 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=uBjM/K/26wCBzpdKpWc+Hp5EDZGObDeuCaNaSLPt4hI=; b=Ty4geT8TvA3szhsylN9HGz0LYG LFlRHkgLzaFbiHH6lmuUASPjLw7W38ndHLgZmJoxzl45s8GCauMRCBfATakBNFki8Cm8Cq09t+UII lXSvTx/uqvuH0/5qYbBxHlojYiMsfFKNe82G9rv+sz/y1zPHJXNsFz8Hu28G0kDsVoh8Epz3l+hgT 1p/F55rN5HrX+5i8Fa1aFXalPwdTjKzMxqNwMjwIqlRJb0wpiQYlwu5oR5faeweeeuLcdTHyGBKtP 4a0WvNbm6gWErWnAnNWjzA+fHKHesF6s1M/xWL0KXzsodlS6crB74Rh6sVbUaNnBfq8EJwxDsL7tt QvXmhm5w==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.99.2 #2 (Red Hat Linux)) id 1x1JKd-0000000AiYv-1nB5; Tue, 01 Sep 2026 07:55:00 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 916683002ED; Tue, 01 Sep 2026 09:54:57 +0200 (CEST) Date: Tue, 1 Sep 2026 09:54:57 +0200 From: Peter Zijlstra To: Jianyong Wu Cc: Ingo Molnar , Juri Lelli , Vincent Guittot , Chen Yu , Tim Chen , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , K Prateek Nayak , Shrikanth Hegde , Phil Auld , Andrew Morton , David Hildenbrand , linux-kernel@vger.kernel.org, linux-mm@kvack.org, jianyong.wu@outlook.com, zhongyuan@hygon.cn, huangsj@hygon.cn, wangfengyu@hygon.cn, yingzhiwei@hygon.cn, justin.he@arm.com Subject: Re: [RFC PATCH v2 09/23] sched/cache: Account percpu sd task NUMA preference Message-ID: <20260901075457.GO4120091@noisy.programming.kicks-ass.net> References: <20260827122816.756234-1-wujianyong@hygon.cn> <20260827122816.756234-10-wujianyong@hygon.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260827122816.756234-10-wujianyong@hygon.cn> On Thu, Aug 27, 2026 at 08:28:02PM +0800, Jianyong Wu wrote: > Account for per-NUMA task count preferences within per-CPU sched domains, > mirroring the existing implementation of LLC task preference logic. So in general I would really appreciate a few words on *why* you're doing things. I mean, I can read the patch and see what it does, but I cannot divinate (esp. not without yet having read the rest of the patches) why you're doing things. This is esp. important for large series -- or series that do complicated things -- or like this case: both!