From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out30-133.freemail.mail.aliyun.com (out30-133.freemail.mail.aliyun.com [115.124.30.133]) (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 96B3033CA for ; Thu, 14 Nov 2024 07:47:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731570436; cv=none; b=TMrItVobS/qSGftghP7F3Y35oiDueaLrp4z+uLQJYPUz2Ltt937yA4NouFgpGKFi+Ubxydm7VOQ4STffwr8rHpguOWvD51tNwg+PFJOeNQUu3zvffDt5Bcrvt05MWaCcAIF/zDCW35mG3oAfIeP7rdThcw6ds/qFZYYCzgVH6Kk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731570436; c=relaxed/simple; bh=RtCLtwC7P03ol1dmUwrxf+F2OSpDZAAvIDxTgX9ICdU=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=YpuKRSvfgfN8U+67JId8QLNBAKmhINeqGoR+eH4FIqONEZ6FNRbNioG48BO/f3+eTeF7grUQAx/ZevIgBiztR/8ac6EseRIW+lQE9p/oLoXiNw67jcR+O9J2A/Z8rOIBPhzUJie8hajT232zow4SDWKvcaY182pH6m01lma6rK8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b=o87d1ict; arc=none smtp.client-ip=115.124.30.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="o87d1ict" DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1731570431; h=Message-ID:Date:MIME-Version:Subject:To:From:Content-Type; bh=Rv+9oFq6sE3dFxVOCJUt/7Fkb0yiXB0UVjn4Zmv5PR0=; b=o87d1ictL2f0xQQDC7jywsHvXO7/qfY5DC71THFmiGEbt3hQbV/Z1N9L8pWx74LyHdIZH3+WfvafhvglTEtgg4zQR8lpEgD1YQT8GfpaZjpfXOd+DTZt9yYqrFMTJ+DlPStD9q8zofz2ZvRqlT+oWz/0uRW9xGaw3QPuHIbTZGE= Received: from 30.74.129.177(mailfrom:dtcccc@linux.alibaba.com fp:SMTPD_---0WJNns1t_1731570429 cluster:ay36) by smtp.aliyun-inc.com; Thu, 14 Nov 2024 15:47:10 +0800 Message-ID: <1d2ad284-c887-4377-9512-a74dc418efa1@linux.alibaba.com> Date: Thu, 14 Nov 2024 15:47:09 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] sched/eevdf: Force propagating min_slice of cfs_rq when a task changing slice To: =?UTF-8?B?6KejIOWSj+aihQ==?= Cc: Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , "linux-kernel@vger.kernel.org" References: <20241028063313.8039-2-dtcccc@linux.alibaba.com> <20241031094822.30531-1-dtcccc@linux.alibaba.com> <2c4654d1-f212-43ac-abf9-de6d08c85387@linux.alibaba.com> Content-Language: en-US From: Tianchen Ding In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 2024/11/14 15:33, 解 咏梅 wrote: > delayed dequeue is nessary for eevdf to maintain lag. Paw’s relative vruntime is > not necessary any more in migration path. > > > it is not a tuning option. > > regards, > Yongmei I don't know why you so focus on DELAY_DEQUEUE, it is not related to the case I explained. The case is about cgroup hierarchy. And the task_A in my case is already blocked and *out of rq* I'm talking about its enqueue path when woken up.