From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f176.google.com (mail-pf1-f176.google.com [209.85.210.176]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 12DA226E165 for ; Wed, 23 Apr 2025 11:27:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.176 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745407630; cv=none; b=SELF8H3GJsSmBjsK9fzPbt4rNJNxCl1JcV0v4QGn6ecb+MbAnc7Wto4KT81gCHpb+chBkiwwo8Vk91/bSG5ODMgyANlY0OuujJ7rLLYo15dMGEZ1YGJSgQKqp3lgN7TxRxtEAPj4DOG7oRyH9xU22bJgGRBpBtVWO3T+ZkBRZjI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745407630; c=relaxed/simple; bh=GWNbt0uc23Fp+9BMPaj9zqpdLZ08H6PPR/SOhlJgWdE=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=E/TloqGRaotE6TarZiIajdXS4MyCnRoHXoZege8qNRIPKP9O+joZijkvTITGCVDAK+vssmwDWyzytdkcruUkNMiBVGaRTRMra0h+dsiC/+UWhN3RI7kFE0u7ZHgO0r3GRNh6qF6q15WA0WvJDvKpnIFBJSnIVRCLqYd5E5KJxCA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=bytedance.com; spf=pass smtp.mailfrom=bytedance.com; dkim=pass (2048-bit key) header.d=bytedance.com header.i=@bytedance.com header.b=bf8EbgLH; arc=none smtp.client-ip=209.85.210.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=bytedance.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bytedance.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bytedance.com header.i=@bytedance.com header.b="bf8EbgLH" Received: by mail-pf1-f176.google.com with SMTP id d2e1a72fcca58-736e52948ebso7231861b3a.1 for ; Wed, 23 Apr 2025 04:27:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1745407627; x=1746012427; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=Lqfsiipj1zIG3B0OdcMsXHIIVUkLBUUNgQuy45j+4Yo=; b=bf8EbgLHJbz+tGoEVD0oVFtmhFROsM5d7Xs57IFm6dvaDrDocrlXW14Pl2hq55uI7K j1qHr25KI8t1eIBPvvURTzxKaxmFVT1Y5kb+ptQAnOi4WYmWc6k70lN9R9ZycBVXptFA QqrXrC1lsLuiQNIcKKUv1/PGFs8Rj4d22mDJrLEPj76CLJ+qLmd8dqkA8jsJ5gF/e9MX ODPxY3XYsCMGC6zqtFKc/WuoA9lB53vzehRV0t++S1UK0+ZnLd5A9aKyEtigiNcruX9E D/qwP1s52Icc62iyiCM4X0U4gBsGGbGwsb3OArDOoeH7Ku5KHTLM7sDv2QRXymq3BvG7 RizQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1745407627; x=1746012427; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=Lqfsiipj1zIG3B0OdcMsXHIIVUkLBUUNgQuy45j+4Yo=; b=tamNusFCa+KFiImjQXesGQzxdFNUsxeW2zUMMhJBi5aBP6vhs+gTQ5CuwYRZvJ6Jra /PjlS8mMRnYJutKOOpX+GDWKZ0YD54QYUCA8gH7bCX92C6rf1fEeHJdK8i7D5X5xoGqA ndo/JfnZvLVQdtjqO8K/He6E5xsroxUJc2OJygygzam31/zjrYJLyu1VVfXhabLoFsRH i26JAQ1tnvmI/0THARqgi1YahlwuW7QwN5cq4q5EBZlctQ1sP+whOkHbiduEl70TaC03 jb3gr/2mMgDvhXxbtZWPLa4ln4apHBYJbrbW1dXzsaqLfZQQ1F4L1fLwDQSLPNcFinIY gMxA== X-Forwarded-Encrypted: i=1; AJvYcCVFsGAGLlCwAABIi9+d+lXl3SihRVc3RyyRM72OR9vrLUT12aJfAv+fKV4/bXbpTKTS1wNQVImgqbCVOVI=@vger.kernel.org X-Gm-Message-State: AOJu0YxwjlBbq0FhHSzLoOpL6iJZgqI+4Gyki1AFGt+feg/SsfPoz5P0 iffmSOZx9WY9CO+ct2AueHqHMlSCaa6QenD0wy3gisZrNWl2XtJZrBbEohhX6g== X-Gm-Gg: ASbGncvjiGC4KLl3j7YF9zxCsgAHW8Oh6I0MamvGBae3y7nPik+B7n0Nzf57nddtAbv T86hiSSMTVwdjwp36Ow5Atfi6APhHNRJgkFjO/zEwFcsZhZfqW3Wltm8Ng6mlwK4+pnohvr1T1a 1yppn+Hbh2FrQ8Hkqt3sgbBITkR2STdcAbseAho4QzNqfnjjO3L9a6/wxH3USrxI4rMcolaoHRS rZ1/TIYm6I1o+AE/tgFhI93PGWcUCcq2EmE6wDX7Ch6ct5jHpRsv9v5Jp7Onc4z6rME3KP1NqMs FS1YP4xMCVKlauQRZmIbKcFkpP4p42BP+Ms8rjOF X-Google-Smtp-Source: AGHT+IHLRi6fszmZI3pApX59BjCB1oFpUKlFtQbO4Ws8sJOQw90F+RI5SOh0oOPu4cYVpPjgDmk/Zg== X-Received: by 2002:a05:6a00:3928:b0:737:6e1f:29da with SMTP id d2e1a72fcca58-73dc15c48f7mr27748930b3a.21.1745407627077; Wed, 23 Apr 2025 04:27:07 -0700 (PDT) Received: from bytedance ([115.190.40.13]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-73dbfa588d4sm10691048b3a.96.2025.04.23.04.27.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Apr 2025 04:27:06 -0700 (PDT) Date: Wed, 23 Apr 2025 19:26:51 +0800 From: Aaron Lu To: Florian Bezdeka Cc: Valentin Schneider , Ben Segall , K Prateek Nayak , Peter Zijlstra , Josh Don , Ingo Molnar , Vincent Guittot , Xi Wang , linux-kernel@vger.kernel.org, Juri Lelli , Dietmar Eggemann , Steven Rostedt , Mel Gorman , Chengming Zhou , Chuyi Zhou , Jan Kiszka Subject: Re: [RFC PATCH v2 7/7] sched/fair: alternative way of accounting throttle time Message-ID: <20250423112651.GA437160@bytedance> References: <20250409120746.635476-1-ziqianlu@bytedance.com> <20250409120746.635476-8-ziqianlu@bytedance.com> <099db50ce28f8b4bde37b051485de62a8f452cc2.camel@siemens.com> <20250418031550.GA1516180@bytedance> <87776d335eec8fe02b29d96818fd5c2dde5ed7af.camel@siemens.com> 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: <87776d335eec8fe02b29d96818fd5c2dde5ed7af.camel@siemens.com> On Tue, Apr 22, 2025 at 05:03:19PM +0200, Florian Bezdeka wrote: ... ... > Right, I should have mentioned that crucial detail. Sorry. > > I ported your series to 6.14.2 because we did/do not trust anything > newer yet for testing. The problematic workload was not available in > our lab at that time, so we had to be very carefully about deployed > kernel versions. > > I'm attaching the backported patches now, so you can compare / review > if you like. Spoiler: The only differences are line numbers ;-) I didn't notice any problem regarding backport after a quick look. May I know what kind of workload triggered this warning? I haven't been able to trigger it, I'll have to stare harder at the code. Thanks, Aaron