From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (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 4AF3418FDA5 for ; Tue, 10 Sep 2024 14:07:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725977270; cv=none; b=rTyiC64ZCyKAnbRJD7zOzBuNmoYOy0u0XGvrRUKcB8tWzGSKaDnKjY8BpRk2mM5eM+LPbiIVoFmUpB7NidOw8Ll0FBqO5SuwVrHrAed4/NlNvJhS92bdFWtBupPHnFELYPVSb1axPtN0w/GO2UBRi6weAM8jG3DkcvX0ac+UuIM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725977270; c=relaxed/simple; bh=GsP7IoiwUDr9UcK6IbeiWdY7W3PiWVr8OPurOzz8pJk=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=SC5mKhBU+Qh8sHvR7dz+GP6U2F1J5wDJ0y3Dkb1UnzJjjllvJ90Cn5BXEK32wuPn7PWFCBik8Ose7kSaOBhnQMA/YbyBH/lNpYEFaUg/qwSp99lPrTu6cbQj0dZeofG7e9s1xJbIoTDhbhYvlgMPG4xkhr2Rr6bCoS9S3WkM9NU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=XWakvYFs; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none 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="XWakvYFs" 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=qKnsH8PJo0Jfvw18PFXsJrHVQClZIwEJEimjaEeFq7E=; b=XWakvYFs3jsaKFbDtQBSpz94Vq 3BvXTqpGMGLkVIWPaebl8eAZWxtXaUoKeAy4CvixSF23p+z2OtRl1gkVvQRnVtgrxW+BjEKE+ebil W1Ol9YXt6JTmHCU7fTbbL9CSa3ZuCIOeUc6gVouCNWnuBFUjNpxn2QbfHCYbE8iZ8C08IisEU2dq4 qBW76U116xHK6fma6rll86PaGNTw6oquVqyy6n/Gb7+zx45QQFxl9jU1mImhmpSWZOpihkWRUujfO QcIOhgoGU8HXYg6h2NfvuP5kvQo28xImjfEDXHXC/+4QyDstLD/AYcm+HluMxWrOSQMRfMvU70dJz tT6q8PGQ==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.98 #2 (Red Hat Linux)) id 1so1Wt-0000000BdGT-23Qh; Tue, 10 Sep 2024 14:07:39 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 2126E30047C; Tue, 10 Sep 2024 16:07:39 +0200 (CEST) Date: Tue, 10 Sep 2024 16:07:39 +0200 From: Peter Zijlstra To: Sven Schnelle Cc: mingo@redhat.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, linux-kernel@vger.kernel.org, kprateek.nayak@amd.com, wuyun.abel@bytedance.com, youssefesmat@chromium.org, tglx@linutronix.de, efault@gmx.de Subject: Re: [PATCH 00/24] Complete EEVDF Message-ID: <20240910140739.GI4723@noisy.programming.kicks-ass.net> References: <20240727102732.960974693@infradead.org> 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: On Tue, Sep 10, 2024 at 02:21:05PM +0200, Sven Schnelle wrote: > Sven Schnelle writes: > > > Peter Zijlstra writes: > > > >> Hi all, > >> > >> So after much delay this is hopefully the final version of the EEVDF patches. > >> They've been sitting in my git tree for ever it seems, and people have been > >> testing it and sending fixes. > >> > >> I've spend the last two days testing and fixing cfs-bandwidth, and as far > >> as I know that was the very last issue holding it back. > >> > >> These patches apply on top of queue.git sched/dl-server, which I plan on merging > >> in tip/sched/core once -rc1 drops. > >> > >> I'm hoping to then merge all this (+- the DVFS clock patch) right before -rc2. > >> > >> > >> Aside from a ton of bug fixes -- thanks all! -- new in this version is: > >> > >> - split up the huge delay-dequeue patch > >> - tested/fixed cfs-bandwidth > >> - PLACE_REL_DEADLINE -- preserve the relative deadline when migrating > >> - SCHED_BATCH is equivalent to RESPECT_SLICE > >> - propagate min_slice up cgroups > >> - CLOCK_THREAD_DVFS_ID > > > > I'm seeing crashes/warnings like the following on s390 with linux-next 20240909: > > > > Sometimes the system doesn't manage to print a oops, this one is the best i got: > > > > [..] > > This happens when running the strace test suite. The system normaly has > > 128 CPUs. With this configuration the crash doesn't happen, but when > > disabling all but four CPUs and running 'make check -j16' in the strace > > test suite the crash is almost always reproducable. I noted: Comm: prctl-sched-cor, which is testing core scheduling, right? Only today I;ve merged a fix for that: c662e2b1e8cf ("sched: Fix sched_delayed vs sched_core") Could you double check if merging tip/sched/core into your next tree helps anything at all?