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 238383A8FF1 for ; Mon, 30 Mar 2026 09:43:18 +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=1774863801; cv=none; b=SrX6ElFnY5Ix12DVLu6cMmS+yQ6M75QJROQWcN/wtuwJMVC1lS0opEgM5mTh3Qv+yhg4vus0HdNYqOpn1SKzVXZlGTP50DL3lU7J7rJVFwkPDt3cUM2hnrhPuz7eAgoKItjtmkVdQBk4SvFNEsonKo8B366DGsDRJGR7AppLNmM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774863801; c=relaxed/simple; bh=W3y/vY+RIJeJjmR6A+Gy/9pP4yzPgEoqG18EfhXZowg=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=I3satPzgf1uY/7X23nNF9VLClnLh0R0ukD0U2A03YQktuSLWuw6OWsYkET42ZgymzPbZ5nVHkgZKYacHbTvz8Kw5tRAl/lv/wOVu+XlLP/UQbydSJzrbrMLUJW68aq/5br9SPrkTKm56WwiaTkPpcL16hRWZZ/voasQqwGNpX8Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (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=j6eUZ3+Z; 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=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="j6eUZ3+Z" 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=W3y/vY+RIJeJjmR6A+Gy/9pP4yzPgEoqG18EfhXZowg=; b=j6eUZ3+ZGT1jps5SnCTFwcf3zI al010A1nac8aXZm6O0HQta48r4p7kYctPm8XChJ8FAwTd//e9QOAO+Urc7B8Q76JzYld+uqbIDNl3 yWzOYGZ5Rxkeiy1UBK5bPAfw23zM+s132/7f4ieUm9mN5AG4TYIVXDl44t5wFObdktby3XxWY5j1O aQajlSZtZb4gNk5rytRqwNMI0oFeEesvl5TMlmQyeLaS5cZ/7TxWJ8vXLwyXqVWrhFTTg3DoG3mKZ 2kjuQU+PJS7H62Qy3miMrIa4Be68Bc73vNKDbDyXBNi9z/Uni2ZjHHf+rpK1ISlkdNhLOye5FUXKq TbXdaGWA==; 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 4.98.2 #2 (Red Hat Linux)) id 1w799F-0000000DT2g-0XtT; Mon, 30 Mar 2026 09:43:05 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 59D79301BD5; Mon, 30 Mar 2026 11:43:03 +0200 (CEST) Date: Mon, 30 Mar 2026 11:43:03 +0200 From: Peter Zijlstra To: John Stultz Cc: mingo@kernel.org, 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, wangtao554@huawei.com, quzicheng@huawei.com, kprateek.nayak@amd.com, dsmythies@telus.net, shubhang@os.amperecomputing.com, Suleiman Souhlal Subject: Re: [PATCH v2 1/7] sched/fair: Fix zero_vruntime tracking Message-ID: <20260330094303.GM3738786@noisy.programming.kicks-ass.net> References: <20260219075840.162631716@infradead.org> <20260219080624.438854780@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 Fri, Mar 27, 2026 at 10:44:28PM -0700, John Stultz wrote: > The backtrace is usually due to stress-ng stress-ng-yield test: What actual stress-ng parameters are that, and what kind of VM are you running?