From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qv1-f49.google.com (mail-qv1-f49.google.com [209.85.219.49]) (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 7DE1026FA7B for ; Mon, 4 Aug 2025 13:32:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.49 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754314369; cv=none; b=pvU8h67LkMSC+i/gc69umwcaaNtSyroCwxbrIx12HZAgBD4fxUT1/YJ3RuXGXsi2/zDTxtCZ5eCOKIcFfDvm4NVLC51jrdzoFnqRana8fS+zoBr49MXEzu0+vwGVoDJiy9l7tof6NmErssHSDlEM6/+utT1Gn9dGaPctHIy/JZc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754314369; c=relaxed/simple; bh=c2zZubdYruK/gDLxhJT/Dee+/3njse4nUBcteSLRYms=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=AtqYEmvPI8mH8Ga4yRYqZpRZFhsB6/Il1eTsTOosPiWCKeYHcslGkHRVO71/ZD15erH1UGcA8zRJRa2EIIZUWGAtZtcUIFQbnm8wgg13MpysagWB4I32iwXWeV+nyDjj4RrH4PaRTaOa95sXjumwp+zxHZzGW9ZABnRqjCQI198= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=cmpxchg.org; spf=pass smtp.mailfrom=cmpxchg.org; dkim=pass (2048-bit key) header.d=cmpxchg-org.20230601.gappssmtp.com header.i=@cmpxchg-org.20230601.gappssmtp.com header.b=mLbAN61t; arc=none smtp.client-ip=209.85.219.49 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=cmpxchg.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=cmpxchg.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=cmpxchg-org.20230601.gappssmtp.com header.i=@cmpxchg-org.20230601.gappssmtp.com header.b="mLbAN61t" Received: by mail-qv1-f49.google.com with SMTP id 6a1803df08f44-7075bcdbb0fso19683726d6.0 for ; Mon, 04 Aug 2025 06:32:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cmpxchg-org.20230601.gappssmtp.com; s=20230601; t=1754314365; x=1754919165; 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=ARdbuY4ihnBfNqmPKZqv+tAobgDvylQcvqI7MjhLvS8=; b=mLbAN61tBdBx+yD+bhy2PU/4TJazTG2zGQ3Z9yzp6T0njtqnM1416UZ7qLVFwm7Du5 tRAq+O6Hydo/zIt40EUYvR4qwG6yujuxkMRAw4eIBg4vODjibzTK7rZdfPJULF7PBEZx NHLCxqo1fBpH77iPiNB8SfrwsABR/bafV1Zly03Tntfr5jWK/lJ1dOzPHcv7ENQ8BS6c 7FzOHOQ6oG3aU6fg9rEdL/GWxLOTBWlyYYKv9Dy+1JBpttJUWK1dczUiHcJVay3lI+Mc YGvaxteuBi/0eDfqs7Y8hMl4NhnfGVyiFnrWBaIh/cTqLrDHh4kuGMmwCSGQp97Jh1KZ OlUA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1754314365; x=1754919165; 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=ARdbuY4ihnBfNqmPKZqv+tAobgDvylQcvqI7MjhLvS8=; b=SbJvxVWBHPzqdUKP/bzHPO4DieeUJdEInEndAuZj/ZNCC6y0PhlIadDbVWn9AVmeEu 3/FpBo3IqjXLBf2RB/UeXz3S2+JcOdoYvB+3eyknWK2UyknT0G8vdF/wGWufBTUavVPU Vi4oDVSGZilK0A1ZLkotqMnBe89MenNOBu8A/Q2546zYjqx1LVQBVeHdWMlYrHOj7nXi bmoaS5eId9GQIGfbx8bLq5UyyA4roQnMOjAJwGlCR4THEc1ytEkzSH+qbVwqU6ZlhRPr J1MbjMRbo7fF9Om1puZAnx4DOPa734fyYEtY4nhauCHp7BXr7Po2UykumxnYtMAxjwBy NgHQ== X-Gm-Message-State: AOJu0YxQ1ZAftbXKIM1EL1bw8xVb2+NdKkpS5firsdUMJpBPy97yEs0q cXINHcujNJk1w509ngd8RTSZHCP5dwSAi5S+oZfllcuFKPbCsZTo1TkVZ8868qEzei8= X-Gm-Gg: ASbGncumnsHkrpF9d649JCgKziD6BYFlKFE5CKX489C3Ppirrj8vDQyMaGTrpdMZVaB IfbW/Qq8fdvzYdipWFImLIwZ7DGtXrIZ4Cf0boHoBDsDP5yGnoUwbejHMNDf8BZsLvvsGGB9GHf /0eiwdi6/WAnCqSZ9IWPZrBA2AsQRcKXi8dwCW4b7D57zgxNZ2jc+F9VDMjxX1SR2NmP/Zs8LIz JkZzrmxrxkvxOwurj3u3kQXPX+QV6+98v2mpbAbQdtA0/fzZTJy2UX/8tNPZGUVMLyzhoFZHPJR Z1DdlyF3gkfIBfTFUcM9xYWBILpuqzfhxqYVLPB0UToiAUlGQRnBZA2u6LfrZQo42I3DNl0HEng blZvG3oeTEuvwzSgcYozSHg== X-Google-Smtp-Source: AGHT+IF7J9OrujvHAgN5i0H7oCNZ6uBRyDC1EFC/YvErPRsiTQSvUU17oBWdAHJzGy7XoL/W1tODjA== X-Received: by 2002:a05:6214:4015:b0:707:77cb:5b0b with SMTP id 6a1803df08f44-70936243ecemr127645756d6.26.1754314364892; Mon, 04 Aug 2025 06:32:44 -0700 (PDT) Received: from localhost ([2603:7000:c01:2716:365a:60ff:fe62:ff29]) by smtp.gmail.com with UTF8SMTPSA id 6a1803df08f44-7077cde6062sm58097776d6.71.2025.08.04.06.32.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Aug 2025 06:32:44 -0700 (PDT) Date: Mon, 4 Aug 2025 09:32:40 -0400 From: Johannes Weiner To: Chris Bainbridge Cc: linux-kernel@vger.kernel.org, surenb@google.com, bsegall@google.com, dietmar.eggemann@arm.com, mingo@redhat.com, juri.lelli@redhat.com, mgorman@suse.de, peterz@infradead.org, rostedt@goodmis.org, vschneid@redhat.com, vincent.guittot@linaro.org, regressions@lists.linux.dev Subject: Re: [REGRESSION] intermittent psi_avgs_work soft lockup Message-ID: <20250804133240.GA1303466@cmpxchg.org> References: 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: Hi Chris, On Sun, Aug 03, 2025 at 11:14:42PM +0100, Chris Bainbridge wrote: > Hello, > > I'm getting intermittent soft lockups with recent kernel builds. This is > a new error that I haven't seen before. This smells of the seqlock re-init problem in 570c8efd5eb7. Could you try to see if the below patch fixes it for you? https://lore.kernel.org/lkml/20250716104050.GR1613200@noisy.programming.kicks-ass.net/ We probably want Cc: stable on this patch now that 6.16 is released. Thanks