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Mon, 04 Aug 2025 15:34:35 -0700 (PDT) Received: from debian.local ([90.252.123.198]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3b79c3abed3sm16807486f8f.10.2025.08.04.15.34.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Aug 2025 15:34:34 -0700 (PDT) Date: Mon, 4 Aug 2025 23:34:32 +0100 From: Chris Bainbridge To: Johannes Weiner 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: References: <20250804133240.GA1303466@cmpxchg.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: <20250804133240.GA1303466@cmpxchg.org> On Mon, Aug 04, 2025 at 09:32:40AM -0400, Johannes Weiner wrote: > 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 That's the one. Thank you. #regzbot introduced: 570c8efd5eb7 #regzbot monitor: https://lore.kernel.org/lkml/0d86c527-27a7-44d5-9ddc-f9a153f67b4d@meta.com/ #regzbot fix: 99b773d720ae