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Sun, 22 Sep 2024 08:45:38 -0700 (PDT) Received: from debian.local ([2a0a:ef40:c56:fd01:3715:1975:8d7:6033]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a90612b3833sm1098163166b.128.2024.09.22.08.45.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 22 Sep 2024 08:45:38 -0700 (PDT) Date: Sun, 22 Sep 2024 16:45:35 +0100 From: Chris Bainbridge To: Peter Zijlstra Cc: linux-kernel@vger.kernel.org, bsegall@google.com, dietmar.eggemann@arm.com, efault@gmx.de, juri.lelli@redhat.com, kprateek.nayak@amd.com, mgorman@suse.de, mingo@redhat.com, rostedt@goodmis.org, tglx@linutronix.de, vincent.guittot@linaro.org, vschneid@redhat.com, wuyun.abel@bytedance.com, youssefesmat@chromium.org, spasswolf@web.de, regressions@lists.linux.dev Subject: [REGRESSION] Re: [PATCH 17/24] sched/fair: Implement delayed dequeue Message-ID: References: <20240830123458.3557-1-spasswolf@web.de> 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: <20240830123458.3557-1-spasswolf@web.de> On Fri, Aug 30, 2024 at 02:34:56PM +0200, Bert Karwatzki wrote: > Since linux next-20240820 the following messages appears when booting: > > [ T1] smp: Bringing up secondary CPUs ... > [ T1] smpboot: x86: Booting SMP configuration: > [ T1] .... node #0, CPUs: #2 #4 #6 #8 #10 #12 #14 #1 > This is the line I'm concerend about: > [ T1] psi: inconsistent task state! task=61:cpuhp/3 cpu=0 psi_flags=4 clear=0 set=4 > [ T1] #3 #5 #7 #9 #11 #13 #15 > [ T1] Spectre V2 : Update user space SMT mitigation: STIBP always-on > [ T1] smp: Brought up 1 node, 16 CPUs > [ T1] smpboot: Total of 16 processors activated (102216.16 BogoMIPS) > > I bisected this to commit 152e11f6df29 ("sched/fair: Implement delayed dequeue"). > Is this normal or is this something I should worry about? > > Bert Karwatzki I am also getting a similar error on boot, and bisected it to the same commit: [ 0.342931] psi: inconsistent task state! task=15:rcu_tasks_trace cpu=0 psi_flags=4 clear=0 set=4 #regzbot introduced: 152e11f6df293e816a6a37c69757033cdc72667d