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Wed, 22 Jan 2025 05:56:43 -0500 (EST) X-Mailer: MessagingEngine.com Webmail Interface Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Date: Wed, 22 Jan 2025 11:56:13 +0100 From: "Arnd Bergmann" To: "Naresh Kamboju" , "Greg Kroah-Hartman" Cc: stable@vger.kernel.org, patches@lists.linux.dev, linux-kernel@vger.kernel.org, "Linus Torvalds" , "Andrew Morton" , "Guenter Roeck" , shuah , patches@kernelci.org, lkft-triage@lists.linaro.org, "Pavel Machek" , "Jon Hunter" , "Florian Fainelli" , "Sudip Mukherjee" , srw@sladewatkins.net, rwarsow@gmx.de, "Conor Dooley" , hargar@microsoft.com, "Mark Brown" , "Peter Zijlstra" , "Anders Roxell" , "Vincent Guittot" , "Dan Carpenter" Message-Id: In-Reply-To: References: <20250121174532.991109301@linuxfoundation.org> Subject: Re: [PATCH 6.12 000/122] 6.12.11-rc1 review Content-Type: text/plain Content-Transfer-Encoding: 7bit On Wed, Jan 22, 2025, at 11:04, Naresh Kamboju wrote: > On Tue, 21 Jan 2025 at 23:28, Greg Kroah-Hartman > wrote: > 0000000000000000 > <4>[ 160.712071] Call trace: > <4>[ 160.712597] place_entity (kernel/sched/fair.c:5250 (discriminator 1)) > <4>[ 160.713221] reweight_entity (kernel/sched/fair.c:3813) > <4>[ 160.713802] update_cfs_group (kernel/sched/fair.c:3975 (discriminator 1)) > <4>[ 160.714277] dequeue_entities (kernel/sched/fair.c:7091) > <4>[ 160.714903] dequeue_task_fair (kernel/sched/fair.c:7144 (discriminator 1)) > <4>[ 160.716502] move_queued_task.isra.0 (kernel/sched/core.c:2437 > (discriminator 1)) I don't see anything that immediately sticks out as causing this, but I do see five scheduler patches backported in stable-rc on top of v6.12.8, these are the original commits: 66951e4860d3 ("sched/fair: Fix update_cfs_group() vs DELAY_DEQUEUE") 30dd3b13f9de ("sched_ext: keep running prev when prev->scx.slice != 0") a2a3374c47c4 ("sched_ext: idle: Refresh idle masks during idle-to-idle transitions") 68e449d849fd ("sched_ext: switch class when preempted by higher priority scheduler") 6268d5bc1035 ("sched_ext: Replace rq_lock() to raw_spin_rq_lock() in scx_ops_bypass()") Arnd