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[86.128.182.179]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4aa7ee57594sm63155025e9.3.2026.10.29.05.51.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 29 Oct 2026 05:51:32 -0700 (PDT) Message-ID: <51eadc2c-e4e5-4f64-b1f2-87f2620969b8@layalina.io> Date: Thu, 29 Oct 2026 12:51:30 +0000 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 1/2] sched/uclamp: Fix race condition leading to imbalanced uclamp_rq To: John Stultz Cc: Ingo Molnar , Peter Zijlstra , Vincent Guittot , Christian Loehle , Dietmar Eggemann , Steven Rostedt , linux-kernel@vger.kernel.org, Wei Wang References: <20261028020512.10245-1-qyousef@layalina.io> <20261028020512.10245-2-qyousef@layalina.io> Content-Language: en-US From: Qais Yousef In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 10/28/26 17:18, John Stultz wrote: > On Tue, Oct 27, 2026 at 7:05 PM Qais Yousef wrote: >> >> Static keys are not guaranteed to be enabled atomically across CPUs. > > Nit: Not only across CPUs, but also across jump_label callsites! I > believe the enqueue/dequeue race Wei reported happened on the same > cpu. > > thanks > -john Right, this is news to me. I'll update the text. Thanks!