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[34.85.235.172]) by smtp.gmail.com with ESMTPSA id 00721157ae682-81ef4034901sm59680597b3.12.2026.07.21.01.00.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Jul 2026 01:00:59 -0700 (PDT) Date: Tue, 21 Jul 2026 04:00:59 -0400 From: Willem de Bruijn To: Srikar Dronamraju , LKML , netdev@vger.kernel.org, David S Miller Cc: Ingo Molnar , Peter Zijlstra , Dietmar Eggemann , Dust Li , D Wythe , Eric Dumazet , Jakub Kicinski , Jon Maloy , Kuniyuki Iwashima , linux-sctp@vger.kernel.org, Mahanta Jambigi , Marcelo Ricardo Leitner , Paolo Abeni , Sidraya Jayagond , Simon Horman , Tony Lu , Wen Gu , Wenjia Zhang , Willem de Bruijn , Xin Long , Shrikanth Hegde , Vincent Guittot , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , K Prateek Nayak , Srikar Dronamraju Message-ID: In-Reply-To: <20260714013940.4068189-5-srikar@linux.ibm.com> References: <20260714013940.4068189-4-srikar@linux.ibm.com> <20260714013940.4068189-5-srikar@linux.ibm.com> Subject: Re: [PATCH 1/2] net/socket: Record preference for synchronous wakeups 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=utf-8 Content-Transfer-Encoding: 7bit Srikar Dronamraju wrote: > Scheduler differentiates between affine and non-affine wakeups by the > way of sync flags. Scheduler prefers to pull the tasks towards the waker > if the sync flag is set. > > In some cases, socket APIs are blindly requesting sync wakeups. This may > cause load-balance issues and non-optimal performance. > > Record whether the most recent blocking socket operation could benefit What is the heuristic that determines this? If respinning, please state that explicitly in the commit message. > from synchronous wakeups. Subsequent readiness notifications use this > hint to determine whether WF_SYNC should be propagated. > > The flag is advisory and affects only wakeup placement decisions. > > Signed-off-by: Srikar Dronamraju