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[109.81.83.7]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-47fb6b0ef1asm5812361f8f.19.2026.07.29.01.21.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Jul 2026 01:21:46 -0700 (PDT) Date: Wed, 29 Jul 2026 10:21:45 +0200 From: Michal Hocko To: Shakeel Butt Cc: Andrew Morton , David Rientjes , Johannes Weiner , Roman Gushchin , Muchun Song , Thomas Gleixner , Ingo Molnar , Suren Baghdasaryan , Usama Arif , Peter Zijlstra , Darren Hart , Davidlohr Bueso , =?iso-8859-1?Q?Andr=E9?= Almeida , "Liam R . Howlett" , Yosry Ahmed , Rik van Riel , Nhat Pham , Meta kernel team , linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC] Robust futex causing memcg OOM storm on exit Message-ID: References: <20260723001908.4046643-1-shakeel.butt@linux.dev> 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: On Tue 28-07-26 19:25:57, Shakeel Butt wrote: [...] > Now I have much better results. Previous numbers were on a VM and now I have > ran on a physical machine and the results are much better and consistent. The > baseline consistently shows ~90 seconds exit time while (tsk_is_oom_victim + > MMF_OOM_SKIP) consistently show ~3 seconds exit time. I will send the formal > patch soon. Thanks a lot for the testing Shakeel! We can always ease the check but if the more conservative approach helps already then this would be my preferred way. Thanks! -- Michal Hocko SUSE Labs