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[109.81.31.43]) by smtp.gmail.com with UTF8SMTPSA id 5b1f17b1804b1-45b81a9e971sm295031615e9.18.2025.09.04.05.21.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Sep 2025 05:21:13 -0700 (PDT) Date: Thu, 4 Sep 2025 14:21:08 +0200 From: Michal Hocko To: "Liam R. Howlett" Cc: zhongjinji , rientjes@google.com, shakeel.butt@linux.dev, akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, lorenzo.stoakes@oracle.com, surenb@google.com, liulu.liu@honor.com, feng.han@honor.com Subject: Re: [PATCH v7 2/2] mm/oom_kill: The OOM reaper traverses the VMA maple tree in reverse order Message-ID: References: <20250903092729.10611-1-zhongjinji@honor.com> <20250903092729.10611-3-zhongjinji@honor.com> <7rvwvuifkav5oz4ftfuziq23wek2bn6ygvrfotpaweypuy7obv@hjuf3eknscii> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7rvwvuifkav5oz4ftfuziq23wek2bn6ygvrfotpaweypuy7obv@hjuf3eknscii> X-Rspamd-Queue-Id: B1CEAC0005 X-Rspamd-Server: rspam04 X-Rspam-User: X-Stat-Signature: fm9x3u5xndmmmtio3kqru647ki633uy5 X-HE-Tag: 1756988475-86843 X-HE-Meta: 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 nDnNsCaB 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed 03-09-25 15:02:34, Liam R. Howlett wrote: > * Michal Hocko [250903 08:58]: > > On Wed 03-09-25 17:27:29, zhongjinji wrote: [...] > mmu_notifier_release(mm) is called early in the exit_mmap() path should > cause the mmu notifiers to be non-blocking (according to the comment in > v6.0 source of exit_mmap [1]. I am not sure I follow you here. How does this relate to the actual direction of the address space freeing? > > > Signed-off-by: zhongjinji > > > > Anyway, the change on its own makes sense to me > > Acked-by: Michal Hocko > > > > Thanks for working on the changelog improvements. > > [1]. https://elixir.bootlin.com/linux/v6.0.19/source/mm/mmap.c#L3089 > > ... > > Thanks, > Liam -- Michal Hocko SUSE Labs