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[109.81.86.177]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48a7c2f2eb8sm20657925e9.6.2026.04.29.01.18.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Apr 2026 01:18:43 -0700 (PDT) Date: Wed, 29 Apr 2026 10:18:42 +0200 From: Michal Hocko To: Minchan Kim Cc: Suren Baghdasaryan , "David Hildenbrand (Arm)" , akpm@linux-foundation.org, hca@linux.ibm.com, linux-s390@vger.kernel.org, brauner@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, timmurray@google.com Subject: Re: [PATCH v1 2/3] mm: process_mrelease: skip LRU movement for exclusive file folios Message-ID: References: <20260421230239.172582-3-minchan@kernel.org> <7c7da8ae-cd39-4edf-b94f-c79ab85df456@kernel.org> 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 28-04-26 18:19:31, Minchan Kim wrote: > On Tue, Apr 28, 2026 at 08:56:36AM +0200, Michal Hocko wrote: [...] > > DESCRIPTION > > The process_mrelease() system call is used to free the memory of > > an exiting process. > > "Free the memory of an exiting process" implies all memory, not just > anonymous. User cannot know it will free only anonymous, and I am trying to > make it work as intended by completing a symmetric reclamation path. Page cache doesn't belong to any process. [...] > >From cf292f8f8ead8df9161aad342c36633ffa90257f Mon Sep 17 00:00:00 2001 > From: Minchan Kim > Date: Tue, 28 Apr 2026 16:39:06 -0700 > Subject: [PATCH] mm: process_mrelease: skip LRU movement and expedite clean > file folio reclaim I will let others to discuss this. I maintain my position that this is a hack for a very particular use case and you still seem to not explain non-Android users of the syscall. Anyway, I will not repeat myself here. -- Michal Hocko SUSE Labs