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[109.81.80.79]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-47f85c67339sm3865344f8f.31.2026.07.22.01.07.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Jul 2026 01:07:54 -0700 (PDT) Date: Wed, 22 Jul 2026 10:07:53 +0200 From: Michal Hocko To: deepakraog Cc: Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/4] mm: vmpressure: scale sampling window with machine size Message-ID: References: <20260715143646.15828-1-gaikwad.dcg@gmail.com> 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: <20260715143646.15828-1-gaikwad.dcg@gmail.com> On Wed 15-07-26 20:06:41, deepakraog wrote: > The vmpressure window size was fixed at 512 pages (SWAP_CLUSTER_MAX * 16). > Scale it at boot from total memory and CPU count using the same fls-based > formula as vmstat per-zone thresholds, clamped between 128 and 2048 pages. This is not giving us any rationale why this is needed or desirable. -- Michal Hocko SUSE Labs