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[109.81.92.28]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43d1e4e52a0sm62165656f8f.30.2026.04.09.01.22.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 09 Apr 2026 01:22:18 -0700 (PDT) Date: Thu, 9 Apr 2026 10:22:17 +0200 From: Michal Hocko To: Kefeng Wang Cc: Andrew Morton , David Hildenbrand , Christian Brauner , Alexander Viro , "Matthew Wilcox (Oracle)" , Jan Kara , "Liam R. Howlett" , Lorenzo Stoakes , Mike Rapoport , Suren Baghdasaryan , Vlastimil Babka , linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH RFC] fs: drop_caches: introduce per-node drop_caches interface Message-ID: References: <20260409063503.3475420-1-wangkefeng.wang@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: A4AE9180005 X-Stat-Signature: uwpjdh8bxbyppw9a7zokdw8roong36ex X-HE-Tag: 1775722940-636142 X-HE-Meta: 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 EN3oLXFM ZTbUmquLynJisdgZZ9+Liyu0UEfLfsPfFmfguOzd+SqLNl37vwpH5Xp3WUu8lj8l6BCxZ/sFgpmIhP5Btiq4RokgPTE575Fx5HklViBYedeUhGaW1BYhPwHB5JhwX23NqFu0Bul4li/P60pqaHhnXV9WwsAwFhVnZsIcyOo21Q7Dsb1mhsoJA1U8K5TdRk/tSUb1r Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu 09-04-26 16:08:37, Kefeng Wang wrote: [...] > To use the reclaim interface, there are two differences, > > 1) we need to input the reclaim numbers and swappiness, this is not a big > problem > 2) for reclaim, it supports swappiness=max to only reclaim anonymous pages, > but cannot only reclaim file pages, Why is 2) a real constrain? -- Michal Hocko SUSE Labs