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Wed, 21 Aug 2024 05:46:28 -0700 (PDT) Received: from localhost ([193.86.92.181]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a83838d0271sm892634966b.82.2024.08.21.05.46.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Aug 2024 05:46:28 -0700 (PDT) Date: Wed, 21 Aug 2024 14:46:27 +0200 From: Michal Hocko To: gaoxu Cc: Andrew Morton , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Suren Baghdasaryan , Shaohua Li , yipengxiang , fengbaopeng , Kalesh Singh Subject: Re: [PATCH v2] mm: add lazyfree folio to lru tail Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Queue-Id: 30FE0A0016 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: h1hcioj5i9xk67r1311ipjiryfuqirmg X-HE-Tag: 1724244389-705532 X-HE-Meta: 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 kAa51LAa mMwrexBGrhL2bt8wMBKK2mwFEvrQBH31RohtRsXpb0Bg/7vwxu4mjbxU/fHL2d6xVj6XVGuu0Au6a6XRrFlBKWUaAbFdeqKMsn6cho08Ely8EIw12g6OTs+X/V8Is20oIjQX94IMY14jd6knn4pNralPGlyn2NZOYBNLokuS65hF37tXq1vKvW5qZItG5Se0wnD8MKysVAfOIeeiwifRp0MGMxvcgl01d5GWFhUbGlI+e0Zy9cdLWwd3QCjXKqW9CkFmkq2C3INeO4z5SKeowkMCCzDfH6g1twTYaVKoa/nSIE8Kzg6PJqpGOxXVBjgVuhnN3NTJJ+n5C/i0= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000930, 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 Fri 16-08-24 07:48:01, gaoxu wrote: > Replace lruvec_add_folio with lruvec_add_folio_tail in the lru_lazyfree_fn: > 1. The lazy-free folio is added to the LRU_INACTIVE_FILE list. If it's > moved to the LRU tail, it allows for faster release lazy-free folio and > reduces the impact on file refault. This has been discussed when MADV_FREE was introduced. The question was whether this memory has a lower priority than other inactive memory that has been marked that way longer ago. Also consider several MADV_FREE users should they be LIFO from the reclaim POV? -- Michal Hocko SUSE Labs