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Fri, 28 Nov 2025 09:05:12 -0800 (PST) Received: from tigerii.tok.corp.google.com ([2a00:79e0:2031:6:5b9f:6c7b:4d09:6126]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7d150c5e611sm5568242b3a.6.2025.11.28.09.05.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Nov 2025 09:05:12 -0800 (PST) From: Sergey Senozhatsky To: Andrew Morton , Richard Chang Cc: Brian Geffon , Minchan Kim , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-block@vger.kernel.org, Sergey Senozhatsky Subject: [PATCH 0/2] zram: introduce compressed data writeback Date: Sat, 29 Nov 2025 02:04:40 +0900 Message-ID: <20251128170442.2988502-1-senozhatsky@chromium.org> X-Mailer: git-send-email 2.52.0.487.g5c8c507ade-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: xg59nxfbi1wxwetm4exzzsr4bdwzwiqo X-Rspam-User: X-Rspamd-Queue-Id: 6A6CA140013 X-Rspamd-Server: rspam09 X-HE-Tag: 1764349514-312495 X-HE-Meta: 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 PiB917R1 8Dd/AuvUUExDp1vqYMNzCCePyjdYDOIssjhBV6oTWB39Gn+useBXhQeJtyLhkw6gwQP6QhE05u1xcy4ob/0xkMu+cDZq/3fLfMRKxbXo2ba/2b7wOSKRBcQuzNJZ+3ymekxbK0rSLfLqekmG35b9tK8NADWwVuRSawTJiEhcBqemeOBVNx55O8lgg8fa/8jzufImX/H8+prD7iC84SQjJKPR/1uw1GdFiKI8VuRcoXQHSkRc/eArwU5+ZcnR7JJsjzW9O5yKhSE8dZOyNTq12Awuta1y692BJxD0eQupqpjO04RDlkMdp6JVGCNFi1lF1a48c 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: As writeback becomes more common there is another shortcoming that needs to be addressed - compressed data writeback. Currently zram does uncompressed data writeback which is not optimal due to potential CPU and battery wastage. This series changes suboptimal uncompressed writeback to a more optimal compressed data writeback. Richard Chang (1): zram: introduce compressed data writeback Sergey Senozhatsky (1): zram: rename zram_free_page() drivers/block/zram/zram_drv.c | 260 ++++++++++++++++++++++++++-------- 1 file changed, 202 insertions(+), 58 deletions(-) -- 2.52.0.487.g5c8c507ade-goog