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Sun, 30 Nov 2025 23:39:25 -0800 (PST) Received: from google.com ([2a00:79e0:2031:6:943c:f651:f00f:2459]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7d15e9c3f79sm12345012b3a.42.2025.11.30.23.39.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 30 Nov 2025 23:39:24 -0800 (PST) Date: Mon, 1 Dec 2025 16:39:20 +0900 From: Sergey Senozhatsky To: Sergey Senozhatsky Cc: Andrew Morton , Richard Chang , Brian Geffon , Minchan Kim , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-block@vger.kernel.org Subject: Re: [PATCH 0/2] zram: introduce compressed data writeback Message-ID: <24o47a762kurbp33vgmsp5gclyijt47xl6ms3ynxjr3k5o3mbl@t2lsiq6swjj6> References: <20251128170442.2988502-1-senozhatsky@chromium.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251128170442.2988502-1-senozhatsky@chromium.org> X-Rspamd-Queue-Id: 9C27620005 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: dkbn59kiqqjqg18mutzz7d96n1t1y45n X-HE-Tag: 1764574766-851760 X-HE-Meta: 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 FLScsy0a 8Nd2ODI02eX0dcbhphi/c5QVSN5mdGIFxZGf/Xcr6fkjxj13FkalZZDV+XfxI9G8rDQq1xfgX+YEJOp6qPpveHMwyAJg3aCAyF9YdMpwocGB2BmGCDbABOJhISejUmCTn5ggx2iMQp11JoDDNSD9HtygkkJIXEigq5mGHXvxqHdcHa5ZhWnjIrOq9eyaOFkkni8WEmvnYom0W3ecCCWs90HqA5ctqLKR1QS91zu+oYG7/vDIWdYMsnenIS8Dm8yJd+N6cffWVt7Cl34GgB2zDkPRIRZr3bZahl9aqVLR0hAoEJMjLgVDu2+DuvMcVOn+b8iLrgDevcKsRIjEkImpwLcHp7tcbc7iBpe4nWCDVWcTrvSQ= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000001, 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 (25/11/29 02:04), Sergey Senozhatsky wrote: > 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. JFI, v2 is coming.