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Tue, 20 Jan 2026 17:56:53 -0800 (PST) Received: from google.com ([2a00:79e0:2031:6:a85f:a6d:c028:515a]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-81fa12b3165sm13179592b3a.60.2026.01.20.17.56.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Jan 2026 17:56:52 -0800 (PST) Date: Wed, 21 Jan 2026 10:56:46 +0900 From: Sergey Senozhatsky To: Yosry Ahmed Cc: Sergey Senozhatsky , Andrew Morton , Minchan Kim , Nhat Pham , Johannes Weiner , Brian Geffon , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [RFC PATCH] zsmalloc: make common caches global Message-ID: <2tpqaxgslryp3l4wauf5umuseccpkp3z5l6nuulxfiqzrdflsa@jsddpcvarb3r> References: <20260116044841.334821-1-senozhatsky@chromium.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Queue-Id: 94B8D80006 X-Stat-Signature: xti8oj1rt518jacs6qqp1u6u4adxsr7x X-Rspam-User: X-Rspamd-Server: rspam05 X-HE-Tag: 1768960614-584874 X-HE-Meta: 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 FQpX1ZXe iHMy1RgETIMQylqxGgrt1g7rVKKakBgmT9Z6KjkJqR0atFxjWDrE3l8iu8LeHxqeMn7ftvTYxs2h3gO0jGzsfAducAd8dP0wR64nnaMzi70fxvR6KFn5HJGjwJ3hsB6EVEY2QTmNG5uQe3Jq9DBVNef/R4HApkKp8uxFsDknPpHkWfpy3UcZ2xOavQx9B7MfUYkCSoENIzl4AzswF7tNYoM3xLimMpspuabb/VCm4tP9ZJl7gRnOOq1b6ng8t5wQ19jBaZnTbs8GtAMKnYmnEw+FuIfajEmeVE5YOlWdGPdFYA2Cbxp8krRiTkDUXq0efZnq8B5hcg84+7U/YMbRSP7kym0F0prcIuHbl6j6KH1C4Dus= 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: On (26/01/21 01:30), Yosry Ahmed wrote: > > That was about ~20 times reduction in waste when using 32 pools with > zswap. Nice, thanks! > I suspect we wouldn't be using that many pools with zram. Hard to tell. We have users that setup many zram devices, even multiple swap zram devices. In terms of numbers - I think swap zram users still setup less devices than users that use zram as a normal block device (that number in theory can be quite high, depending on use case).