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Sat, 20 Dec 2025 03:14:28 -0800 (PST) Received: from google.com ([2a00:79e0:2031:6:525f:ba4f:fd0b:71f6]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a2f3c82858sm47280545ad.29.2025.12.20.03.14.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 20 Dec 2025 03:14:27 -0800 (PST) Date: Sat, 20 Dec 2025 20:14:22 +0900 From: Sergey Senozhatsky To: Yuwen Chen Cc: senozhatsky@chromium.org, akpm@linux-foundation.org, bgeffon@google.com, licayy@outlook.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, minchan@kernel.org, richardycc@google.com Subject: Re: [RFC PATCHv5 0/6] zram: introduce writeback bio batching Message-ID: References: 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: AC3F220002 X-Stat-Signature: mo4o8tudh97chp8qpai4izm3hf7f6dw7 X-HE-Tag: 1766229269-833789 X-HE-Meta: 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 5/tsyHri 1ouzsfG2I7UuIw8PZlxNkm22Jyg== 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: Fixed Subject line. On (25/11/24 10:15), Yuwen Chen wrote: > Subject: Re: [RFC PATCHv5 0/6] zram: introduce writeback bio batching > > On Fri, 21 Nov 2025 18:12:29 +0900, Sergey Senozhatsky wrote: > > I had a version of the patch that had different main loop. It would > > always first complete finished requests. I think this one will give > > accurate ->inflight number. > > Using the following patch, the final measured result is 32. Using 32 > here might be a relatively reasonable value. > > /* XXX: should be a per-device sysfs attr */ > -#define ZRAM_WB_REQ_CNT 32 > +#define ZRAM_WB_REQ_CNT 64 Sorry, do you suggest to change default value to 64 or are you happy with 32?