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imf20.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=lst.de; spf=pass (imf20.hostedemail.com: domain of hch@lst.de designates 213.95.11.211 as permitted sender) smtp.mailfrom=hch@lst.de ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1784784342; b=Cq6oZ8mtsph38QT1RGHzEF5RdjT5PFjxADee81A5By+BVUGr5Zd2EsSKyXQKgYxOTwvEqV 4+PLatJfylRYzFFIZ2WYJLyjtjvnk0V9rFZBvIpyeVZhmCCAxhUZPGeZ3TZHQJc+Nzn9CU pxiWRn1VKxmf28TDr52iv0PJWRLmDRs= Received: by verein.lst.de (Postfix, from userid 2407) id 14D7C68AFE; Thu, 23 Jul 2026 07:25:37 +0200 (CEST) Date: Thu, 23 Jul 2026 07:25:36 +0200 From: Christoph Hellwig To: Usama Arif Cc: Christoph Hellwig , baoquan.he@linux.dev, akpm@linux-foundation.org, chrisl@kernel.org, kasong@tencent.com, nphamcs@gmail.com, shikemeng@huaweicloud.com, youngjun.park@lge.com, ryncsn@gmail.com, trondmy@kernel.org, anna@kernel.org, sfrench@samba.org, linux-mm@kvack.org, linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org Subject: Re: [PATCH 1/3] mm/swap: revert to single-folio writes for synchronous swap devices Message-ID: <20260723052536.GA7565@lst.de> References: <20260722130615.3163560-2-hch@lst.de> <20260722163601.1421253-1-usama.arif@linux.dev> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260722163601.1421253-1-usama.arif@linux.dev> User-Agent: Mutt/1.5.17 (2007-11-01) X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: DCBE11C000A X-Rspam-User: X-Stat-Signature: dwqoguf795zycxu66o17wrwoykdm3j1d X-HE-Tag: 1784784341-44313 X-HE-Meta: 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 pET+WhiA jaggpZo9SMh4Cy7FQ8Cn1Lto6JP1N51qEZdvNnlQ1dRjqCwHmDs6YWOoLBEHVt/D4cseYMNe59PWYfe+xlSnenanQk/pj8/O55V0L Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Jul 22, 2026 at 09:36:00AM -0700, Usama Arif wrote: > On Wed, 22 Jul 2026 15:06:07 +0200 Christoph Hellwig wrote: > > > Kairui Song reported that zram benefits from submitting each folio > > directly instead of batching up I/O because the classic LRU scanning > > benefits from clearing the folio writeback bit in the scan loop. > > > > Accommodate that by kicking off reads for synchronous devices for > > s/reads/writes/ ? Yes, fixed.