From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 30C9232571A; Fri, 6 Feb 2026 07:42:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770363745; cv=none; b=bJNLxue7/LWgLjOkQiIzkMQYWr67ArpQKd5uVmikunP1TR15JXYfsPDAL+Xshg+zRvynZH5eA6gB2FzzYRYrXOD/2627hVvdjG9YQV7w1eeKxygrPmL7MGUDWdDzppBN4lhlM4sQ/OTR74YgHoKpLpYlIWTaWpOjMRtlDlOsDhI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770363745; c=relaxed/simple; bh=WeVmhn33iwZYsaBPkxpYtNiRgSAWxahrvzcjNmwtGhU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=MvSfqW/9g7H6Hp6SUbVzQ1LemMLiU2RZSnAlMw27m9WRgDLtgA+1NzFPIU9lgog9i7GZfytRijkgU546zVZutgX1W0keIFXZIKxmmSlj+nV5voPREXtWDWDYp8gA4KJJV7AC3yQRg8Kf3zqM30Jq/hCmPWmecFis1S2v/O9iRmw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=1l4a5UiE; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="1l4a5UiE" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=9Zu5Sn8tUPbS51W0jfTqrezTHnrJClgJeJJdhVN8z+Q=; b=1l4a5UiE4ghuKYHlKJdllioTt7 ACusxxnnbzdcxSjFuLZD7lfcYlOSSKxdH8Ibk+tN9sXuTG9/aKNA5c54WCnlyErJFzRAB+9Zcrjg1 COit7Ud0+mefdU+6Zht2Gp0p1JHLgw7sdgSWbIFU42RuKrjbR1M3ipyIXrhTIH8rFjRp9hTERSCyJ +m2Lc4a5yje6NwZ5RxxvtSh3Sn0b7B98YyCXBFjIhXRFwigTNYlyglxR7zRS/uTBkRgUo+OXPYQ4N KogCialo1FJGIitsThI/4xRmot+jwaJX1Y+/1Hr2IMmy3l9U+fYzENmubwkPksfoLzkbhLe9CFgRW iAAtSdaw==; Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1voGTt-0000000B08t-2jaW; Fri, 06 Feb 2026 07:42:21 +0000 Date: Thu, 5 Feb 2026 23:42:21 -0800 From: Christoph Hellwig To: Joanne Koong Cc: axboe@kernel.dk, miklos@szeredi.hu, bschubert@ddn.com, csander@purestorage.com, krisman@suse.de, io-uring@vger.kernel.org, asml.silence@gmail.com, xiaobing.li@samsung.com, safinaskar@gmail.com, linux-fsdevel@vger.kernel.org Subject: Re: [PATCH v4 00/25] fuse/io-uring: add kernel-managed buffer rings and zero-copy Message-ID: References: <20260116233044.1532965-1-joannelkoong@gmail.com> Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260116233044.1532965-1-joannelkoong@gmail.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Fri, Jan 16, 2026 at 03:30:19PM -0800, Joanne Koong wrote: > This series adds buffer ring and zero-copy capabilities to fuse over io-uring. > This requires adding a new kernel-managed buf (kmbuf) ring type to io-uring > where the buffers are provided and managed by the kernel instead of by > userspace. > > On the io-uring side, the kmbuf interface is basically identical to pbufs. > They differ mostly in how the memory region is set up and whether it is > userspace or kernel that recycles back the buffer. Internally, the > IOBL_KERNEL_MANAGED flag is used to mark the buffer ring as kernel-managed. Can you split that series out as it also has other applications and smaller series might be easier to review?