From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from zeniv.linux.org.uk (zeniv.linux.org.uk [62.89.141.173]) (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 B8D683DD53E; Mon, 1 Jun 2026 17:33:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=62.89.141.173 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780335213; cv=none; b=gh39mq3gW7O4Fqd32aQ0YedWoZTtOTUdw3Xg4/LlRsacaLof2pSLLL8gR4hB9kZyT+4nvwsBj9utWPSBSJ3R43AK/6qzfydoAhAX4QJc+YMAQNcZF3VsXSkcCY1ndjr8KSVDxPCtOumKz/Qf8gBC/qq7o0SjXGx9mV7hXachfy8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780335213; c=relaxed/simple; bh=UIq0QwS9m8Vn34cqT2JX2YbbXgMu17lIdfl6g487i/A=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=XdkILFnRMUyVLYYjy1JgCGNfL+IQi+nzk0IcBHlDXFnETw5m3BYktdDARhD5cqEPFEHC2bNFI76pywy2aikqy3nxhb/j1f4jggDrCHIl4vj15363AWla2IWduT1NSerdQpMLpAHLiSTXnXQnHSIrbERj63x71S5oqZYT/RinF8A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zeniv.linux.org.uk; spf=none smtp.mailfrom=ftp.linux.org.uk; dkim=pass (2048-bit key) header.d=linux.org.uk header.i=@linux.org.uk header.b=C4F2CJUG; arc=none smtp.client-ip=62.89.141.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zeniv.linux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=ftp.linux.org.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linux.org.uk header.i=@linux.org.uk header.b="C4F2CJUG" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=linux.org.uk; s=zeniv-20220401; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=UIq0QwS9m8Vn34cqT2JX2YbbXgMu17lIdfl6g487i/A=; b=C4F2CJUGwfl5xKazpWoseKj1wE WRgOlgnpACsA11o9vsmsB1IEgIxOgcMlpETmH2q+Pkmy5QKe6KOUTqNF+mzjFAZmW6fSabyetV2cW sg4PJwBvnYadtSQUsssgLJfv23FCBmBzKfIJqAjEkjJ8j6aMfSc6ff579wCMlKgyGVa+578BhJf+3 aqYDiA+xagJzyAsdmYZ+Gofucv2YCBS1b4uUF8Ws6ne0a/OJF3nk0dr/nzPgMKLe6ZYQlNMD2P5vh 7swJk2/OoPqvxRHMKexP/fcSrQDpePjfupzXW1wLMs+uMptCrx8erMt988UpqDtoAY4rWS8q83sDm jWgor8qg==; Received: from viro by zeniv.linux.org.uk with local (Exim 4.99.2 #2 (Red Hat Linux)) id 1wU6Vx-00000003Mll-0wOR; Mon, 01 Jun 2026 17:33:25 +0000 Date: Mon, 1 Jun 2026 18:33:25 +0100 From: Al Viro To: Linus Torvalds Cc: Christian Brauner , Askar Safin , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-api@vger.kernel.org, netdev@vger.kernel.org, Matthew Wilcox , Jens Axboe , Christoph Hellwig , David Howells , Andrew Morton , David Hildenbrand , Pedro Falcato , Miklos Szeredi , patches@lists.linux.dev, linux-fsdevel@vger.kernel.org, Jan Kara , Steven Rostedt Subject: Re: [PATCH 0/3] vmsplice: make vmsplice a trivial wrapper for preadv2/pwritev2 Message-ID: <20260601173325.GH2636677@ZenIV> References: <20260531010107.1953702-1-safinaskar@gmail.com> <20260601-enthusiasmus-canceln-anlehnen-0e62317a9784@brauner> Precedence: bulk X-Mailing-List: linux-api@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: Sender: Al Viro On Mon, Jun 01, 2026 at 10:17:23AM -0700, Linus Torvalds wrote: > TLDR: maybe we could ghet rid of "f_op->splice_read". *That* would be > a big simplification. FUSE might be interesting - fuse_dev_splice_read() and its ilk. Communications between the kernel and fuse server at least used to seriously want that, so that would be one place to look for unhappy userland... splice-related logics in fs/fuse/dev.c is interesting; another place like this is kernel/trace/, but I'm less familiar with that one. rostedt Cc'd (miklos already had been)