From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 826C9EB64D9 for ; Fri, 30 Jun 2023 00:02:01 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E89B18D0002; Thu, 29 Jun 2023 20:02:00 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id E39D48D0001; Thu, 29 Jun 2023 20:02:00 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D01828D0002; Thu, 29 Jun 2023 20:02:00 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id BD5B48D0001 for ; Thu, 29 Jun 2023 20:02:00 -0400 (EDT) Received: from smtpin05.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 6D07040382 for ; Fri, 30 Jun 2023 00:02:00 +0000 (UTC) X-FDA: 80957461200.05.B1BEA0C Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf25.hostedemail.com (Postfix) with ESMTP id A8150A001F for ; Fri, 30 Jun 2023 00:01:58 +0000 (UTC) Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=LWmFFlvh; dmarc=pass (policy=none) header.from=kernel.org; spf=pass (imf25.hostedemail.com: domain of kuba@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=kuba@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1688083318; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=Bej09wYFcT6D4FI/gm1ZGuRayoSdiiH2baukOvRvHEQ=; b=xyKoplOQzfJ2Zd/0xM1IWkaHi3KL0Z3/2sJDZFtzzfYgAJrP8R3ma4hbQDzZjTzdsBT1Oo Hia8yZGIH6/0ziWDOlh+khP3yzYICihs7s2I6xulblhurOXP08HboiryORsuZtVku6Tyv0 hPfaXoTQbKD7n+XIY+d8SxFSdOESUzs= ARC-Authentication-Results: i=1; imf25.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=LWmFFlvh; dmarc=pass (policy=none) header.from=kernel.org; spf=pass (imf25.hostedemail.com: domain of kuba@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=kuba@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1688083318; a=rsa-sha256; cv=none; b=4h4w8QPhVexjmKlAsPtxJuCVLjFGJfIEcZEQoKOpOcoWoK8Ko5IVqLOI2KHGuuTjW9Rwir gkwYeMMbdrjH0isp3/nqHKjIC/4cwhEkspX9a9TJETSIE7fmCVym9mM3fsl6mc4I7rLhHQ FifPbGWe9ccryoN1NKMLRRIZHukVlbo= Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 908A361662; Fri, 30 Jun 2023 00:01:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A1B16C433C8; Fri, 30 Jun 2023 00:01:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1688083317; bh=Bej09wYFcT6D4FI/gm1ZGuRayoSdiiH2baukOvRvHEQ=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=LWmFFlvh/aXLzdmV/dcJn2GkigvCiQc4jA7nQOHqgG2p9NVoIcuBPwtlHgVSDIK/+ P6tfAOINFIzPaS1CaW8XWgs/r6B6QCZJV0uCr1+EwSz450QpPBHiYM8ZYeinUqLrjP TiQQSKO7TvNHS4zAQCm0eMEsYBGHFik9pPojQBGLctgE0iSVu68gKlwsSqUEZvqwBy R+DNMVdyT3OyWCZQX9nkVqe15fOYjfFX9PiwIhu3tbUwqFoqmjEAzN5TxOIX9EjOL5 WQP6ONBI2NMuVu1siTtZGqMAnS2FpBpqCzpPPwqtoad0MWatYvMk+VYlhYrVIcHtr0 ZePiyxj0S2FAQ== Date: Thu, 29 Jun 2023 17:01:55 -0700 From: Jakub Kicinski To: David Howells Cc: netdev@vger.kernel.org, Matthew Wilcox , Dave Chinner , Matt Whitlock , Linus Torvalds , Jens Axboe , linux-fsdevel@kvack.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH 0/4] splice: Fix corruption in data spliced to pipe Message-ID: <20230629170155.175d71aa@kernel.org> In-Reply-To: <20230629155433.4170837-1-dhowells@redhat.com> References: <20230629155433.4170837-1-dhowells@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: A8150A001F X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: k3s9fi1aan894senri8anfiif44ybhew X-HE-Tag: 1688083318-716392 X-HE-Meta: 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 jm9Ege3v DreBeV+CG8Ubs8F0HqThWssihE8TImd6JE2DhA7yy0teDprZ7vrKaH8L0oh8HqAbWCBcjFdcjFH6Ez8gS788PfXbdC90odHPSLq0amtFQb0U/kiZRd1lNkWpFT1jrzU5fRbBK3vaQkytrs4U6LLBxqFJ9ByA1RHYe+nWbdJlPIOAbMMG+JjTFOA7T+5iQ/cXtLgozbSpn3RK/iZ5Zy9hYfhrWnU4ASo7yuomUgETvFA9DI0dqQ0KI1XZOUN9XR053+MqoBsSFEheQMgxmKlvDrLKLCc/2ClBzqyLF 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: On Thu, 29 Jun 2023 16:54:29 +0100 David Howells wrote: > I'm more inclined to adjust the documentation since the behaviour we > have has been that way since 2005, I think. +1 FWIW I think that networking always operated under the assumption that the pages may change. In TLS we require explicit opt-in from users that the pages they send will not get changed, if it could cause crypto errors (TLS_TX_ZEROCOPY_RO).