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 C5B68C77B70 for ; Thu, 6 Apr 2023 02:19:20 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 445536B0075; Wed, 5 Apr 2023 22:19:20 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 3F5806B0078; Wed, 5 Apr 2023 22:19:20 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2BDF46B007B; Wed, 5 Apr 2023 22:19:20 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 1C1CF6B0075 for ; Wed, 5 Apr 2023 22:19:20 -0400 (EDT) Received: from smtpin13.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id D10A5120978 for ; Thu, 6 Apr 2023 02:19:19 +0000 (UTC) X-FDA: 80649359238.13.782D4C7 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf12.hostedemail.com (Postfix) with ESMTP id 38A654000E for ; Thu, 6 Apr 2023 02:19:18 +0000 (UTC) Authentication-Results: imf12.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=FHXl4MeN; spf=pass (imf12.hostedemail.com: domain of kuba@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=kuba@kernel.org; dmarc=pass (policy=none) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1680747558; 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=xB+QhMZCinxrvB9ImJZuaXOYXuW0Qq/UPC7VxYefEEU=; b=Ogdwym/GnFH/TeCWsn27P0+plcGW1XA8kNO7RvhPwgtnhsEqbCy/sS8UxibVh843MppWdw 5hL7n5nucqoom2tuWMgUPJwQOM0BwHBix7MWUyG7wsSXj8z0DTQSp113AuHnkNmqMm/bfd BODXZBy1DmsE+yajyH4RtHNMI7NlLQI= ARC-Authentication-Results: i=1; imf12.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=FHXl4MeN; spf=pass (imf12.hostedemail.com: domain of kuba@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=kuba@kernel.org; dmarc=pass (policy=none) header.from=kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1680747558; a=rsa-sha256; cv=none; b=eFJ+zbZiWkrWaVft6odvtzJqhHakh8Sw3+LETftDmly0UOCfsYI+XoKMRFsoUUb7kt+oUc Is+AJyGAAXjLLPTOjE4+6bAl/Q3xpWZN/ET/BIytLkJB2s/qvmMetp5J0x+xivcYKz0njK w9BxziJAjPrukukslG9m/iofXggVqiE= Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 55AC2618D6; Thu, 6 Apr 2023 02:19:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0F9AAC433EF; Thu, 6 Apr 2023 02:19:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1680747556; bh=1nRUB8kn7dBx6kv26QS2b/95TXcbg7BEirY4c1cIg3s=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=FHXl4MeNWtrJ2T3BaSvNeP5v9JGOs+IKsSu76OBsT2BlVKTlVQqvgJ2Njtb/af/c7 viqutAh6LkRabq39fLxnxrtpLwNhwiaVdDM9Q1XgySzykLZCCr+kPoeL8PnIrGsZn3 WeOxlEGNkrqXjst3MC1CGB5AUkZW/4A9ZUidv8F3ueAlhrw7vwZ/qReYaGW9biXB0e wKBhzi8wXuutO7OGIOu4YmYMaNDiqBeQvSSTr6S4krMdPr+fJLK1sFyYrUl5POvYPa Bau71+iNh4jGA6TFOS4XqnFmFkdqrB+9GfTBs0hzXbAKgxd9dMwyS2+HQSCfDxrhcC 2luPkqbAF7GBw== Date: Wed, 5 Apr 2023 19:19:15 -0700 From: Jakub Kicinski To: David Howells Cc: netdev@vger.kernel.org, "David S. Miller" , Eric Dumazet , Paolo Abeni , Willem de Bruijn , Matthew Wilcox , Al Viro , Christoph Hellwig , Jens Axboe , Jeff Layton , Christian Brauner , Chuck Lever III , Linus Torvalds , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH net-next v4 00/20] splice, net: Replace sendpage with sendmsg(MSG_SPLICE_PAGES), part 1 Message-ID: <20230405191915.041c2834@kernel.org> In-Reply-To: <20230405165339.3468808-1-dhowells@redhat.com> References: <20230405165339.3468808-1-dhowells@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 38A654000E X-Stat-Signature: pd88a3jzcsh7p7fa9wfb6un1pgp7b737 X-Rspam-User: X-HE-Tag: 1680747558-451617 X-HE-Meta: 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 hFCwLevU 24rZrb6gwMcig3o1yTSe8yWrzpBt2O3Tl2mTKt44+uMO2zEFqiwC46q8xETUAHRui42NLT/dC8Oup2Czs2hhcrB80f6OU1x7Z0xImaG1KD8ttDlfbvY0aHfw7aVdgXuZPYEXo+N+1mtlHY9AOU5ZyCn9WsHTuM/A0mnrKHt6Fyedl9h4mizyeFVEaLdDTowv9gOTdPjIT++xOaVTz4t0quxyfOebFQe6jOiP2TWgbA2JbX5510B6iyh9UlVOQE3MP3gPYeMBB6BqXFlAWUUNDoCiZiUYEd5KnAFbXbjka7gfNER0EDHwwDGg0+2mXaXJZmThhhGAvHzT72E2RxdP+i/Fq76uI18KQEC6iOpaN7ljHC5Vd0DflWyN/X7y4AzbqEvAFo+WMupuhKtgeXcZcs98QZ2AIpiArxj+gwRrC4bRMKhg= 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 Wed, 5 Apr 2023 17:53:19 +0100 David Howells wrote: > Here's the first tranche of patches towards providing a MSG_SPLICE_PAGES > internal sendmsg flag that is intended to replace the ->sendpage() op with > calls to sendmsg(). MSG_SPLICE is a hint that tells the protocol that it > should splice the pages supplied if it can and copy them if not. Thanks for splitting off a smaller series! My day is out of hours so just a trivial comment, in case kbuild bot hasn't pinged you - this appears to break the build on the relatively recently added page_frag_cache in google's vNIC (gve).