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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A73E0C6FD1F for ; Tue, 14 Mar 2023 19:15:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229875AbjCNTPh (ORCPT ); Tue, 14 Mar 2023 15:15:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48370 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229823AbjCNTPg (ORCPT ); Tue, 14 Mar 2023 15:15:36 -0400 Received: from mail-ed1-x533.google.com (mail-ed1-x533.google.com [IPv6:2a00:1450:4864:20::533]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9815D34323 for ; Tue, 14 Mar 2023 12:15:27 -0700 (PDT) Received: by mail-ed1-x533.google.com with SMTP id o12so66307183edb.9 for ; Tue, 14 Mar 2023 12:15:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=google; t=1678821326; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=QAToBCAVYt3GcGYadQEhb7AkREOTPXmIkwVjM1uSyZg=; b=bp/1XnEfMOVVgkVuXGDbLCETn1HWQMaGTl5iXTyUBYdJib7zhMpymdp46nponpQ25I /5mW/ubRpskp0aRTdAQUTy35cyausQACNsJ6UgVC19Uhk9GQlBskq6I/bOpy7xrg4X5f DB/JkKjiPbUD8IYU0wsAl2K7siy9t1j9+8psQ= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678821326; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=QAToBCAVYt3GcGYadQEhb7AkREOTPXmIkwVjM1uSyZg=; b=09xzOh+4Z+ai3++Mvqa3rrnoGItPzbhkw2x/O8HbMvPYTrB3lV1cVBdmfYE1SaE0I7 hlx4zMLcLQcG+zLGw5yMBA2AFuUlJAUb5iRmP422K4nxq9af/9VmJdGAJBjCLFaZyFgo k6KkN1vvWwJ+CDUVKqGPN4u162e+prYC09FRL/H3ZxxAPJzU7HYvj0tQICqIP+uAXlhZ OT90qnn7Ua0f8TLKQ4yUbcA6RnvVYV2JkmC0T18EF+6vSS9P9bWWF8gBlsbgXb9rGhqu bO5IivBvdfDYzB4mJ8ZqG3ckTaTctBtkfSGAnAZ6FIsLXQ0Li5xJgGWb6ftt9d4wvAUO Ucow== X-Gm-Message-State: AO0yUKVThoRccmpBCzPFQvja405/bp3blUV8yo3u2TcV7EXK0z3NrHAj J5YIubTrtkl35xeOTenibXXOtqMY1olGUJpnkERaDQ== X-Google-Smtp-Source: AK7set/TtoVjffLODAAGfjG65lODSf7H4R+SH1FuAVeRZs0JErpiJ2aEKEWzu+EVYebUMfI7TyQTig== X-Received: by 2002:a17:906:844f:b0:8bf:e95c:467b with SMTP id e15-20020a170906844f00b008bfe95c467bmr3126162ejy.63.1678821325850; Tue, 14 Mar 2023 12:15:25 -0700 (PDT) Received: from mail-ed1-f53.google.com (mail-ed1-f53.google.com. [209.85.208.53]) by smtp.gmail.com with ESMTPSA id i9-20020a50d749000000b004af6163f845sm1449499edj.28.2023.03.14.12.15.25 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 14 Mar 2023 12:15:25 -0700 (PDT) Received: by mail-ed1-f53.google.com with SMTP id z21so1015883edb.4 for ; Tue, 14 Mar 2023 12:15:25 -0700 (PDT) X-Received: by 2002:a17:907:2069:b0:8af:4963:fb08 with SMTP id qp9-20020a170907206900b008af4963fb08mr1869330ejb.15.1678821000656; Tue, 14 Mar 2023 12:10:00 -0700 (PDT) MIME-Version: 1.0 References: <20230308165251.2078898-1-dhowells@redhat.com> <20230308165251.2078898-4-dhowells@redhat.com> <3761465.1678818404@warthog.procyon.org.uk> In-Reply-To: From: Linus Torvalds Date: Tue, 14 Mar 2023 12:09:43 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v17 03/14] shmem: Implement splice-read To: David Howells Cc: Matthew Wilcox , Jens Axboe , Al Viro , Christoph Hellwig , Jan Kara , Jeff Layton , David Hildenbrand , Jason Gunthorpe , Logan Gunthorpe , Hillf Danton , linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Daniel Golle , Guenter Roeck , Christoph Hellwig , John Hubbard , Hugh Dickins Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Tue, Mar 14, 2023 at 12:07=E2=80=AFPM Linus Torvalds wrote: > > Maybe we can do /dev/null some day and actually have a common case for th= ose. /dev/zero, I mean. We already do splice to /dev/null (and splicing from /dev/null isn't interesting ;) Linus