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 X-Spam-Level: X-Spam-Status: No, score=-6.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BD88AC2D0E4 for ; Tue, 24 Nov 2020 20:15:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5060C20897 for ; Tue, 24 Nov 2020 20:15:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="kahRTY2x" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730430AbgKXUPG (ORCPT ); Tue, 24 Nov 2020 15:15:06 -0500 Received: from mail.kernel.org ([198.145.29.99]:57646 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730408AbgKXUPF (ORCPT ); Tue, 24 Nov 2020 15:15:05 -0500 Received: from mail-ot1-f50.google.com (mail-ot1-f50.google.com [209.85.210.50]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4A96220897; Tue, 24 Nov 2020 20:15:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1606248905; bh=1uE3OiCzLGLIZAGr9pL2rVM5ax6NdKMufsqI16g8Phg=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=kahRTY2xTKQf43H0i9dFH/aINLhMv6NuS/vq6a+aQuaTi7qLRIMUtLP4a4cL/6fxk /KL5zcGhnJ01ZqG0PIAca5aZmFgvZ3Slwyxp4ktgBUZuJ9C8WVdzkL0+DwrdZpeDPn dYCJq7IwG3QdYXMfmh0C5MIY8kveD/o5wslo4rQc= Received: by mail-ot1-f50.google.com with SMTP id 79so36648otc.7; Tue, 24 Nov 2020 12:15:05 -0800 (PST) X-Gm-Message-State: AOAM531fZ1HYWE4E5ABbH0qmQizNC9QAcf7qWLZYl6ghTX2kYDQ/BscF HagtWlBT5rIWY3SiDWyUcAj3zitab3xJBAHAtAM= X-Google-Smtp-Source: ABdhPJzCz6LUoJRBkoGcpndiBFsOlruR8AoE+WOG4FWfG4gad/1eooLu5DK7ErHqUIxy141UTZnr9Dys81t4JI1eD3o= X-Received: by 2002:a9d:6317:: with SMTP id q23mr203752otk.251.1606248904500; Tue, 24 Nov 2020 12:15:04 -0800 (PST) MIME-Version: 1.0 References: <87r1on1v62.fsf@x220.int.ebiederm.org> <20201120231441.29911-2-ebiederm@xmission.com> <20201123175052.GA20279@redhat.com> <87im9vx08i.fsf@x220.int.ebiederm.org> <87pn42r0n7.fsf@x220.int.ebiederm.org> In-Reply-To: From: Arnd Bergmann Date: Tue, 24 Nov 2020 21:14:48 +0100 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v2 02/24] exec: Simplify unshare_files To: Linus Torvalds Cc: "Eric W. Biederman" , Oleg Nesterov , Linux Kernel Mailing List , linux-fsdevel , Alexander Viro , Michael Ellerman , Arnd Bergmann , Geoff Levand Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Nov 24, 2020 at 8:58 PM Linus Torvalds wrote: > > On Tue, Nov 24, 2020 at 11:55 AM Eric W. Biederman > wrote: > > > > If cell happens to be dead we can remove a fair amount of generic kernel > > code that only exists to support cell. > > Even if some people might still use cell (which sounds unlikely), I > think we can remove the spu core dumping code. The Cell blade hardware (arch/powerpc/platforms/cell/) that I'm listed as a maintainer for is very much dead, but there is apparently still some activity on the Playstation 3 that Geoff Levand maintains. Eric correctly points out that the PS3 firmware no longer boots Linux (OtherOS), but AFAIK there are both users with old firmware and those that use a firmware exploit to run homebrew code including Linux. I would assume they still use the SPU and might also use the core dump code in particular. Let's see what Geoff thinks. Arnd