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=-8.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 D23F8C388F9 for ; Tue, 27 Oct 2020 08:07:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5101C20780 for ; Tue, 27 Oct 2020 08:07:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="Z/42g85E" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2894389AbgJ0IHu (ORCPT ); Tue, 27 Oct 2020 04:07:50 -0400 Received: from casper.infradead.org ([90.155.50.34]:34132 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729144AbgJ0IHt (ORCPT ); Tue, 27 Oct 2020 04:07:49 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=tP+Tygnqk+POwnifrL6U3LGD+YGYZBiKxYocZhRiZfI=; b=Z/42g85E2JDMNAl24NCigLPUbi eYimZsjIqfHVvR9A1oY/y84OplWG0FbaYiS4stoykdxuUVhV6ljzVLyC+pfpdE9xAKD8nUWYBL8nd j22FYevgAgDxroZa9s3P5zVzDCuZyXa5jQy0Ze2MTM+LnkPcTDSGVIEZDdtWIF2y5lZNNnTYLQpTB 7ZyJ1yJdDJwmDpRRzAh38UBI0nV+7RfHXNmWpOAalzt3BdN140hHXqWrmHET+GQdgeIlvEUrLLzDD 7msyhNdx7mspnUv0gbLUDbXxI36kd0HydZf/i5Vh+0aPpIOnk+73e33sR67vthb8kKMWF5p+756y9 jDc6DMYw==; Received: from hch by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kXK1B-0000fp-Q9; Tue, 27 Oct 2020 08:07:45 +0000 Date: Tue, 27 Oct 2020 08:07:45 +0000 From: Christoph Hellwig To: Greg KH Cc: Christoph Hellwig , Linus Torvalds , Al Viro , Linux Kernel Mailing List Subject: Re: problems with splice from /proc (was Linux 5.10-rc1) Message-ID: <20201027080745.GA31045@infradead.org> References: <20201027064832.GA209538@kroah.com> <20201027074911.GB29565@infradead.org> <20201027075541.GA24429@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201027075541.GA24429@kroah.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Oct 27, 2020 at 08:55:41AM +0100, Greg KH wrote: > This is just a test, part of the bionic test suite to verify that bionic > is working properly, and is run on new kernels as a verification that > nothing functional broke in the kernel update. > > I don't know about "real applications" yet. > > Do you have to implement this on a per-proc-file-basis, or will it work > for the whole filesystem? > > And are the patches public anywhere that I could test them out? This all branch has the last posted version: http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/set_fs-rw.2 with tthe proc:, sysctl: and seq_file: patches related to it. It did switch over all seq_file instances, but non-seq_file instances and write operations will need manual per-instance work.