From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S3000122AbdD2Pvz (ORCPT ); Sat, 29 Apr 2017 11:51:55 -0400 Received: from scorn.kernelslacker.org ([45.56.101.199]:39032 "EHLO scorn.kernelslacker.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161076AbdD2Pvn (ORCPT ); Sat, 29 Apr 2017 11:51:43 -0400 Date: Sat, 29 Apr 2017 11:51:40 -0400 From: Dave Jones To: Al Viro Cc: Linux Kernel Subject: Re: iov_iter_pipe warning. Message-ID: <20170429155140.cu65ywznh3vgn3lo@codemonkey.org.uk> Mail-Followup-To: Dave Jones , Al Viro , Linux Kernel References: <20170412170723.GQ29622@ZenIV.linux.org.uk> <20170412190318.srkkdytf2ebrjzrg@codemonkey.org.uk> <20170421175430.GT29622@ZenIV.linux.org.uk> <20170428152955.mafs3f22srmm34aw@codemonkey.org.uk> <20170428164313.GK29622@ZenIV.linux.org.uk> <20170428165024.ofyl2atpjwohekqa@codemonkey.org.uk> <20170428172024.GL29622@ZenIV.linux.org.uk> <20170428182511.GM29622@ZenIV.linux.org.uk> <20170429015847.p5gpz5px6vybewvs@codemonkey.org.uk> <20170429024736.GP29622@ZenIV.linux.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170429024736.GP29622@ZenIV.linux.org.uk> User-Agent: NeoMutt/20170306 (1.8.0) X-Spam-Note: SpamAssassin invocation failed Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Apr 29, 2017 at 03:47:36AM +0100, Al Viro wrote: > On Fri, Apr 28, 2017 at 09:58:47PM -0400, Dave Jones wrote: > > On Fri, Apr 28, 2017 at 07:25:12PM +0100, Al Viro wrote: > > > On Fri, Apr 28, 2017 at 06:20:25PM +0100, Al Viro wrote: > > > > On Fri, Apr 28, 2017 at 12:50:24PM -0400, Dave Jones wrote: > > > > > currently running v4.11-rc8-75-gf83246089ca0 > > > > > > > > > > sunrpc bit is for the other unrelated problem I'm chasing. > > > > > > > > > > note also, I saw the backtrace without the fs/splice.c changes. > > > > > > > > Interesting... Could you add this and see if that triggers? > > > > > > Gyah... It's a bloody dumb braino in iov_iter_revert() for pipe-backed > > > ones. Sorry, the oneliner below should fix it. > > > > 5 hrs in, looking good so far. > > Mind your Tested-by on the fix? Sure. Tested-by: Dave Jones