From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752797AbcCLM13 (ORCPT ); Sat, 12 Mar 2016 07:27:29 -0500 Received: from mail.skyhub.de ([78.46.96.112]:42141 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750954AbcCLM1Y (ORCPT ); Sat, 12 Mar 2016 07:27:24 -0500 Date: Sat, 12 Mar 2016 13:27:04 +0100 From: Borislav Petkov To: "Bryan O'Donoghue" Cc: Linus Torvalds , Ingo Molnar , Andy Lutomirski , Andy Shevchenko , "linux-kernel@vger.kernel.org" , "x86@kernel.org" , Fenghua Yu , "H. Peter Anvin" , Thomas Gleixner , Andrew Morton , Dave Hansen , Oleg Nesterov , "Yu, Yu-cheng" Subject: Re: [PATCH] x86/FPU: Fix FPU handling on legacy FPU machines Message-ID: <20160312122704.GB23410@pd.tnic> References: <20160310145940.GB26708@pd.tnic> <20160311090840.GA8486@gmail.com> <20160311094802.GA4312@pd.tnic> <1457694124.2007.12.camel@nexus-software.ie> <20160311112610.GC4312@pd.tnic> <20160311113206.GD4312@pd.tnic> <20160311220313.GG4312@pd.tnic> <1457784289.2007.19.camel@nexus-software.ie> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <1457784289.2007.19.camel@nexus-software.ie> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Mar 12, 2016 at 12:04:49PM +0000, Bryan O'Donoghue wrote: > Busy with the dayjob :) so I haven't updated on Galileo since > > 4b696dcb1a55e40648ad0eec4af991c72f945a85 (Feb 28 or so) That's 4.5-rc5-ish and the FPU rewrite came during 4.2. BUT!, 58122bf1d856 x86/fpu: Default eagerfpu=on on all CPUs which is in tip currently, made eagerfpu default and we know that eagerfpu=off makes the issue go away. So the bug was there, just it wasn't being hit on Quark. Until 58122bf1d856... -- Regards/Gruss, Boris. ECO tip #101: Trim your mails when you reply.