Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753988AbdIHLam (ORCPT ); Fri, 8 Sep 2017 07:30:42 -0400 Received: from ud10.udmedia.de ([194.117.254.50]:52390 "EHLO mail.ud10.udmedia.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751770AbdIHLal (ORCPT ); Fri, 8 Sep 2017 07:30:41 -0400 Date: Fri, 8 Sep 2017 13:30:39 +0200 From: Markus Trippelsdorf To: Ingo Molnar Cc: Borislav Petkov , Thomas Gleixner , Peter Zijlstra , LKML , Ingo Molnar , Andy Lutomirski , Tom Lendacky Subject: Re: Current mainline git (24e700e291d52bd2) hangs when building e.g. perf Message-ID: <20170908113039.GA285@x4> References: <20170906131504.GA282@x4> <20170907062845.GA280@x4> <20170908053534.GA276@x4> <20170908080536.ninspvplibd37fj2@pd.tnic> <20170908091614.nmdxjnukxowlsjja@pd.tnic> <20170908094815.GA278@x4> <20170908103513.npjmb2kcjt2zljb2@gmail.com> <20170908103906.GB278@x4> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170908103906.GB278@x4> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1471 Lines: 38 On 2017.09.08 at 12:39 +0200, Markus Trippelsdorf wrote: > On 2017.09.08 at 12:35 +0200, Ingo Molnar wrote: > > > > * Markus Trippelsdorf wrote: > > > > > On 2017.09.08 at 11:16 +0200, Borislav Petkov wrote: > > > > On Fri, Sep 08, 2017 at 10:05:36AM +0200, Borislav Petkov wrote: > > > > > On Fri, Sep 08, 2017 at 08:26:44AM +0200, Thomas Gleixner wrote: > > > > > > On Fri, 8 Sep 2017, Markus Trippelsdorf wrote: > > > > > > > > > > > > CC+ Borislav. He might have access to such a beast > > > > > > > > > > Can I have /proc/cpuinfo and dmesg pls, in order to see whether I have > > > > > something similar? > > > > > > > > > > Private mail's fine too. > > > > > > > > So I don't have exactly your model - mine is model 2, stepping 3 but I see > > > > something strange too, in dmesg: > > > > > > I'm pretty sure the bug is in the merged 'x86-mm-for-linus' branch: > > > Either Andy's "PCID optimized TLB flushing" (would be my guess) or > > > 'encrypted memory' support by Tom Lendacky. > > > > > > (Bisecting is hard, because sometimes I can compile stuff for over 15 > > > minutes without hitting the bug. At other times the machine locks up > > > hard when starting X11 already.) > > > > Do you have the 72c0098d92ce fix? > > Yes. The bug still happens on the current git tree (which has the fix > already): The bug is definitely caused by Andy Lutomirski's PCID optimized TLB flushing" patches. Tom is off the hook. -- Markus