From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1751958AbdH2J1Y (ORCPT <rfc822;w@1wt.eu>);
        Tue, 29 Aug 2017 05:27:24 -0400
Received: from mail-wr0-f179.google.com ([209.85.128.179]:32968 "EHLO
        mail-wr0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1751323AbdH2J1W (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Tue, 29 Aug 2017 05:27:22 -0400
Date: Tue, 29 Aug 2017 11:27:19 +0200
From: Ingo Molnar <mingo@kernel.org>
To: Mike Galbraith <efault@gmx.de>
Cc: Kees Cook <keescook@chromium.org>, LKML <linux-kernel@vger.kernel.org>,
        Ingo Molnar <mingo@elte.hu>, Josh Poimboeuf <jpoimboe@redhat.com>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Thomas Gleixner <tglx@linutronix.de>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Elena Reshetova <elena.reshetova@intel.com>,
        Arnd Bergmann <arnd@arndb.de>, "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: tip -ENOBOOT - bisected to locking/refcounts, x86/asm: Implement
 fast refcount overflow protection
Message-ID: <20170829092718.amahzkaobfnnfvxq@gmail.com>
References: <1503996623.8323.20.camel@gmx.de>
 <20170829085841.gwmdbncrm6txcezt@gmail.com>
 <1503998491.8323.23.camel@gmx.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <1503998491.8323.23.camel@gmx.de>
User-Agent: NeoMutt/20170113 (1.7.2)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org


* Mike Galbraith <efault@gmx.de> wrote:

> On Tue, 2017-08-29 at 10:58 +0200, Ingo Molnar wrote:
> > * Mike Galbraith <efault@gmx.de> wrote:
> > 
> > > Greetings,
> > > 
> > > Take 2 of KVM bisect as you work fingered $subject.  Take 1 was stymied
> > > by build dependencies (aa5d1b81, df340524) which I foolishly tried to
> > > skip, leading git bisect to end up handing me a list of commits that
> > > might be busted.  During take 2, I added those two as required.
> > > 
> > > Symptom is a few splats as below, with box finally hanging.  Network
> > > comes up, but neither ssh nor console login is possible.
> > 
> > Just to double check, does the patch below also cure the regression?
> > If we don't find the bug it might be safer than a full revert.
> 
> I reverted it, and vbox now boots.  Should I still try the below?

Would be nice, so I can stick a Tested-by on it and such!

Thanks,

	Ingo