Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Thu, 18 Jan 2018 11:04:48 +0800
From:   Dave Young <dyoung@redhat.com>
To:     Linus Torvalds <torvalds@linux-foundation.org>
Cc:     Arjan van de Ven <arjan@linux.intel.com>,
        Yu Chen <yu.c.chen@intel.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Juergen Gross <jgross@suse.com>,
        Tony Luck <tony.luck@intel.com>,
        Boris Ostrovsky <boris.ostrovsky@oracle.com>,
        Borislav Petkov <bp@alien8.de>,
        Rui Zhang <rui.zhang@intel.com>,
        Dan Williams <dan.j.williams@intel.com>,
        Ingo Molnar <mingo@kernel.org>,
        Kexec Mailing List <kexec@lists.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        ebiederm@redhat.com, Tom Lendacky <thomas.lendacky@amd.com>,
        Baoquan He <bhe@redhat.com>
Subject: Re: kexec reboot fails with extra wbinvd introduced for AME SME
Message-ID: <20180118030448.GA7124@dhcp-128-65.nay.redhat.com>
References: <20171213155746.GA29572@yu-chen.sh.intel.com>
 <20171214092429.GA2004@dhcp-128-65.nay.redhat.com>
 <20180104031537.GA1819@dhcp-128-65.nay.redhat.com>
 <20180117072123.GA1866@dhcp-128-65.nay.redhat.com>
 <CA+55aFxCuz2K_kE3Huu3Ar32LVmWav__2CPL_=zs2g0devx9-Q@mail.gmail.com>
 <20180118014705.GA1812@dhcp-128-65.nay.redhat.com>
 <CA+55aFzc9eXKOdhS-ygQPbr0_N84d8iE8WbSGOWmpJXr1rvDjQ@mail.gmail.com>
 <47fe0d37-93d9-1394-062a-f973a38daa16@linux.intel.com>
 <20180118025702.GA2242@dhcp-128-65.nay.redhat.com>
 <CA+55aFxbkR+9dXu-ECm-Lx8bxpJhq=b60x_WdUS3XB9WzMp9=w@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CA+55aFxbkR+9dXu-ECm-Lx8bxpJhq=b60x_WdUS3XB9WzMp9=w@mail.gmail.com>
User-Agent: Mutt/1.9.1 (2017-09-22)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On 01/17/18 at 07:00pm, Linus Torvalds wrote:
> On Wed, Jan 17, 2018 at 6:57 PM, Dave Young <dyoung@redhat.com> wrote:
> >
> > Could you say more about how to check this? My .config disabled
> > CONFIG_X86_MCE, should this be enabled?
> 
> By all means, try it.
> 
> Some pending machine check exception that we have *not* reacted to,
> and that is pending around kexec boot could very possibly be relevant.
> 
> I forget your exact symptoms. Was it that the _first_ kexec works, but
> the second one hangs? Or was that the other unrelated issue? Or have I
> confused this with some other report entirely?

Yes, 1st kexec works, 2nd hangs.

Rebuilding with MCE enabled now.

Thanks
Dave
> 
>                Linus