linux-kernel - Re: c88d71508e ("x86/boot/64: Rewrite startup_64() in C"): BUG: kernel reboot-without-warning in early-boot stage, last printk: Booting the kernel.

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Message-ID: <20170616092742.3yoeaba6thmyxguu@node.shutemov.name>
Date:   Fri, 16 Jun 2017 12:27:42 +0300
From:   "Kirill A. Shutemov" <kirill@...temov.name>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     kernel test robot <fengguang.wu@...el.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        LKP <lkp@...org>, linux-kernel@...r.kernel.org,
        wfg@...ux.intel.com, Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: c88d71508e ("x86/boot/64: Rewrite startup_64() in C"): BUG:
 kernel reboot-without-warning in early-boot stage, last printk: Booting the
 kernel.

On Fri, Jun 16, 2017 at 10:16:30AM +0200, Ingo Molnar wrote:
> 
> * kernel test robot <fengguang.wu@...el.com> wrote:
> 
> > Greetings,
> > 
> > 0day kernel testing robot got the below dmesg and the first bad commit is
> > 
> > https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> > 
> > commit c88d71508e36b514413464bd2e01f96f34583a0e
> > Author:     Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> > AuthorDate: Tue Jun 6 14:31:26 2017 +0300
> > Commit:     Ingo Molnar <mingo@...nel.org>
> > CommitDate: Tue Jun 13 08:56:54 2017 +0200
> > 
> >     x86/boot/64: Rewrite startup_64() in C
> >     
> >     The patch write most of startup_64 logic in C.
> >     
> >     This is preparation for 5-level paging enabling.
> >     
> >     Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> 
> Kirill, should I drop the 5-level paging series for now, or is there a fix in the 
> works?

I'm looking into this.

-- 
 Kirill A. Shutemov