Subject: Re: [regression, bisected] x86: efi: Pass boot services variable
 info to runtime code
From: joeyli <jlee@suse.com>
To: Dave Jones <davej@redhat.com>
Cc: Russ Anderson <rja@sgi.com>, Robin Holt <holt@sgi.com>,
        Matt Fleming <matt@console-pimps.org>,
        Matthew Garrett <matthew.garrett@nebula.com>, matt.fleming@intel.com,
        linux-efi@vger.kernel.org, x86@kernel.org,
        linux-kernel@vger.kernel.org, Ingo Molnar <mingo@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        "H. Peter Anvin" <hpa@linux.intel.com>, Borislav Petkov <bp@alien8.de>
In-Reply-To: <20130524210534.GA15466@redhat.com>
References: <20130522162747.GA20816@sgi.com>
	 <20130523115801.GJ14575@console-pimps.org> <20130523203234.GD20913@sgi.com>
	 <20130524074331.GL14575@console-pimps.org> <20130524161111.GE3672@sgi.com>
	 <20130524170214.GA30179@sgi.com>  <20130524210534.GA15466@redhat.com>
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Date: Mon, 27 May 2013 12:27:12 +0800
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Hi Dave, 

於 五，2013-05-24 於 17:05 -0400，Dave Jones 提到：
> On Fri, May 24, 2013 at 12:02:15PM -0500, Russ Anderson wrote:
>  > On Fri, May 24, 2013 at 11:11:11AM -0500, Robin Holt wrote:
>  > > Russ,
>  > > 
>  > > Can we open a bug for the BIOS folks and see if we can get this addressed?
>  > 
>  > I already talked with them.  It is not in an area that we
>  > normally change, so if there is a bug may be in the Intel
>  > reference code.  More investigation is needed to track down
>  > the actual problem, and that could take help from Intel.
>  > 
>  > Regardless of that, it is a kernel patch that triggers the
>  > problem.  This isn't the first time a kernel change does
>  > the "right thing" but trips across questionable bios/EFI/bootloader
>  > implementation.  That still makes it a kernel bug.
>  > 
>  > I'm still digging to better understand the root problem.
>  
> When we rebased the Fedora 18 kernel to 3.9 we had a bunch of reports
> from people who can no longer boot with what looks like similar symptoms.
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=964335
> 
> 	Dave
> 

The oops on the above bug is similar to my problem on Acer machine,
could you please ask the reporter try the eccaf52f patch in urgent
branch on Matt's efi git tree:

https://git.kernel.org/cgit/linux/kernel/git/mfleming/efi.git/commit/?h=urgent&id=eccaf52fee8305d5207ff110950a82c100e459bc


Thanks!
Joey Lee

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