linux-kernel - Re: 2.6.39.1 immediately reboots/resets on EFI system

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Date:	Sun, 05 Jun 2011 12:40:36 +0200
From:	Jim Bos <jim876@...all.nl>
To:	Matthew Garrett <mjg59@...f.ucam.org>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Greg KH <gregkh@...e.de>,
	"H. Peter Anvin" <hpa@...ux.intel.com>
Subject: Re: 2.6.39.1 immediately reboots/resets on EFI system

On 06/03/2011 04:46 PM, Matthew Garrett wrote:
> On Fri, Jun 03, 2011 at 04:26:27PM +0200, Jim Bos wrote:
>> On 06/03/2011 03:33 PM, Matthew Garrett wrote:
>>> ? You've got 143 boot services/code regions, which is more than I'd 
>>> tested against, so I'm unsure whether we're overflowing something here.
>>>
>>
>> That's seems to be the only EFI patch in 2.6.39.1 and I effectively
>> removed by =not= applying (skipping) the parts of the 2.6.39.1 patch to
>> above 3 files.
>> So yes removing "x86, efi: Retain boot service code until after
>> switching to virtual mode" indeed fixes the problem for me.
> 
> Ok, thanks. I'll look into that. Might be best to drop it from stable 
> for the moment until I've made sure it works on machines with excessive 
> maps.
> 

Matthew,

Another datapoint, just tried a 3.0.0-rc1 kernel, good news is that it
boots.  Maybe the "x86, efi: Merge contiguous memory regions of the same
type" helps with these large number of maps?

However, there seems to be something else wrong as I get several "BUG:
Bad page state in process swapper  pfn:00000" which have efi functions
on the stack, see dmesg output.

Jim

Download attachment "dmesg-3.0.0-rc1-EFI-bad_pages.gz" of type "application/gzip" (12132 bytes)