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

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Message-ID: <20110608213603.GA630@srcf.ucam.org>
Date:	Wed, 8 Jun 2011 22:36:03 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	"H. Peter Anvin" <hpa@...ux.intel.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Yinghai Lu <yinghai@...nel.org>, Jim Bos <jim876@...all.nl>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Maarten Lankhorst <m.b.lankhorst@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Greg KH <gregkh@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: 2.6.39.1 immediately reboots/resets on EFI system

On Wed, Jun 08, 2011 at 02:31:38PM -0700, H. Peter Anvin wrote:
> On 06/08/2011 02:28 PM, Matthew Garrett wrote:
> > 
> > E820 limits us to 128 ranges, and systems I'm looking at right now are 
> > already using over 140 boot services regions. Some of them are 
> > contiguous and we could just merge them for e820, but that leaves us at 
> > the whim of whoever wrote the allocator for the firmware. And do you 
> > want to bet on them having done this sanely?
> > 
> 
> No, we're not limited to 128.  We're limited to 128 in the boot
> structure, but more can be passed via the linked list.

Oh, ok, that's not as bad as I thought. We're still potentially losing a 
pile of memory, but...

-- 
Matthew Garrett | mjg59@...f.ucam.org
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