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Message-ID: <86802c440808301550s627dfcb0h7ff8971c8248703a@mail.gmail.com>
Date:	Sat, 30 Aug 2008 15:50:01 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Jordan Crouse" <jordan.crouse@....com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Jeff Garzik" <jeff@...zik.org>, "Tejun Heo" <htejun@...il.com>,
	"Ingo Molnar" <mingo@...e.hu>,
	"David Witbrodt" <dawitbro@...global.net>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Kernel Testers" <kernel-testers@...r.kernel.org>
Subject: Re: Linux 2.6.27-rc5: System boot regression caused by commit a2bd7274b47124d2fc4dfdb8c0591f545ba749dd

On Sat, Aug 30, 2008 at 3:41 PM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
>
> On Sat, 30 Aug 2008, Yinghai Lu wrote:
>>
>> in old kernel, after BAR3 request_filed, pci_assigned_unassigned
>> should get update resource for that... but it could find that big
>> space for it.

wait, THAT BAR is 64BIT capable, So kernel should assign 64bit range to it...
it request_resource fails...

>
> Exactly. So what happens is that it doesn't actually re-allocate it at
> all. Not that it is necessarily even possible - it's quite possible that
> that field is effectively locked some way and is read-only. Without
> knowing the chipset details, we can only guess.

not touch it at this time...

except Jordan could find some clue with the DOC.

YH
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