linux-kernel - Re: Linux 2.6.27-rc5: System boot regression caused by commit a2bd7274b47124d2fc4dfdb8c0591f545ba749dd

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Date:	Sat, 30 Aug 2008 15:41:13 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Yinghai Lu <yhlu.kernel@...il.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, 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.

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.

		Linus
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