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

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Message-ID: <alpine.LFD.1.10.0808292017440.5010@nehalem.linux-foundation.org>
Date:	Fri, 29 Aug 2008 20:24:52 -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 Fri, 29 Aug 2008, Yinghai Lu wrote:
> 
> we need to use insert_resource_split_to_fit instead...
> 
> otherwise __request_region will not be happy.

Are you really really sure?

Try just removing the IORESOURCE_BUSY. As mentioned, if we expect the PCI 
BAR's to work with the e820 resources, then BUSY really is simply not 
right any more. Not that I think it should matter either..

The ones that are added _early_ should be IORESOURCE_BUSY (ie the ones 
that cover RAM), but the others we now expect to nest with PCI BARs.

But since we add them after we have parsed the BAR's, I don't even see why 
the BUSY bit should even matter - we've already added the fixed BARs, and 
any newly allocated non-fixed ones shouldn't be allocated in e820 areas 
_regardless_ of whether the BUSY bit is set or not.

So pls explain why it matters?

		Linus
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