linux-kernel - Re: [PATCH] x86/pci: make pci_mem

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Message-ID: <49E76A92.7040203@zytor.com>
Date:	Thu, 16 Apr 2009 10:27:46 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-pci@...r.kernel.org, yannick.roehlly@...e.fr
Subject: Re: [PATCH] x86/pci: make pci_mem_start to be aligned only -v3

Yinghai Lu wrote:
> 
> that need to do done much earlier, and much simple, just need to make that range to be reserved in e820.
> and later e820_setup_gap even don't need to be aligned again.
> 

As long as that doesn't cause the PCI layer to move devices already
assigned in this range out of it.  What we want is really a "weak
reserve".  On the other hand, that may very well be the semantics of the
existing reserved space, too (I honestly haven't looked lately.)

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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