linux-kernel - Re: [PATCH v4 6/6] x86: allocate space within a region top-down

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Message-Id: <201010251508.49165.bjorn.helgaas@hp.com>
Date:	Mon, 25 Oct 2010 15:08:48 -0600
From:	Bjorn Helgaas <bjorn.helgaas@...com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	Bob Picco <bpicco@...hat.com>,
	Brian Bloniarz <phunge0@...mail.com>,
	Charles Butterfield <charles.butterfield@...tcentury.com>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	linux-pci@...r.kernel.org,
	"Horst H. von Brand" <vonbrand@....utfsm.cl>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	Stefan Becker <chemobejk@...il.com>,
	"H. Peter Anvin" <hpa@...or.com>, Yinghai Lu <yinghai@...nel.org>,
	Leann Ogasawara <leann.ogasawara@...onical.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH v4 6/6] x86: allocate space within a region top-down

On Monday, October 25, 2010 03:01:54 pm Jesse Barnes wrote:
> On Thu, 14 Oct 2010 17:18:52 -0600
> Bjorn Helgaas <bjorn.helgaas@...com> wrote:
> 
> > 
> > Request that allocate_resource() use available space from high addresses
> > first, rather than the default of using low addresses first.
> > 
> > The most common place this makes a difference is when we move or assign
> > new PCI device resources.  Low addresses are generally scarce, so it's
> > better to use high addresses when possible.  This follows Windows practice
> > for PCI allocation.
> 
> Applied this series to linux-next; assuming nothing blows up I'll send
> it to Linus this week (previous versions got some testing and landed in
> a separate branch so this should be fine).

We tripped over another issue in Fedora:
  https://bugzilla.redhat.com/show_bug.cgi?id=646027

I think I see the problem, and posted a patch for testing.  When it's
resolved, I'll post an updated series.

Bjorn
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