linux-kernel - Re: Possible issue with dangling PCI BARs

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Date:	Fri, 14 Dec 2007 21:18:32 -0500
From:	Jon Masters <jonathan@...masters.org>
To:	benh@...nel.crashing.org
Cc:	linux-pci@...ey.karlin.mff.cuni.cz,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: Possible issue with dangling PCI BARs


On Sat, 2007-12-15 at 09:11 +1100, Benjamin Herrenschmidt wrote:
> On Fri, 2007-12-14 at 06:52 -0500, Jon Masters wrote:
> > On Thu, 2007-12-13 at 14:00 +1100, Benjamin Herrenschmidt wrote:
> > > While reworking the powerpc PCI resource management, to make it more
> > > x86-like and use more of the generic code in setup-bus.c and
> > > setup-res.c, I noticed something a bit fishy in the way we deal with
> > > resources that we failed to assign.
> > 
> > On a tangent here, is there a way (other than pci=rom) to ensure greater
> > address space/resource space for PCI resource mappings?
> 
> limit lowmem ? 4g/4g ? 64 bits ? :-)

Oh, I've seen resource allocation fail on x86_64, which is what bothers
me, since this really shouldn't be happening.

Jon.


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