linux-kernel - Re: [PATCH v1 0/3] [RFC] resource, PCI: work around pci=use

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Message-ID: <1268405377.3493.4.camel@d2>
Date:	Fri, 12 Mar 2010 16:49:37 +0200
From:	Yanko Kaneti <yaneti@...lera.com>
To:	Bjorn Helgaas <bjorn.helgaas@...com>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Renninger <trenn@...e.de>, maciej.rutecki@...il.com
Subject: Re: [PATCH v1 0/3] [RFC] resource, PCI: work around pci=use_crs
 conflicts

On Thu, 2010-03-11 at 17:01 -0700, Bjorn Helgaas wrote:
> These patches are to fix this pci=use_crs regression:
> 
>     http://bugzilla.kernel.org/show_bug.cgi?id=15480
> 
> The problem is that BIOS reported a PCI host bridge window that overlaps
> system RAM.  This workaround trims the window to avoid the overlap, which
> requires information about the conflicting resource.
> 
> Yanko, I reworked these a bit, so if you have a chance to retest them
> and collect another dmesg log, I'd appreciate it.
> 
> I'm still hoping for someone to find out how Windows deals with this, but
> haven't gotten any data yet.
> 
> ---
> 
> Bjorn Helgaas (3):
>       resources: add interfaces that return conflict information
>       x86/PCI: trim _CRS windows when they conflict with previous reservations
>       PCI: for address space collisions, show conflicting resource
> 
> 
>  arch/x86/pci/acpi.c     |   48 ++++++++++++++++++++++++++++++++++-------------
>  drivers/pci/setup-res.c |   14 ++++++++------
>  include/linux/ioport.h  |    2 ++
>  kernel/resource.c       |   44 ++++++++++++++++++++++++++++++++++++-------
>  4 files changed, 82 insertions(+), 26 deletions(-)

Applied on top of latest rawhide kernel. Boots without pci=  workarounds
and works fine so far.
Dmesg attached to the bug report.

Thanks

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