linux-kernel - Re: [PATCH] PCI: conditional resource-reallocation through kernel parameter pci=realloc

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Message-ID: <20110706090638.GA29266@ram-ThinkPad-T61>
Date:	Wed, 6 Jul 2011 02:06:38 -0700
From:	Ram Pai <linuxram@...ibm.com>
To:	jbarnes@...tuousgeek.org, torvalds@...ux-foundation.org
Cc:	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	yinghai@...nel.org
Subject: Re: [PATCH] PCI: conditional resource-reallocation through kernel
 parameter pci=realloc

On Thu, Jun 30, 2011 at 01:09:39AM -0700, Ram Pai wrote:
> Multiple attempts to dynamically reallocate pci resources have unfortunately
> lead to regressions. Though we continue to fix the regressions and fine tune the
> dynamic-reallocation behavior, we have not reached a acceptable state yet.
> 
> This patch provides a interim solution. It disables dynamic-reallocation; by
> default, with the ability to enable it through pci=realloc kernel command line
> parameter.

> 
> Signed-off-by: Ram Pai <linuxram@...ibm.com>
> ---
>  Documentation/kernel-parameters.txt |    2 ++
>  arch/x86/pci/common.c               |    4 ++++
>  drivers/pci/setup-bus.c             |    7 +++++++
>  include/linux/pci.h                 |    2 ++
>  4 files changed, 15 insertions(+), 0 deletions(-)
> 
> diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
> index fd248a3..aa47be7 100644
> --- a/Documentation/kernel-parameters.txt
> +++ b/Documentation/kernel-parameters.txt
> @@ -2015,6 +2015,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
>  				the default.
>  				off: Turn ECRC off
>  				on: Turn ECRC on.
> +		realloc		reallocate PCI resources if allocations done by BIOS
> +				are erroneous.
> 
>  	pcie_aspm=	[PCIE] Forcibly enable or disable PCIe Active State Power
>  			Management.

Linus/Jesse,

	Are we merging this patch in 3.0.0 ?

RP
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