From: Stephen Rothwell <sfr@canb.auug.org.au>
To: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Ram Pai <linuxram@us.ibm.com>,
torvalds@linux-foundation.org, linux-pci@vger.kernel.org,
linux-kernel@vger.kernel.org, yinghai@kernel.org
Subject: Re: [PATCH] PCI: conditional resource-reallocation through kernel parameter pci=realloc
Date: Thu, 7 Jul 2011 11:00:32 +1000 [thread overview]
Message-ID: <20110707110032.226a16c3b553de67125cf70b@canb.auug.org.au> (raw)
In-Reply-To: <20110706090733.1158d959@jbarnes-desktop>
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Hi Jesse,
On Wed, 6 Jul 2011 09:07:33 -0700 Jesse Barnes <jbarnes@virtuousgeek.org> wrote:
>
> On Wed, 6 Jul 2011 02:06:38 -0700
> Ram Pai <linuxram@us.ibm.com> wrote:
>
> > 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@us.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 ?
>
> Yeah I think we probably should, since the alternative is still pretty
> large.
>
> I'll queue it up with any other small patches that are needed at this
> point and send them over to Linus.
It breaks the powerpc build (see my other message).
--
Cheers,
Stephen Rothwell sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/
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prev parent reply other threads:[~2011-07-07 1:00 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-30 8:09 [PATCH] PCI: conditional resource-reallocation through kernel parameter pci=realloc Ram Pai
2011-06-30 17:04 ` Oliver Hartkopp
2011-06-30 17:07 ` Jesse Barnes
2011-06-30 17:12 ` Oliver Hartkopp
2011-06-30 18:38 ` Ram Pai
2011-06-30 20:24 ` Bjorn Helgaas
2011-06-30 20:26 ` Jesse Barnes
2011-07-06 9:06 ` Ram Pai
2011-07-06 16:07 ` Jesse Barnes
2011-07-07 1:00 ` Stephen Rothwell [this message]
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