From: "H. Peter Anvin" <hpa@zytor.com>
To: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Mike Travis <travis@sgi.com>,
Bjorn Helgaas <bjorn.helgaas@hp.com>,
Mike Habeck <habeck@sgi.com>, Ingo Molnar <mingo@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
x86@kernel.org, Jacob Pan <jacob.jun.pan@intel.com>,
Tejun Heo <tj@kernel.org>, LKML <linux-kernel@vger.kernel.org>,
Yinghai <yinghai.lu@oracle.com>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
Myron Stowe <myron.stowe@hp.com>
Subject: Re: [Patch 1/1] x86 pci: Add option to not assign BAR's if not already assigned
Date: Fri, 14 May 2010 16:40:55 -0700 [thread overview]
Message-ID: <4BEDDF87.4040309@zytor.com> (raw)
In-Reply-To: <20100514163347.52822fcb@virtuousgeek.org>
On 05/14/2010 04:33 PM, Jesse Barnes wrote:
>
> As for BIOS coordination for dynamic reallocation, yeah there'd be some
> of that. I think the basic principles would be:
> 1) use BIOS allocations wherever possible
> 2) get an accurate list of available resources from the BIOS for
> potential remapping later
> 3) allocate resources for BARs and devices as late as possible (e.g.
> at driver bind time) to avoid allocating more than we need
>
> But that's a good chunk of work, and as we've seen, PCs in particular
> are really sensitive to having resources moved around too much, so step
> (2) is probably the hardest part.
>
The real problem that I see, as outlined before, has nothing to do with
the BIOS, but rather the interdependencies between resources.
-hpa
next prev parent reply other threads:[~2010-05-14 23:41 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-12 18:14 [Patch 1/1] x86 pci: Add option to not assign BAR's if not already assigned Mike Travis
2010-05-13 18:56 ` Bjorn Helgaas
2010-05-13 19:08 ` H. Peter Anvin
2010-05-13 19:12 ` Mike Travis
2010-05-13 19:13 ` Mike Travis
2010-05-13 19:54 ` Bjorn Helgaas
2010-05-13 20:27 ` Mike Habeck
2010-05-13 19:38 ` Mike Habeck
2010-05-13 20:02 ` Bjorn Helgaas
2010-05-13 20:09 ` H. Peter Anvin
2010-05-14 22:25 ` Jesse Barnes
2010-05-14 22:34 ` Mike Travis
2010-05-14 22:35 ` H. Peter Anvin
2010-05-14 22:40 ` Mike Travis
2010-05-15 2:25 ` Mike Travis
2010-05-14 22:47 ` Jesse Barnes
2010-05-14 22:59 ` Mike Travis
2010-05-14 23:06 ` Jesse Barnes
2010-05-14 23:23 ` Mike Travis
2010-05-14 23:33 ` Jesse Barnes
2010-05-14 23:40 ` H. Peter Anvin [this message]
2010-05-15 0:02 ` Jesse Barnes
2010-05-14 23:20 ` H. Peter Anvin
2010-05-14 23:28 ` Jesse Barnes
2010-05-14 23:32 ` H. Peter Anvin
2010-05-14 23:34 ` Jesse Barnes
2010-05-14 23:39 ` H. Peter Anvin
2010-05-15 0:00 ` Jesse Barnes
2010-05-15 0:14 ` H. Peter Anvin
2010-05-13 20:36 ` Yinghai Lu
2010-05-13 20:34 ` H. Peter Anvin
2010-05-13 18:58 ` Bjorn Helgaas
2010-05-28 16:53 ` Mike Travis
2010-05-28 17:00 ` H. Peter Anvin
2010-05-28 17:10 ` Mike Travis
2010-05-28 19:28 ` Jesse Barnes
2010-05-28 20:04 ` H. Peter Anvin
2010-05-31 11:12 ` Mike Travis
2010-05-31 16:36 ` H. Peter Anvin
2010-06-01 22:49 ` Bjorn Helgaas
2010-06-02 7:31 ` H. Peter Anvin
2010-06-02 15:45 ` Bjorn Helgaas
2010-06-02 15:47 ` H. Peter Anvin
2010-06-02 15:53 ` Jesse Barnes
2010-06-09 0:53 ` H. Peter Anvin
2010-06-09 1:26 ` Jesse Barnes
2010-06-09 14:23 ` Mike Habeck
2010-06-02 15:53 ` Mike Habeck
2010-06-02 16:40 ` Bjorn Helgaas
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