From: "Lu, Yinghai" <yinghai.lu@amd.com>
To: "Andrew Morton" <akpm@osdl.org>
Cc: "Greg KH" <greg@kroah.com>, "Greg KH" <gregkh@suse.de>,
"Andi Kleen" <ak@suse.de>,
linux-kernel@vger.kernel.org, myles@mouselemur.cs.byu.edu
Subject: RE: PCI: check szhi when sz is 0 when 64 bit iomem bigger than 4G
Date: Wed, 29 Nov 2006 14:08:50 -0800 [thread overview]
Message-ID: <5986589C150B2F49A46483AC44C7BCA4907254@ssvlexmb2.amd.com> (raw)
-----Original Message-----
From: Andrew Morton [mailto:akpm@osdl.org]
Sent: Wednesday, November 29, 2006 1:53 PM
>It has no changelog. We're still waiting for a complete description of
the
>patch: why it is needed, what it does, how it does it. Please provide
>that.
-----------------
For pci mem resource that size is bigger than 4G, the sz returned by
pc_size will be 0.
So that resource is skipped, and register contained hi address will be
treated as another 32bit
resource. We need to use sz64 and pci_sz64 for 64 bit resource for clear
logical.
Typical usages for this: Opteron system with co-processor and the
co-processor could take
more than 4G RAM as pre-fetchable mem resource.
-----------------
YH
next reply other threads:[~2006-11-29 22:12 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-29 22:08 Lu, Yinghai [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-11-29 21:33 Lu, Yinghai
2006-11-29 21:53 ` Andrew Morton
[not found] <5986589C150B2F49A46483AC44C7BCA4130683@ssvlexmb2.amd.com>
2006-11-23 8:39 ` Greg KH
2006-11-24 18:46 ` Yinghai Lu
2006-11-24 21:44 ` Andrew Morton
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