RE: [PATCH] ia64, kexec: allow base of crashkernel to be auto-discovered

From: Luck, Tony <tony.luck_at_intel.com>
Date: 2006-07-06 05:16:41
> I might be confused, but I'm not exactly sure that my patch would run
> into this problem. It only tries to insert the "Crash kernel" resource
> as a sub-resource of an existing "System RAM" resource, and does so in
> such a way that it should not overlap with any existing sub-resources.
> Surely VGA and the like are in completely different resources not
> covered by a "System RAM" resource.

The problem is that _nearby_ resources may require different attributes,
yet be mapped by a single TR entry.  E.g. on an Intel Tiger there is a
"System RAM" resource from 0x100000-0x3ffffff, but if you place the kernel
image into it, then ITR[0] and DTR[0] will map the entire 64M from
0x0 to 0x3ffffff, which includes the VGA.

-Tony
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Received on Thu Jul 06 05:17:19 2006

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