Re: [RFD] Separating struct task and the kernel stacks

From: David Mosberger <davidm_at_napali.hpl.hp.com>
Date: 2005-06-11 02:54:27
>>>>> On Fri, 10 Jun 2005 16:15:11 +1000, Keith Owens <kaos@sgi.com> said:

  Keith> Since the slab allocator uses addresses in region 7, we do
  Keith> not need any extra hard wired TLBs for the separate struct
  Keith> task.  The alt-DTLB handler will load the TLB on the fly, it
  Keith> does not need any stack data to do that.

Interruption handlers access the task structure, register-backing
store, and memory stack via the virtual address-space.  Since
interruption-collection is turned off in those handlers, the alt-DTLB
handler doesn't do you any good.

Being able to map these structures with a single translation-register
is the primary reason for keeping the task structure and the stacks
together on ia64.

	--david
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Received on Fri Jun 10 12:55:27 2005

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