From: David Mosberger <davidm@napali.hpl.hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [RFD] Separating struct task and the kernel stacks
Date: Fri, 10 Jun 2005 16:54:27 +0000 [thread overview]
Message-ID: <17065.50627.973606.726605@napali.hpl.hp.com> (raw)
In-Reply-To: <9712.1118384111@kao2.melbourne.sgi.com>
>>>>> 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
next prev parent reply other threads:[~2005-06-10 16:54 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-10 6:15 [RFD] Separating struct task and the kernel stacks Keith Owens
2005-06-10 15:11 ` Christoph Lameter
2005-06-10 16:54 ` David Mosberger [this message]
2005-06-10 17:03 ` David Mosberger
2005-06-10 17:13 ` Matthew Wilcox
2005-06-10 17:20 ` David Mosberger
2005-06-11 4:08 ` Keith Owens
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