From: "Chen, Kenneth W" <kenneth.w.chen@intel.com>
To: linux-ia64@vger.kernel.org
Subject: RE: [RFC] Variable Kernel Page size support
Date: Fri, 13 Oct 2006 00:55:48 +0000 [thread overview]
Message-ID: <000601c6ee62$52b70690$db34030a@amr.corp.intel.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0610121730050.22778@schroedinger.engr.sgi.com>
Chen, Kenneth wrote on Thursday, October 12, 2006 5:51 PM
> > If set then a lookup is performed using the region7_pgdir table.
> > That table is segmented into 8 section for the varying page
> > sizes supported.
>
> What is the reason to anchor these 8 sections with pgdir? Can't we just
> extract page size directly from the virtual address? Chop off bit 54 - 60,
> that's the physical address, whola. I don't see why it can't be done.
For a very large contiguous virtual address space, I guess there is no way
to get around page table indirection. Oh well. Never mind.
- Ken
next prev parent reply other threads:[~2006-10-13 0:55 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-13 0:32 [RFC] Variable Kernel Page size support Christoph Lameter
2006-10-13 0:50 ` Chen, Kenneth W
2006-10-13 0:55 ` Chen, Kenneth W [this message]
2006-10-13 1:12 ` Christoph Lameter
2006-10-13 1:28 ` Chen, Kenneth W
2006-10-13 1:38 ` Christoph Lameter
2006-10-13 9:21 ` Robin Holt
2006-10-13 18:03 ` Christoph Lameter
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