[IA64] Large vmemmap support
This implements granule page sized vmemmap support for IA64. This is
important because the traditional vmemmap on IA64 uses page size for
mapping the TLB. For a typical 8GB node on IA64 we need about
(33 - 14 + 6 = 25) = 32 MB of page structs.
Using page size we will
> This implements granule page sized vmemmap support for IA64.
Christoph,
Your calculations here are all based on a granule size of 16M, but
it is possible to configure 64M granules.
With current sizeof(struct page) == 56, a 16M page will hold enough
page structures for about 4.5G of physical sp
From: "Luck, Tony" <[EMAIL PROTECTED]>
Date: Thu, 5 Apr 2007 15:50:02 -0700
> Maybe a granule is not the right unit of allocation ... perhaps 4M
> would work better (4M/56 ~= 75000 pages ~= 1.1G)? But if this is
> too small, then a hard-coded 16M would be better than a granule,
> because 64M is (
On Thu, 5 Apr 2007, Luck, Tony wrote:
> > This implements granule page sized vmemmap support for IA64.
>
> Christoph,
>
> Your calculations here are all based on a granule size of 16M, but
> it is possible to configure 64M granules.
Hmm.. Maybe we need to have a separate size for the vmemma
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