Re: [RFC/PATCH] Shared Page Tables [0/2]

[Dave McCracken]

--On Monday, April 10, 2006 13:20:59 -0700 Christoph Lameter
<clameter@xxxxxxx> wrote:

>> The lock changes to hugetlb are only to support sharing of pmd pages when
>> they contain hugetlb pages.  They just substitute the struct page lock
>> for the page_table_lock, and are only about 30 lines of code.  Is this
>> really worth separating out?
> 
> Ia64 does not use pmd pages for huge pages. It relies instead on a 
> separate region. I wonder if this works on IA64.

Sharing of hugetlb page tables is enabled on a per-architecture basis, so
if ia64 doesn't use pmd pages we shouldn't try to enable it.  If it's not
enabled all the locking in hugetlb resolves to using page_table_lock, so
the original semantics will be preserved.

Dave McCracken

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