Messages in this thread | | | Date | Mon, 10 Apr 2006 15:27:48 -0500 | From | Dave McCracken <> | Subject | Re: [RFC/PATCH] Shared Page Tables [0/2] |
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--On Monday, April 10, 2006 13:20:59 -0700 Christoph Lameter <clameter@sgi.com> 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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