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    SubjectRE: [PATCH/RFC] Shared page tables
    Date
    Robin Holt wrote on Tuesday, January 17, 2006 3:53 PM
    > This appears to work on ia64 with the attached patch. Could you
    > send me any test application you think would be helpful for me
    > to verify it is operating correctly? I could not get the PTSHARE_PUD
    > to compile. I put _NO_ effort into it. I found the following line
    > was invalid and quit trying.
    >
    > --- linux-2.6.orig/arch/ia64/Kconfig 2006-01-14 07:16:46.149226872 -0600
    > +++ linux-2.6/arch/ia64/Kconfig 2006-01-14 07:25:02.228853432 -0600
    > @@ -289,6 +289,38 @@ source "mm/Kconfig"
    > config ARCH_SELECT_MEMORY_MODEL
    > def_bool y
    >
    > +
    > +config PTSHARE_HUGEPAGE
    > + bool
    > + depends on PTSHARE && PTSHARE_PMD
    > + default y
    > +

    You need to thread carefully with hugetlb ptshare on ia64. PTE for
    hugetlb page on ia64 observe full page table levels, not like x86
    that sits in the pmd level.

    - Ken

    -
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