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    SubjectRe: [PATCH 2.5.66-mm2] Fix page_convert_anon locking issues
    Dave McCracken <dmccr@us.ibm.com> wrote:
    >
    >
    > Oops. The pmd_present() check should be after the page_to_pfn() !=
    > pte_pfn() check.
    >

    hmmmm. It also probably needs both compiler barriers and memory barriers.

    It does give me creepy feelings. I worry that because nobody uses
    remap_file_pages() yet, we will hit 2.6.25 before discovering that we have
    fundamental VM locking problems which affect $major$ applications.


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