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    SubjectRe: PG_clean for shared mapping smart syncing

    On Sat, 19 Dec 1998 17:37:03 +0100 (CET), Andrea Arcangeli
    <> said:

    > Ah but I just found a problem... When we set the PG_clean flag on the page
    > we should set the pte readonly for that page in all process vm and not
    > only in the process running. But if we must play with the page table it's
    > easier to directly set the page as clean as I was used to do with my
    > previous update_shared_mappings() patch. So I think we could drop
    > completly my last patch and return to my old code and solve the problem to
    > handle the mmap_sem locking right...

    Agreed, I much prefer the concept of being able to reliably keep the pte
    dirty bits consistent between processes.


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