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    SubjectRe: [PATCH] [BUGFIX] rmap: remove anon_vma check in page_address_in_vma()
    On 04/22/2010 10:08 PM, Naoya Horiguchi wrote:
    > Currently page_address_in_vma() compares vma->anon_vma and page_anon_vma(page)
    > for parameter check, but in 2.6.34 a vma can have multiple anon_vmas with
    > anon_vma_chain, so current check does not work. (For anonymous page shared by
    > multiple processes, some verified (page,vma) pairs return -EFAULT wrongly.)
    > We can go to checking all anon_vmas in the "same_vma" chain, but it needs
    > to meet lock requirement. Instead, we can remove anon_vma check safely
    > because page_address_in_vma() assumes that page and vma are already checked
    > to belong to the identical process.
    > Signed-off-by: Naoya Horiguchi<>
    > Cc: Andrew Morton<>
    > Cc: Rik van Riel<>
    > Cc: Andi Kleen<>

    Reviewed-by: Rik van Riel <>

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      Last update: 2010-04-23 15:55    [W:0.019 / U:7.576 seconds]
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