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    SubjectRe: [PATCH 2/7] FS-Cache: Add notification of page becoming writable to VMA ops
    David Howells wrote:
    > The attached patch adds a new VMA operation to notify a filesystem or other
    > driver about the MMU generating a fault because userspace attempted to write
    > to a page mapped through a read-only PTE.

    This will almost certainly help OCFS2 get shared writable mmap() right,
    too, though it probably won't be the whole story.

    - z
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