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    SubjectRe: [PATCH 23/43] CacheFiles: Permit the page lock state to be monitored [ver #46]
    David Howells wrote:
    > Add a function to install a monitor on the page lock waitqueue for a particular
    > page, thus allowing the page being unlocked to be detected.
    >
    > This is used by CacheFiles to detect read completion on a page in the backing
    > filesystem so that it can then copy the data to the waiting netfs page.
    >
    > Signed-off-by: David Howells <dhowells@redhat.com>
    > Acked-by: Steve Dickson <steved@redhat.com>
    > Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com>
    Acked-by: Rik van Riel <riel@redhat.com>


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