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    SubjectRe: [PATCH V3 0/8] Cleancache: overview
    On Fri, Jul 23, 2010 at 4:36 PM, Nitin Gupta <> wrote:
    > 2. I think change in btrfs can be avoided by moving cleancache_get_page()
    > from do_mpage_reapage() to filemap_fault() and this should work for all
    > filesystems. See:
    > handle_pte_fault() -> do_(non)linear_fault() -> __do_fault()
    >                                                -> vma->vm_ops->fault()
    > which is defined as filemap_fault() for all filesystems. If some future
    > filesystem uses its own custom function (why?) then it will have to arrange for
    > call to cleancache_get_page(), if it wants this feature.

    filemap fault works only in case of file-backed page which is mapped
    but don't work not-mapped cache page. So we could miss cache page by
    read system call if we move it into filemap_fault.

    Kind regards,
    Minchan Kim
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      Last update: 2010-07-23 10:21    [W:0.025 / U:13.912 seconds]
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