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    SubjectRe: [PATCH 2/7] mmc: Don't use PF_MEMALLOC
    On Tue, 17 Nov 2009 16:17:50 +0900 (JST)
    KOSAKI Motohiro <> wrote:

    > Non MM subsystem must not use PF_MEMALLOC. Memory reclaim need few
    > memory, anyone must not prevent it. Otherwise the system cause
    > mysterious hang-up and/or OOM Killer invokation.

    So now what happens if we are paging and all our memory is tied up for
    writeback to a device or CIFS etc which can no longer allocate the memory
    to complete the write out so the MM can reclaim ?

    Am I missing something or is this patch set not addressing the case where
    the writeback thread needs to inherit PF_MEMALLOC somehow (at least for
    the I/O in question and those blocking it)


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