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    SubjectRe: Locking comment on shrink_caches()
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       From: Andrea Arcangeli <andrea@suse.de>
    Date: Wed, 26 Sep 2001 00:01:02 +0200

    IMHO if we would hold the pagecache lock all the time while shrinking
    the cache, then we could kill the lru lock in first place.

    And actually in the pagecache locking patches, doing such a thing
    would be impossible :-) since each page needs to grab a different
    lock (because the hash chain is potentially different).

    Franks a lot,
    David S. Miller
    davem@redhat.com
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