• Mark Fasheh's avatar
    ocfs2: Add dentry tracking API · 80c05846
    Mark Fasheh authored
    Replace the dentry vote mechanism with a cluster lock which covers a set
    of dentries. This allows us to force d_delete() only on nodes which actually
    care about an unlink.
    Every node that does a ->lookup() gets a read only lock on the dentry, until
    an unlink during which the unlinking node, will request an exclusive lock,
    forcing the other nodes who care about that dentry to d_delete() it. The
    effect is that we retain a very lightweight ->d_revalidate(), and at the
    same time get to make large improvements to the average case performance of
    the ocfs2 unlink and rename operations.
    This patch adds the higher level API and the dentry manipulation code.
    Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
dcache.c 11.6 KB