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    fs: Convert nr_inodes and nr_unused to per-cpu counters · cffbc8aa
    Dave Chinner 提交于
    The number of inodes allocated does not need to be tied to the
    addition or removal of an inode to/from a list. If we are not tied
    to a list lock, we could update the counters when inodes are
    initialised or destroyed, but to do that we need to convert the
    counters to be per-cpu (i.e. independent of a lock). This means that
    we have the freedom to change the list/locking implementation
    without needing to care about the counters.
    
    Based on a patch originally from Eric Dumazet.
    
    [AV: cleaned up a bit, fixed build breakage on weird configs
    Signed-off-by: NDave Chinner <dchinner@redhat.com>
    Reviewed-by: NChristoph Hellwig <hch@lst.de>
    Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
    cffbc8aa
inode.c 41.2 KB