Dave Chinner cffbc8aa33
fs: Convert nr_inodes and nr_unused to per-cpu counters ...
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: Dave Chinner <dchinner@redhat.com >
Reviewed-by: Christoph Hellwig <hch@lst.de >
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk >
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cffbc8aa33