vfs: revert per-cpu nr_unused counters for dentry and inodes

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The nr_unused counters count the number of objects on an LRU, and as such they
are synchronized with LRU object insertion and removal and scanning, and
protected under the LRU lock.

Making it per-cpu does not actually get any concurrency improvements because of
this lock, and summing the counter is much slower, and
incrementing/decrementing it costs more code size and is slower too.

These counters should stay per-LRU, which currently means global.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>

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This commit is contained in:

Nick Piggin 2011-01-07 17:49:18 +11:00

parent ccd35fb9f4

commit 86c8749ede

2 changed files with 12 additions and 21 deletions

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16

fs/dcache.c

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17

fs/inode.c

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