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| author |   Christoph Hellwig <hch@infradead.org> | 2010-10-10 05:36:23 -0400 |
|---|---|---|
| committer |   Al Viro <viro@zeniv.linux.org.uk> | 2010-10-25 21:26:12 -0400 |
| commit | 312d3ca856d369bb04d0443846b85b4cdde6fa8a (patch) | |
| tree | cf95d01cffaf02bf53c2bb0f7c2c924279ec6eeb /tools/perf/scripts/python/bin/syscall-counts-report | |
| parent | fs: simplify __d_free (diff) | |
fs: use percpu counter for nr_dentry and nr_dentry_unused
The nr_dentry stat is a globally touched cacheline and atomic operation
twice over the lifetime of a dentry. It is used for the benfit of userspace
only. Turn it into a per-cpu counter and always decrement it in d_free instead
of doing various batching operations to reduce lock hold times in the callers.
Based on an earlier patch from Nick Piggin <npiggin@suse.de>.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'tools/perf/scripts/python/bin/syscall-counts-report')
0 files changed, 0 insertions, 0 deletions