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| author |   NeilBrown <neilb@suse.de> | 2012-05-22 13:55:22 +1000 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2012-05-22 13:55:22 +1000 |
| commit | bdfd1140731a67c74fd74814f222c8078171adcd (patch) | |
| tree | e244aa26d983b56c61fb8d53eb9a1a4105476a85 /tools/perf/scripts/python/syscall-counts.py | |
| parent | md/bitmap: merge bitmap_file_unmap and bitmap_file_put. (diff) | |
| download | linux-dev-bdfd1140731a67c74fd74814f222c8078171adcd.tar.xz linux-dev-bdfd1140731a67c74fd74814f222c8078171adcd.zip | |
md/bitmap: make _page_attr bitops atomic.
Using e.g. set_bit instead of __set_bit and using test_and_clear_bit
allow us to remove some locking and contract other locked ranges.
It is rare that we set or clear a lot of these bits, so gain should
outweigh any cost.
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions