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| author |   Liu Bo <bo.liu@linux.alibaba.com> | 2018-08-23 03:51:53 +0800 |
|---|---|---|
| committer |   David Sterba <dsterba@suse.com> | 2018-10-15 17:23:33 +0200 |
| commit | ecf160b424ee648a14116079ff72d7d1241e377d (patch) | |
| tree | 61a3502ed04992731866a450d4a03948b9aff80f /tools/perf/scripts/python/intel-pt-events.py | |
| parent | Btrfs: extent_map: use rb_first_cached (diff) | |
| download | wireguard-linux-ecf160b424ee648a14116079ff72d7d1241e377d.tar.xz wireguard-linux-ecf160b424ee648a14116079ff72d7d1241e377d.zip | |
Btrfs: preftree: use rb_first_cached
rb_first_cached() trades an extra pointer "leftmost" for doing the same
job as rb_first() but in O(1).
While resolving indirect refs and missing refs, it always looks for the
first rb entry in a while loop, it's helpful to use rb_first_cached
instead.
For more details about the optimization see patch "Btrfs: delayed-refs:
use rb_first_cached for href_root".
Tested-by: Holger Hoffstätte <holger@applied-asynchrony.com>
Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'tools/perf/scripts/python/intel-pt-events.py')
0 files changed, 0 insertions, 0 deletions