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| author | Davidlohr Bueso <dave@stgolabs.net> | 2017-09-08 16:15:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-08 18:26:49 -0700 |
| commit | b2ac2ea6296e7dd779168eb085b09d0fab9d1294 (patch) | |
| tree | 8fefe90ed4da5ac94000fd160d42c5c39a225670 /block/cfq-iosched.c | |
| parent | 410bd5ecb276593e7ec1552014083215d4a43c3a (diff) | |
| download | linux-0-day-b2ac2ea6296e7dd779168eb085b09d0fab9d1294.tar.gz linux-0-day-b2ac2ea6296e7dd779168eb085b09d0fab9d1294.tar.xz | |
fs/epoll: use faster rb_first_cached()
... such that we can avoid the tree walks to get the node with the
smallest key. Semantically the same, as the previously used rb_first(),
but O(1). The main overhead is the extra footprint for the cached rb_node
pointer, which should not matter for epoll.
Link: http://lkml.kernel.org/r/20170719014603.19029-15-dave@stgolabs.net
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'block/cfq-iosched.c')
0 files changed, 0 insertions, 0 deletions