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| author | Jens Axboe <jens.axboe@oracle.com> | 2007-04-26 12:53:50 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@nelson.home.kernel.dk> | 2007-04-30 09:01:21 +0200 |
| commit | cc09e2990fdd96d25fdbb9db6bc9b4c82d9e4a3c (patch) | |
| tree | 89c538c6182335592a981ded03fc120b616aef47 /block/deadline-iosched.c | |
| parent | d9e7620e60bc6648c3dcabbc8d1a320b69c846f9 (diff) | |
[PATCH] cfq-iosched: speed up rbtree handling
For cases where the rbtree is mainly used for sorting and min retrieval,
a nice speedup of the rbtree code is to maintain a cache of the leftmost
node in the tree.
Also spotted in the CFS CPU scheduler code.
Improved by Alan D. Brunelle <Alan.Brunelle@hp.com> by updating the
leftmost hint in cfq_rb_first() if it isn't set, instead of only
updating it on insert.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/deadline-iosched.c')
0 files changed, 0 insertions, 0 deletions