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bfq: fix typos in comments about B-WF2Q+ algorithm 

The start time of eligible entity should be less than or equal to
the current virtual time, and the entity in idle tree has a finish
time being greater than the current virtual time.

Signed-off-by: Hou Tao <houtao1@huawei.com>
Reviewed-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Hou Tao 2017-07-12 15:25:01 +08:00 committed by Jens Axboe
parent 3b06b1a744
commit 38c9140740
2 changed files with 2 additions and 2 deletions
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2
block/bfq-iosched.h
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@ -52,7 +52,7 @@ struct bfq_entity;
struct bfq_service_tree {
/* tree for active entities (i.e., those backlogged) */
struct rb_root active;
/* tree for idle entities (i.e., not backlogged, with V <= F_i)*/
/* tree for idle entities (i.e., not backlogged, with V < F_i)*/
struct rb_root idle;
/* idle entity with minimum F_i */

2
block/bfq-wf2q.c
View File

@ -1297,7 +1297,7 @@ static void bfq_update_vtime(struct bfq_service_tree *st, u64 new_value)
*
* This function searches the first schedulable entity, starting from the
* root of the tree and going on the left every time on this side there is
* a subtree with at least one eligible (start >= vtime) entity. The path on
* a subtree with at least one eligible (start <= vtime) entity. The path on
* the right is followed only if a) the left subtree contains no eligible
* entities and b) no eligible entity has been found yet.
*/