diff options
| author |   Jan Kara <jack@suse.cz> | 2021-11-25 14:36:36 +0100 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2021-11-29 06:38:51 -0700 |
| commit | 44dfa279f117646163db0c8760addb45dd6a0e8c (patch) | |
| tree | 3496a0836124e90628538818ae315efce4025bac /block/bfq-iosched.c | |
| parent | bfq: Track number of allocated requests in bfq_entity (diff) | |
| download | linux-dev-44dfa279f117646163db0c8760addb45dd6a0e8c.tar.xz linux-dev-44dfa279f117646163db0c8760addb45dd6a0e8c.zip | |
bfq: Store full bitmap depth in bfq_data
Store bitmap depth shift inside bfq_data so that we can use it in
bfq_limit_depth() for proportioning when limiting number of available
request tags for a cgroup.
Acked-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20211125133645.27483-3-jack@suse.cz
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bfq-iosched.c')
| -rw-r--r-- | block/bfq-iosched.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c index 1d564499614e..cf9247301e3c 100644 --- a/block/bfq-iosched.c +++ b/block/bfq-iosched.c @@ -6857,7 +6857,9 @@ static unsigned int bfq_update_depths(struct bfq_data *bfqd, struct sbitmap_queue *bt) { unsigned int i, j, min_shallow = UINT_MAX; + unsigned int depth = 1U << bt->sb.shift; + bfqd->full_depth_shift = bt->sb.shift; /* * In-word depths if no bfq_queue is being weight-raised: * leaving 25% of tags only for sync reads. @@ -6869,13 +6871,13 @@ static unsigned int bfq_update_depths(struct bfq_data *bfqd, * limit 'something'. */ /* no more than 50% of tags for async I/O */ - bfqd->word_depths[0][0] = max((1U << bt->sb.shift) >> 1, 1U); + bfqd->word_depths[0][0] = max(depth >> 1, 1U); /* * no more than 75% of tags for sync writes (25% extra tags * w.r.t. async I/O, to prevent async I/O from starving sync * writes) */ - bfqd->word_depths[0][1] = max(((1U << bt->sb.shift) * 3) >> 2, 1U); + bfqd->word_depths[0][1] = max((depth * 3) >> 2, 1U); /* * In-word depths in case some bfq_queue is being weight- @@ -6885,9 +6887,9 @@ static unsigned int bfq_update_depths(struct bfq_data *bfqd, * shortage. */ /* no more than ~18% of tags for async I/O */ - bfqd->word_depths[1][0] = max(((1U << bt->sb.shift) * 3) >> 4, 1U); + bfqd->word_depths[1][0] = max((depth * 3) >> 4, 1U); /* no more than ~37% of tags for sync writes (~20% extra tags) */ - bfqd->word_depths[1][1] = max(((1U << bt->sb.shift) * 6) >> 4, 1U); + bfqd->word_depths[1][1] = max((depth * 6) >> 4, 1U); for (i = 0; i < 2; i++) for (j = 0; j < 2; j++) |