lkml.org 
[lkml]   [2022]   [Nov]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 03/20] block, bfq: correct bfq_max_budget and bfq_min_budget
Date
The budgets_assigned is checked to make sure enough samples have been
computed for auto-tuning. Ignore budgets_assigned if auto-tuning is
disabled as bfq_default_max_budget is set by user.
The bfq_default_max_budget check is added after budgets_assigned check,
so no extra cost is added for normal branch to return bfqd->bfq_max_budget.

Signed-off-by: Kemeng Shi <shikemeng@huawei.com>
---
block/bfq-iosched.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index 13370c41ad36..b21c3711d69d 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -1485,7 +1485,8 @@ static int bfq_bfqq_budget_left(struct bfq_queue *bfqq)
*/
static int bfq_max_budget(struct bfq_data *bfqd)
{
- if (bfqd->budgets_assigned < bfq_stats_min_budgets)
+ if (bfqd->budgets_assigned < bfq_stats_min_budgets &&
+ bfqd->bfq_user_max_budget == 0)
return bfq_default_max_budget;
else
return bfqd->bfq_max_budget;
@@ -1497,7 +1498,8 @@ static int bfq_max_budget(struct bfq_data *bfqd)
*/
static int bfq_min_budget(struct bfq_data *bfqd)
{
- if (bfqd->budgets_assigned < bfq_stats_min_budgets)
+ if (bfqd->budgets_assigned < bfq_stats_min_budgets &&
+ bfqd->bfq_user_max_budget == 0)
return bfq_default_max_budget / 32;
else
return bfqd->bfq_max_budget / 32;
--
2.30.0
\
 
 \ /
  Last update: 2022-11-01 10:34    [W:1.577 / U:0.352 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site