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authorBaolin Wang <baolin.wang@linux.alibaba.com>2020-09-07 16:10:17 +0800
committerJens Axboe <axboe@kernel.dk>2020-09-14 19:36:54 -0600
commit87fbeb8813bd8d48cb4b5c884793cc6b5126f6b8 (patch)
treedc09d7b840985a3490853ff2cb91eb7ac1fbe3f4 /block
parent4599ea49d4b00a6fbaab2977e7f8359cfc7e8916 (diff)
downloadlinux-87fbeb8813bd8d48cb4b5c884793cc6b5126f6b8.tar.bz2
blk-throttle: Avoid checking bps/iops limitation if bps or iops is unlimited
Do not need check the bps or iops limitation if bps or iops is unlimited. Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk-throttle.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 8719e37c3564..36ba61c5cdbd 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -901,6 +901,12 @@ static bool tg_with_in_iops_limit(struct throtl_grp *tg, struct bio *bio,
unsigned long jiffy_elapsed, jiffy_wait, jiffy_elapsed_rnd;
u64 tmp;
+ if (iops_limit == UINT_MAX) {
+ if (wait)
+ *wait = 0;
+ return true;
+ }
+
jiffy_elapsed = jiffies - tg->slice_start[rw];
/* Round up to the next throttle slice, wait time must be nonzero */
@@ -943,6 +949,12 @@ static bool tg_with_in_bps_limit(struct throtl_grp *tg, struct bio *bio,
unsigned long jiffy_elapsed, jiffy_wait, jiffy_elapsed_rnd;
unsigned int bio_size = throtl_bio_data_size(bio);
+ if (bps_limit == U64_MAX) {
+ if (wait)
+ *wait = 0;
+ return true;
+ }
+
jiffy_elapsed = jiffy_elapsed_rnd = jiffies - tg->slice_start[rw];
/* Slice has just started. Consider one slice interval */