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Subject[PATCH 5/5] blk-throttle: Avoid checking bps/iops limitation if bps or iops is unlimited
Date
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>
---
block/blk-throttle.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 8719e37..36ba61c 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 */
--
1.8.3.1
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