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| author | Baolin Wang <baolin.wang@linux.alibaba.com> | 2020-09-07 16:10:17 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-09-14 19:36:54 -0600 |
| commit | 87fbeb8813bd8d48cb4b5c884793cc6b5126f6b8 (patch) | |
| tree | dc09d7b840985a3490853ff2cb91eb7ac1fbe3f4 /block/blk-throttle.c | |
| parent | 4599ea49d4b00a6fbaab2977e7f8359cfc7e8916 (diff) | |
| download | lwn-87fbeb8813bd8d48cb4b5c884793cc6b5126f6b8.tar.gz lwn-87fbeb8813bd8d48cb4b5c884793cc6b5126f6b8.zip | |
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/blk-throttle.c')
| -rw-r--r-- | block/blk-throttle.c | 12 |
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 */ |