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blk-iocost: Remove vrate member in struct ioc_now

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If we trace vtime_base_rate instead of vtime_rate, there is nowhere
which accesses now->vrate except function ioc_now using now->vrate locally.
Just remove it.

Signed-off-by: Kemeng Shi <shikemeng@huawei.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20221018121932.10792-5-shikemeng@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Kemeng Shi 2022-10-18 20:19:31 +08:00 committed by Jens Axboe
parent 63c9eac4b6
commit 6c31be320c
1 changed files with 3 additions and 3 deletions
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6
block/blk-iocost.c
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@ -556,7 +556,6 @@ struct ioc_now {
u64 now_ns;
u64 now;
u64 vnow;
u64 vrate;
};
struct iocg_wait {
@ -1020,10 +1019,11 @@ static void ioc_adjust_base_vrate(struct ioc *ioc, u32 rq_wait_pct,
static void ioc_now(struct ioc *ioc, struct ioc_now *now)
{
unsigned seq;
u64 vrate;
now->now_ns = ktime_get();
now->now = ktime_to_us(now->now_ns);
now->vrate = atomic64_read(&ioc->vtime_rate);
vrate = atomic64_read(&ioc->vtime_rate);
/*
* The current vtime is
@ -1036,7 +1036,7 @@ static void ioc_now(struct ioc *ioc, struct ioc_now *now)
do {
seq = read_seqcount_begin(&ioc->period_seqcount);
now->vnow = ioc->period_at_vtime +
(now->now - ioc->period_at) * now->vrate;
(now->now - ioc->period_at) * vrate;
} while (read_seqcount_retry(&ioc->period_seqcount, seq));
}