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blk-iocost: make ioc_now->now and ioc->period_at 64bit

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They are in microseconds and wrap in around 1.2 hours with u32. While
unlikely, confusions from wraparounds are still possible. We aren't saving
anything meaningful by keeping these u32. Let's make them u64.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Tejun Heo 2020-09-01 14:52:40 -04:00 committed by Jens Axboe
parent bd0adb91a6
commit ce95570acf
1 changed files with 2 additions and 2 deletions
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block/blk-iocost.c
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@ -409,7 +409,7 @@ struct ioc {
atomic64_t vtime_rate;
seqcount_spinlock_t period_seqcount;
u32 period_at; /* wallclock starttime */
u64 period_at; /* wallclock starttime */
u64 period_at_vtime; /* vtime starttime */
atomic64_t cur_period; /* inc'd each period */
@ -508,7 +508,7 @@ struct ioc_cgrp {
struct ioc_now {
u64 now_ns;
u32 now;
u64 now;
u64 vnow;
u64 vrate;
};