Commit ce95570a authored by Tejun Heo's avatar Tejun Heo Committed by Jens Axboe
Browse files

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



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: default avatarTejun Heo <tj@kernel.org>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent bd0adb91

block/blk-iocost.c

+2 −2
Original line number Diff line number Diff line
@@ -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;

};