tg_bps_limit

Name:tg_bps_limit

Proto:static uint64_t tg_bps_limit(struct throtl_grp *tg, int rw)

Type:uint64_t

Parameter:

Type	Parameter	Name
struct throtl_grp *	tg
int	rw

298

blkg = tg_to_blkg(tg)

302

If cgroup_subsys_on_dfl - fast test on whether a subsys is on default hierarchy*@ss: subsystem in question(io_cgrp_subsys) && Not all non-root blkcg_gq's are guaranteed to have access to parent Then Return U64_MAX

305

td = throtl_data this group belongs to

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ret = internally used bytes per second rate limits [rw][limit_index]

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If ret == 0 && limit_index == LIMIT_LOW Then

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If Not list_empty - tests whether a list is empty*@head: the list to test. || internally used IOPS limits [rw][limit_index] Then Return U64_MAX

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Else Return MIN_THROTL_BPS

316

If limit_index == LIMIT_MAX && internally used bytes per second rate limits [rw][LIMIT_LOW] && internally used bytes per second rate limits [rw][LIMIT_LOW] != internally used bytes per second rate limits [rw][LIMIT_MAX] Then

320

adjusted = group's limit in LIMIT_MAX is scaled if low limit is set. This scale is to* make the IO dispatch more smooth.* Scale up: linearly scale up according to lapsed time since upgrade. For* every throtl_slice, the limit scales up 1/2 .low limit till the

321

ret = min - return minimum of two values of the same or compatible types*@x: first value*@y: second value( internally used bytes per second rate limits [rw][LIMIT_MAX], adjusted)

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Return ret

**Caller**
Name	Describe
tg_update_has_rules	Set has_rules[] if @tg or any of its parents have limits configured.* This doesn't require walking up to the top of the hierarchy as the* parent's has_rules[] is guaranteed to be correct.
throtl_trim_slice	Trim the used slices and adjust slice start accordingly
tg_with_in_bps_limit
tg_may_dispatch	Returns whether one can dispatch a bio or not. Also returns approx number* of jiffies to wait before this bio is with-in IO rate and can be dispatched
tg_conf_updated
blk_throtl_bio

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