throtl_upgrade_state

Name:throtl_upgrade_state

Proto:static void throtl_upgrade_state(struct throtl_data *td)

Type:void

Parameter:

Type	Parameter	Name
struct throtl_data *	td

1941

hrotl_log - log debug message via blktrace*@sq: the service_queue being reported*@fmt: printf format string*@args: printf args* The messages are prefixed with "throtl BLKG_NAME" if @sq belongs to a* throtl_grp; otherwise, just "throtl".( & service tree for active throtl groups , "upgrade to max")

1942

limit_index = LIMIT_MAX

1943

low_upgrade_time = jiffies

1944

scale = 0

1945

_read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other

1946

lkg_for_each_descendant_post - post-order walk of a blkg's descendants*@d_blkg: loop cursor pointing to the current descendant*@pos_css: used for iteration*@p_blkg: target blkg to walk descendants of* Similar to blkg_for_each_descendant_pre() but performs (blkg, pos_css, root_blkg)

1947

tg = blkg_to_tg(blkg)

1948

sq = this group's service queue

1950

* Dispatch time in jiffies. This is the estimated time when group * will unthrottle and is ready to dispatch more bio. It is used as * key to sort active groups in service tree. = jiffies - 1

1951

throtl_select_dispatch(sq)

1952

hrotl_schedule_next_dispatch - schedule the next dispatch cycle*@sq: the service_queue to schedule dispatch for*@force: force scheduling* Arm @sq->pending_timer so that the next dispatch cycle starts on the* dispatch time of the first pending child

1954

_read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()

1955

throtl_select_dispatch( & service tree for active throtl groups )

1956

hrotl_schedule_next_dispatch - schedule the next dispatch cycle*@sq: the service_queue to schedule dispatch for*@force: force scheduling* Arm @sq->pending_timer so that the next dispatch cycle starts on the* dispatch time of the first pending child

1957

queue_work - queue work on a workqueue*@wq: workqueue to use*@work: work to queue* Returns %false if @work was already on a queue, %true otherwise.* We queue the work to the CPU on which it was submitted, but if the CPU dies

**Caller**
Name	Describe
throtl_pd_offline
throtl_pending_timer_fn
throtl_upgrade_check
blk_throtl_bio

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