throtl_can_upgrade

Name:throtl_can_upgrade

Proto:static bool throtl_can_upgrade(struct throtl_data *td, struct throtl_grp *this_tg)

Type:bool

Parameter:

Type	Parameter	Name
struct throtl_data *	td
struct throtl_grp *	this_tg

1893

If limit_index != LIMIT_LOW Then Return false

1896

If time_before(jiffies, low_downgrade_time + throtl_slice) Then Return false

1899

_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

1900

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)

1901

tg = blkg_to_tg(blkg)

1903

If tg == this_tg Then Continue

1905

If Not list_empty - tests whether a list is empty*@head: the list to test. Then Continue

1907

If Not throtl_hierarchy_can_upgrade(tg) Then

1908

_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()

1909

Return false

1912

_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()

1913

Return true

**Caller**
Name	Describe
throtl_pending_timer_fn
throtl_upgrade_check
blk_throtl_bio

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