blk_mq_freeze_queue

Name:blk_mq_freeze_queue

Proto:void blk_mq_freeze_queue(struct request_queue *q)

Type:void

Parameter:

Type	Parameter	Name
struct request_queue *	q

182

Guarantee no request is in use, so we can change any data structure of* the queue afterward.

**Caller**
Name	Describe
elevator_switch	switch to new_e io scheduler. be careful not to introduce deadlocks -* we don't free the old io scheduler, before we have allocated what we* need for the new one. this way we have a chance of going back to the old
queue_wb_lat_store
blk_mq_update_tag_set_depth
blk_mq_update_nr_requests
__blk_mq_update_nr_hw_queues
blkcg_activate_policy	lkcg_activate_policy - activate a blkcg policy on a request_queue@q: request_queue of interest@pol: blkcg policy to activate* Activate @pol on @q
blkcg_deactivate_policy	lkcg_deactivate_policy - deactivate a blkcg policy on a request_queue@q: request_queue of interest@pol: blkcg policy to deactivate* Deactivate @pol on @q. Follows the same synchronization rules as* blkcg_activate_policy().
iolatency_set_limit
blk_revalidate_disk_zones	lk_revalidate_disk_zones - (re)allocate and initialize zone bitmaps@disk: Target disk Helper function for low-level device drivers to (re) allocate and initialize* a disk request queue zone bitmaps. This functions should normally be called

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