percpu_ref

函数名称：percpu_ref_kill - drop the initial ref*@ref: percpu_ref to kill* Must be used to drop the initial ref on a percpu refcount; must be called* precisely once before shutdown.* Switches @ref into atomic mode before gathering up the percpu counters

函数原型：static inline void percpu_ref_kill(struct percpu_ref *ref)

返回类型：void

参数：

类型	参数	名称
struct percpu_ref *	ref

**调用者**
名称	描述
cgroup_kill_sb
cgroup_destroy_locked	group_destroy_locked - the first stage of cgroup destruction@cgrp: cgroup to be destroyed css's make use of percpu refcnts whose killing latency shouldn't be* exposed to userland and are RCU protected
cgroup_bpf_offline
blk_freeze_queue_start
blkg_destroy
free_ioctx_users	When this function runs, the kioctx has been removed from the "hash table"* and ctx->users has dropped to 0, so we know no more kiocbs can be submitted -* now it's safe to cancel any that need to be.
kill_ioctx	kill_ioctx* Cancels all outstanding aio requests on an aio context. Used* when the processes owning a context have all exited to encourage* the rapid destruction of the kioctx.
io_ring_ctx_wait_and_kill
__io_uring_register
hd_struct_kill

函数逻辑报告