函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\events\ring_buffer.c Create Date:2022-07-27 15:03:30
Last Modify:2020-03-12 14:18:49 Copyright©Brick
首页 函数Tree
注解内核,赢得工具下载SCCTEnglish

函数名称:rb_free_aux

函数原型:void rb_free_aux(struct ring_buffer *rb)

返回类型:void

参数:

类型参数名称
struct ring_buffer *rb
758  如果_dec_and_test - decrement a refcount and test if it is 0*@r: the refcount* Similar to atomic_dec_and_test(), it will WARN on underflow and fail to* decrement when saturated at REFCOUNT_SATURATED__rb_free_aux(rb)
调用者
名称描述
perf_aux_output_beginThis is called before hardware starts writing to the AUX area to* obtain an output handle and make sure there's room in the buffer
perf_aux_output_endCommit the data written by hardware into the ring buffer by adjusting* aux_head and posting a PERF_RECORD_AUX into the perf buffer. It is the* pmu driver's responsibility to observe ordering rules of the hardware,
perf_mmap_closeA buffer can be mmap()ed multiple times; either directly through the same* event, or through other events by use of perf_event_set_output().* In order to undo the VM accounting done by perf_mmap() we need to destroy