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SubjectRe: [PATCH] perf/ftrace : Fix repetitious traces when specify a target task
On Tue, Oct 10, 2017 at 08:18:13PM +0800, chengjian (D) wrote:

> and what cases should the events be delivered multiple times?


Task-A Task-B Task-C Task-D

fd = sys_perf_event_open(B) fd = sys_perf_event_open(C)

wake_up_process(C)

Here A traces B, and D traces C. When B wakes C, we want both A and D to
get the event.


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