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perf_event_open.2: Clarify issues with the disabled bit 

Clarify the perf_event_open behavior with respect to the disabled
bit and creating event groups.

Reported-by: Sudhanshu Goswami <Sudhanshu.Goswami@emc.com>
Signed-off-by: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Vince Weaver 2013-12-19 17:04:39 -05:00 committed by Michael Kerrisk
parent bea10c8c40
commit 406650db6b
1 changed files with 11 additions and 0 deletions
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man2/perf_event_open.2
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@ -739,6 +739,17 @@ If disabled, the event can later be enabled by
.BR prctl (2),
or
.IR enable_on_exec .
When creating an event group, typically the group leader is initialized
with
.I disabled
set to 1 and any child events are initialized with
.I disabled
set to 0.
Despite
.I disabled
being 0, the child events will not start until the group leader
is enabled.
.TP
.IR "inherit"
The