tracing: Use pid bitmap instead of a pid array for set_event_pid

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In order to add the ability to let tasks that are filtered by the events
have their children also be traced on fork (and then not traced on exit),
convert the array into a pid bitmask. Most of the time the number of pids is
only 32768 pids or a 4k bitmask, which is the same size as the default list
currently is, and that list could grow if more pids are listed.

This also greatly simplifies the code.

Suggested-by: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

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This commit is contained in:

Steven Rostedt 2016-04-13 16:27:49 -04:00

parent 9ebc57cfaa

commit f4d34a87e9

2 changed files with 102 additions and 124 deletions

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5

kernel/trace/trace.h

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221

kernel/trace/trace_events.c

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