ftrace: add ability to only trace swapper tasks

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Impact: new feature

This patch lets the swapper tasks of all CPUS be filtered by the
set_ftrace_pid file.

If '0' is echoed into this file, then all the idle tasks (aka swapper)
is flagged to be traced.  This affects all CPU idle tasks.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Steven Rostedt 2008-12-04 00:26:41 -05:00 • committed by Ingo Molnar

parent 978f3a45d9

commit e32d895691

1 changed files with 63 additions and 11 deletions

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kernel/trace/ftrace.c

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