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Half of the test in instance-event.tc was updated to use $! to find the PID
of the previous background process that was launched, but the second part of
the test still used the parsing of "jobs", which does not work on all shells
like $! does.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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Add a new ftrace test that creates three threads. One that creates and
removes an ftrace instance, one that reads the instance, and one that enables
and disables events in the instance. This is a stress test for accessing and
removing instances at the same time.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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The ftracetest instance test used parsing of the "jobs" output to find the
pid of the subshell that is executed previously. But this is not portable to
all major shells that may run these tests. The proper way to get the pid of
the subshell is the shell command "$!". This will return the pid of the
previously executed command. Use that instead, otherwise the test does not
work in all environments.
Link: http://lkml.kernel.org/r/20151211143617.65f4d7a1@gandalf.local.home
Reported-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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Create a test to test instance creation and deletion. Several tasks are
created that create 3 directories and delete them. The tasks all create the
same directories. This places a stress on the code that creates and deletes
instances.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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