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[ Upstream commit07b60713b5] When running event-no-pid test on small machines (e.g. cloud 1-core instance), other events might not happen: + cat trace + cnt=0 + [ 0 -eq 0 ] + fail No other events were recorded [15] event tracing - restricts events based on pid notrace filtering [FAIL] Schedule a simple sleep task to be sure that some other process events get recorded. Fixes:ebed9628f5("selftests/ftrace: Add test to test new set_event_notrace_pid file") Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>