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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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f74f8bb246
Add a monitor for checking that real-time tasks do not go to sleep in a manner that may cause undesirable latency. Also change RV depends on TRACING to RV select TRACING to avoid the following recursive dependency: error: recursive dependency detected! symbol TRACING is selected by PREEMPTIRQ_TRACEPOINTS symbol PREEMPTIRQ_TRACEPOINTS depends on TRACE_IRQFLAGS symbol TRACE_IRQFLAGS is selected by RV_MON_SLEEP symbol RV_MON_SLEEP depends on RV symbol RV depends on TRACING Cc: John Ogness <john.ogness@linutronix.de> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Link: https://lore.kernel.org/75bc5bcc741d153aa279c95faf778dff35c5c8ad.1752088709.git.namcao@linutronix.de Reviewed-by: Gabriele Monaco <gmonaco@redhat.com> Signed-off-by: Nam Cao <namcao@linutronix.de> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
22 lines
733 B
Text
22 lines
733 B
Text
RULE = always ((RT and SLEEP) imply (RT_FRIENDLY_SLEEP or ALLOWLIST))
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RT_FRIENDLY_SLEEP = (RT_VALID_SLEEP_REASON or KERNEL_THREAD)
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and ((not WAKE) until RT_FRIENDLY_WAKE)
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RT_VALID_SLEEP_REASON = FUTEX_WAIT
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or RT_FRIENDLY_NANOSLEEP
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RT_FRIENDLY_NANOSLEEP = CLOCK_NANOSLEEP
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and NANOSLEEP_TIMER_ABSTIME
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and (NANOSLEEP_CLOCK_MONOTONIC or NANOSLEEP_CLOCK_TAI)
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RT_FRIENDLY_WAKE = WOKEN_BY_EQUAL_OR_HIGHER_PRIO
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or WOKEN_BY_HARDIRQ
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or WOKEN_BY_NMI
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or ABORT_SLEEP
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or KTHREAD_SHOULD_STOP
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ALLOWLIST = BLOCK_ON_RT_MUTEX
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or FUTEX_LOCK_PI
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or TASK_IS_RCU
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or TASK_IS_MIGRATION
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