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Userspace real-time applications may have design flaws that they raise page faults in real-time threads, and thus have unexpected latencies. Add an linear temporal logic monitor to detect this scenario. 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/78fea8a2de6d058241d3c6502c1a92910772b0ed.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>
20 lines
608 B
Text
20 lines
608 B
Text
# SPDX-License-Identifier: GPL-2.0-only
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#
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config RV_MON_PAGEFAULT
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depends on RV
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select RV_LTL_MONITOR
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depends on RV_MON_RTAPP
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depends on X86 || RISCV
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default y
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select LTL_MON_EVENTS_ID
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bool "pagefault monitor"
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help
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Monitor that real-time tasks do not raise page faults, causing
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undesirable latency.
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If you are developing a real-time system and not entirely sure whether
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the applications are designed correctly for real-time, you want to say
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Y here.
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This monitor does not affect execution speed while it is not running,
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therefore it is safe to enable this in production kernel.
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