diff options
Diffstat (limited to 'lib/Kconfig.debug')
| -rw-r--r-- | lib/Kconfig.debug | 78 |
1 files changed, 39 insertions, 39 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index ed7b01c4bd41..3e91fa33c7a0 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1035,11 +1035,39 @@ config BOOTPARAM_SOFTLOCKUP_PANIC Say N if unsure. -# Both the "perf" and "buddy" hardlockup detectors count hrtimer -# interrupts. This config enables functions managing this common code. -config HARDLOCKUP_DETECTOR_COUNTS_HRTIMER - bool - select SOFTLOCKUP_DETECTOR +# +# arch/ can define HAVE_HARDLOCKUP_DETECTOR_ARCH to provide their own hard +# lockup detector rather than the perf based detector. +# +config HARDLOCKUP_DETECTOR + bool "Detect Hard Lockups" + depends on DEBUG_KERNEL && !S390 + depends on HAVE_HARDLOCKUP_DETECTOR_NON_ARCH || HAVE_HARDLOCKUP_DETECTOR_ARCH + select LOCKUP_DETECTOR + select HARDLOCKUP_DETECTOR_NON_ARCH if HAVE_HARDLOCKUP_DETECTOR_NON_ARCH + + help + Say Y here to enable the kernel to act as a watchdog to detect + hard lockups. + + Hardlockups are bugs that cause the CPU to loop in kernel mode + for more than 10 seconds, without letting other interrupts have a + chance to run. The current stack trace is displayed upon detection + and the system will stay locked up. + +config HARDLOCKUP_DETECTOR_PREFER_BUDDY + bool "Prefer the buddy CPU hardlockup detector" + depends on HAVE_HARDLOCKUP_DETECTOR_PERF && SMP + help + Say Y here to prefer the buddy hardlockup detector over the perf one. + + With the buddy detector, each CPU uses its softlockup hrtimer + to check that the next CPU is processing hrtimer interrupts by + verifying that a counter is increasing. + + This hardlockup detector is useful on systems that don't have + an arch-specific hardlockup detector or if resources needed + for the hardlockup detector are better used for other things. config HARDLOCKUP_DETECTOR_PERF bool @@ -1051,6 +1079,12 @@ config HARDLOCKUP_DETECTOR_BUDDY depends on SMP select HARDLOCKUP_DETECTOR_COUNTS_HRTIMER +# Both the "perf" and "buddy" hardlockup detectors count hrtimer +# interrupts. This config enables functions managing this common code. +config HARDLOCKUP_DETECTOR_COUNTS_HRTIMER + bool + select SOFTLOCKUP_DETECTOR + # For hardlockup detectors you can have one directly provided by the arch # or use a "non-arch" one. If you're using a "non-arch" one that is # further divided the perf hardlockup detector (which, confusingly, needs @@ -1063,20 +1097,6 @@ config HAVE_HARDLOCKUP_DETECTOR_NON_ARCH depends on (HAVE_HARDLOCKUP_DETECTOR_PERF || SMP) && !HAVE_NMI_WATCHDOG default y -config HARDLOCKUP_DETECTOR_PREFER_BUDDY - bool "Prefer the buddy CPU hardlockup detector" - depends on HAVE_HARDLOCKUP_DETECTOR_PERF && SMP - help - Say Y here to prefer the buddy hardlockup detector over the perf one. - - With the buddy detector, each CPU uses its softlockup hrtimer - to check that the next CPU is processing hrtimer interrupts by - verifying that a counter is increasing. - - This hardlockup detector is useful on systems that don't have - an arch-specific hardlockup detector or if resources needed - for the hardlockup detector are better used for other things. - # This will select the appropriate non-arch hardlockdup detector config HARDLOCKUP_DETECTOR_NON_ARCH bool @@ -1091,26 +1111,6 @@ config HARDLOCKUP_DETECTOR_NON_ARCH config HARDLOCKUP_CHECK_TIMESTAMP bool -# -# arch/ can define HAVE_HARDLOCKUP_DETECTOR_ARCH to provide their own hard -# lockup detector rather than the perf based detector. -# -config HARDLOCKUP_DETECTOR - bool "Detect Hard Lockups" - depends on DEBUG_KERNEL && !S390 - depends on HAVE_HARDLOCKUP_DETECTOR_NON_ARCH || HAVE_HARDLOCKUP_DETECTOR_ARCH - select LOCKUP_DETECTOR - select HARDLOCKUP_DETECTOR_NON_ARCH if HAVE_HARDLOCKUP_DETECTOR_NON_ARCH - - help - Say Y here to enable the kernel to act as a watchdog to detect - hard lockups. - - Hardlockups are bugs that cause the CPU to loop in kernel mode - for more than 10 seconds, without letting other interrupts have a - chance to run. The current stack trace is displayed upon detection - and the system will stay locked up. - config BOOTPARAM_HARDLOCKUP_PANIC bool "Panic (Reboot) On Hard Lockups" depends on HARDLOCKUP_DETECTOR |