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authorFrederic Weisbecker <fweisbec@gmail.com>2010-05-15 22:30:22 +0200
committerFrederic Weisbecker <fweisbec@gmail.com>2010-05-16 01:57:27 +0200
commite16bb1d7fe07609bc8b0e4c043eff2f47ada78d8 (patch)
tree601b142677b67155f23f1413bd651c552ad54fa5 /lib/Kconfig.debug
parent5e85391b3badd3f0e50ebdd0cafe0202a979f73a (diff)
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lockup_detector: Update some config
We kept CONFIG_DETECT_SOFTLOCKUP around for compatibility with older configs. But it was enabled by default if CONFIG_DEBUG_KERNEL. So if we want to enable CONFIG_LOCKUP_DETECTOR on configs that had CONFIG_DETECT_SOFTLOCKUP, all we need is to have the same enabling by default if CONFIG_DEBUG_KERNEL. We can then remove CONFIG_DETECT_SOFTLOCKUP directly. So tag CONFIG_LOCKUP_DETECTOR as default y. This is what we want for most serious kernel debugging anyway. And also forbid the lockup detector in S390 as it was for the previous softlockup detector, event though the true reason for that is not outlined. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Don Zickus <dzickus@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Diffstat (limited to 'lib/Kconfig.debug')
-rw-r--r--lib/Kconfig.debug25
1 files changed, 3 insertions, 22 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 755713a359e..3a18b0b856c 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -152,29 +152,10 @@ config DEBUG_SHIRQ
Drivers ought to be able to handle interrupts coming in at those
points; some don't and need to be caught.
-config DETECT_SOFTLOCKUP
- bool
- depends on DEBUG_KERNEL && !S390
- default y
- help
- Say Y here to enable the kernel to detect "soft lockups",
- which are bugs that cause the kernel to loop in kernel
- mode for more than 60 seconds, without giving other tasks a
- chance to run.
-
- When a soft-lockup is detected, the kernel will print the
- current stack trace (which you should report), but the
- system will stay locked up. This feature has negligible
- overhead.
-
- (Note that "hard lockups" are separate type of bugs that
- can be detected via the NMI-watchdog, on platforms that
- support it.)
-
config LOCKUP_DETECTOR
bool "Detect Hard and Soft Lockups"
- depends on DEBUG_KERNEL
- default DETECT_SOFTLOCKUP
+ depends on DEBUG_KERNEL && !S390
+ default y
help
Say Y here to enable the kernel to act as a watchdog to detect
hard and soft lockups.
@@ -212,7 +193,7 @@ config BOOTPARAM_SOFTLOCKUP_PANIC
config BOOTPARAM_SOFTLOCKUP_PANIC_VALUE
int
- depends on DETECT_SOFTLOCKUP
+ depends on LOCKUP_DETECTOR
range 0 1
default 0 if !BOOTPARAM_SOFTLOCKUP_PANIC
default 1 if BOOTPARAM_SOFTLOCKUP_PANIC