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| author | Don Zickus <dzickus@redhat.com> | 2010-02-05 21:47:05 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-02-08 08:29:03 +0100 |
| commit | 84e478c6f1eb9c4bfa1fff2f8108e9a061b46428 (patch) | |
| tree | 15be1e0d92d4439e49ecc98a504589dc596fc211 /lib | |
| parent | 1fb9d6ad2766a1dd70d167552988375049a97f21 (diff) | |
| download | linux-84e478c6f1eb9c4bfa1fff2f8108e9a061b46428.tar.gz linux-84e478c6f1eb9c4bfa1fff2f8108e9a061b46428.tar.bz2 linux-84e478c6f1eb9c4bfa1fff2f8108e9a061b46428.zip | |
nmi_watchdog: Config option to enable new nmi_watchdog
These are the bits that enable the new nmi_watchdog and safely
isolate the old nmi_watchdog. Only one or the other can run,
not both at the same time.
Signed-off-by: Don Zickus <dzickus@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: gorcunov@gmail.com
Cc: aris@redhat.com
Cc: peterz@infradead.org
LKML-Reference: <1265424425-31562-4-git-send-email-dzickus@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.debug | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 25c3ed594c54..f80b67e72aa0 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -170,6 +170,19 @@ config DETECT_SOFTLOCKUP can be detected via the NMI-watchdog, on platforms that support it.) +config NMI_WATCHDOG + bool "Detect Hard Lockups with an NMI Watchdog" + depends on DEBUG_KERNEL && PERF_EVENTS + default y + help + Say Y here to enable the kernel to use the NMI as a watchdog + to detect hard lockups. This is useful when a cpu hangs for no + reason but can still respond to NMIs. A backtrace is displayed + for reviewing and reporting. + + The overhead should be minimal, just an extra NMI every few + seconds. + config BOOTPARAM_SOFTLOCKUP_PANIC bool "Panic (Reboot) On Soft Lockups" depends on DETECT_SOFTLOCKUP |