diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2017-06-23 23:07:22 +0000 |
|---|---|---|
| committer | Johannes Weiner <hannes@cmpxchg.org> | 2017-06-23 23:07:22 +0000 |
| commit | a4a6db99e821a1552947f5f9ef1a57021e4fe398 (patch) | |
| tree | f685b2d08220c149f1abd9df184d6ef97066e656 | |
| parent | 42c8cbc2d31d56f10a67b57d4744c190cdd14d1d (diff) | |
watchdog-provide-watchdog_reconfigure-for-arch-watchdogs-fix
add code comments
Link: http://lkml.kernel.org/r/20170617125933.774d3858@roar.ozlabs.ibm.com
Cc: Don Zickus <dzickus@redhat.com>
Cc: Babu Moger <babu.moger@oracle.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | kernel/watchdog.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/kernel/watchdog.c b/kernel/watchdog.c index 06cd965f64d2..36531025496f 100644 --- a/kernel/watchdog.c +++ b/kernel/watchdog.c @@ -114,6 +114,10 @@ int __read_mostly watchdog_suspended; /* * These functions can be overridden if an architecture implements its * own hardlockup detector. + * + * watchdog_nmi_enable/disable can be implemented to start and stop when + * softlockup watchdog threads start and stop. The arch must select the + * SOFTLOCKUP_DETECTOR Kconfig. */ int __weak watchdog_nmi_enable(unsigned int cpu) { @@ -123,6 +127,17 @@ void __weak watchdog_nmi_disable(unsigned int cpu) { } +/* + * watchdog_nmi_reconfigure can be implemented to be notified after any + * watchdog configuration change. The arch hardlockup watchdog should + * respond to the following variables: + * - nmi_watchdog_enabled + * - watchdog_thresh + * - watchdog_cpumask + * - sysctl_hardlockup_all_cpu_backtrace + * - hardlockup_panic + * - watchdog_suspended + */ void __weak watchdog_nmi_reconfigure(void) { } |