[Devel] [PATCH rh7] kernel/sysrq: reset watchdog on all cpus while during sysrq-w

[Andrey Ryabinin]

Lengthy output of sysrq-w may take a lot of time on slow serial console.
Currently we reset NMI-watchdog on the current cpu to avoid softlockup,
however this doesn't work since watchdog might be triggered on the other
cpu which is waits for proceeding an IPI.

Reset watchdog on all cpus to prevent spurious softlockup messages.

https://jira.sw.ru/browse/PSBM-47486

Signed-off-by: Andrey Ryabinin <aryabinin at virtuozzo.com>
---
 kernel/sched/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 2c147c8..d21ccf0 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5177,7 +5177,7 @@ void show_state_filter(unsigned long state_filter)
 		 * reset the NMI-timeout, listing all files on a slow
 		 * console might take a lot of time:
 		 */
-		touch_nmi_watchdog();
+		touch_all_softlockup_watchdogs();
 		if (!state_filter || (p->state & state_filter))
 			sched_show_task(p);
 	} while_each_thread(g, p);
-- 
2.7.3