Disabling the Hard Lockup Watchdog until the memory transfer is complete.
This avoids hard lockup seen while the memory is still in progress when the
system is heavily loaded and a lot of pages are still not transferred on
the arrival side.
Signed-off-by: Laurent Dufour <lduf...@linux.ibm.com>
---
arch/powerpc/platforms/pseries/mobility.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/mobility.c
b/arch/powerpc/platforms/pseries/mobility.c
index 55612a1b07d6..061d4faefefb 100644
--- a/arch/powerpc/platforms/pseries/mobility.c
+++ b/arch/powerpc/platforms/pseries/mobility.c
@@ -701,6 +701,9 @@ static int pseries_migrate_partition(u64 handle)
vas_migration_handler(VAS_SUSPEND);
+ pr_debug("Disabling the NMI watchdog\n");
+ watchdog_nmi_stop();
+
ret = pseries_suspend(handle);
if (ret == 0) {
post_mobility_fixup();
@@ -708,6 +711,9 @@ static int pseries_migrate_partition(u64 handle)
} else
pseries_cancel_migration(handle, ret);
+ pr_debug("Enabling the NMI watchdog again\n");
+ watchdog_nmi_start();
+
vas_migration_handler(VAS_RESUME);
return ret;
--
2.36.1
