[PATCH] mm/page_alloc: avoid hard lockups in __alloc_pages_bulk()

[qiang . zhang]

From: Zqiang <qiang.zhang@xxxxxxxxxxxxx>

The __alloc_pages_bulk() mainly used for batch allocation of
order-0 pages, in the case of holding pagesets.lock, if too
many pages are required, maybe trigger hard lockup watchdog.

Signed-off-by: Zqiang <qiang.zhang@xxxxxxxxxxxxx>
---
 mm/page_alloc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d6e94cc8066c..1127db25507f 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5315,6 +5315,8 @@ unsigned long __alloc_pages_bulk(gfp_t gfp, int preferred_nid,
 		else
 			page_array[nr_populated] = page;
 		nr_populated++;
+
+		touch_nmi_watchdog();
 	}
 
 	local_unlock_irqrestore(&pagesets.lock, flags);
-- 
2.25.1