mm: add show num_poisoned_pages when oom

Show num_poisoned_pages when oom, it is a little helpful to find the reason. Also it will be emitted anytime show_mem() is called.

Signed-off-by Xishi Qiu <[email protected]>

Suggested-by Naoya Horiguchi <[email protected]>

Acked-by Michal Hocko <[email protected]>

Acked-by David Rientjes <[email protected]>

---
lib/show_mem.c | 3 +++

1 files changed, 3 insertions(+), 0 deletions(-)

lib/show_mem.c +3 -0

index 5847a49..1cbdcd8 100644
@@ -46,4 +46,7 @@ void show_mem(unsigned int filter)
 	printk("%lu pages in pagetable cache\n",
 		quicklist_total_size());
 #endif
+#ifdef CONFIG_MEMORY_FAILURE
+	printk("%lu pages hwpoisoned\n", atomic_long_read(&num_poisoned_pages));
+#endif
 }

Signature · 8 lines

1.7.1


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Show num_poisoned_pages when oom, it is a little helpful to find the reason. Also it will be emitted anytime show_mem() is called.

Signed-off-by Xishi Qiu <[email protected]>

Suggested-by Naoya Horiguchi <[email protected]>

Acked-by Michal Hocko <[email protected]>

Acked-by David Rientjes <[email protected]>

---
 lib/show_mem.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

lib/show_mem.c +0 -0

index 5847a49..1cbdcd8 100644