[PATCH v2 1/2] mm/show_mem: Dump the status of the mem alloc profiling before printing

[Yueyang Pan <pyyjason@gmail.com>]

This patch prints the status of the memory allocation profiling
before __show_mem actually prints the detailed allocation info.
This way will let us know the `0B` we saw in allocation info is
because the profiling is disabled or the allocation is actually
0B.

Signed-off-by: Yueyang Pan <pyyjason@gmail.com>
---
 mm/show_mem.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/show_mem.c b/mm/show_mem.c
index ecf20a93ea54..51892ce2efc4 100644
--- a/mm/show_mem.c
+++ b/mm/show_mem.c
@@ -427,6 +427,8 @@ void __show_mem(unsigned int filter, nodemask_t *nodemask, int max_zone_idx)
 
 		nr = alloc_tag_top_users(tags, ARRAY_SIZE(tags), false);
 		if (nr) {
+			pr_notice("Memory alloction profiling is turned %s\n",
+				mem_alloc_profiling_enabled() ? "on" : "off");
 			pr_notice("Memory allocations:\n");
 			for (i = 0; i < nr; i++) {
 				struct codetag *ct = tags[i].ct;
-- 
2.47.3