mm: add kernel_misc_reclaimable in show_free_areas

Print NR_KERNEL_MISC_RECLAIMABLE stat from show_free_areas() so users can
check whether the shrinker is working correctly and to show the current
memory usage.

Link: https://lkml.kernel.org/r/20210813104725.4562-1-liuhailong@oppo.com
Signed-off-by: liuhailong <liuhailong@oppo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 51c17bf7b127fb44ecd137e4577411ddf212ee46..60a867a549bdcb6bd51aa26cd89d2e90d62bf664 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5903,6 +5903,7 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask)
                " unevictable:%lu dirty:%lu writeback:%lu\n"
                " slab_reclaimable:%lu slab_unreclaimable:%lu\n"
                " mapped:%lu shmem:%lu pagetables:%lu bounce:%lu\n"
+               " kernel_misc_reclaimable:%lu\n"
                " free:%lu free_pcp:%lu free_cma:%lu\n",
                global_node_page_state(NR_ACTIVE_ANON),
                global_node_page_state(NR_INACTIVE_ANON),
@@ -5919,6 +5920,7 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask)
                global_node_page_state(NR_SHMEM),
                global_node_page_state(NR_PAGETABLE),
                global_zone_page_state(NR_BOUNCE),
+               global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE),
                global_zone_page_state(NR_FREE_PAGES),
                free_pcp,
                global_zone_page_state(NR_FREE_CMA_PAGES));