mm: completely remove dumping per-cpu lists from show_mem()

It seems nobody needs this.

Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 2 insertions, 21 deletions

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 9c21b42d07bf..6571dd78e984 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1126,7 +1126,6 @@ extern void pagefault_out_of_memory(void);
  * various contexts.
  */
 #define SHOW_MEM_FILTER_NODES           (0x0001u)       /* disallowed nodes */
-#define SHOW_MEM_PERCPU_LISTS           (0x0002u)       /* per-zone per-cpu */
 
 extern void show_free_areas(unsigned int flags);
 extern bool skip_free_areas_node(unsigned int flags, int nid);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index eab8e2018a46..84466a4b1b36 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3255,7 +3255,6 @@ static void show_migration_types(unsigned char type)
  * Bits in @filter:
  * SHOW_MEM_FILTER_NODES: suppress nodes that are not allowed by current's
  *   cpuset.
- * SHOW_MEM_PERCPU_LISTS: display full per-node per-cpu pcp lists
  */
 void show_free_areas(unsigned int filter)
 {
@@ -3267,25 +3266,8 @@ void show_free_areas(unsigned int filter)
                 if (skip_free_areas_node(filter, zone_to_nid(zone)))
                         continue;
 
-                if (filter & SHOW_MEM_PERCPU_LISTS) {
-                        show_node(zone);
-                        printk("%s per-cpu:\n", zone->name);
-                }
-
-                for_each_online_cpu(cpu) {
-                        struct per_cpu_pageset *pageset;
-
-                        pageset = per_cpu_ptr(zone->pageset, cpu);
-
-                        free_pcp += pageset->pcp.count;
-
-                        if (!(filter & SHOW_MEM_PERCPU_LISTS))
-                                continue;
-
-                        printk("CPU %4d: hi:%5d, btch:%4d usd:%4d\n",
-                               cpu, pageset->pcp.high,
-                               pageset->pcp.batch, pageset->pcp.count);
-                }
+                for_each_online_cpu(cpu)
+                        free_pcp += per_cpu_ptr(zone->pageset, cpu)->pcp.count;
         }
 
         printk("active_anon:%lu inactive_anon:%lu isolated_anon:%lu\n"