linux-kernel - [PATCH] mm: completely remove dumping per-cpu lists from show

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Date:	Thu, 26 Feb 2015 09:14:54 +0300
From:	Konstantin Khlebnikov <koct9i@...il.com>
To:	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Cc:	Michal Hocko <mhocko@...e.cz>
Subject: [PATCH] mm: completely remove dumping per-cpu lists from show_mem()

It seems nobody needs this.

Signed-off-by: Konstantin Khlebnikov <koct9i@...il.com>
---
 include/linux/mm.h |    1 -
 mm/page_alloc.c    |   22 ++--------------------
 2 files changed, 2 insertions(+), 21 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 9c21b42..6571dd78 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 a120bce..8ddcb0e 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3254,7 +3254,6 @@ 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)
 {
@@ -3266,25 +3265,8 @@ 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"

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