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Date: Tue, 17 Jan 2017 10:15:42 +0100
From: Michal Hocko <mhocko@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Johannes Weiner <hannes@...xchg.org>, Mel Gorman <mgorman@...e.de>,
Vlastimil Babka <vbabka@...e.cz>,
David Rientjes <rientjes@...gle.com>, <linux-mm@...ck.org>,
LKML <linux-kernel@...r.kernel.org>,
Michal Hocko <mhocko@...e.com>,
Tony Luck <tony.luck@...el.com>,
Fenghua Yu <fenghua.yu@...el.com>,
"James E.J. Bottomley" <jejb@...isc-linux.org>,
"David S. Miller" <davem@...emloft.net>,
linux-ia64@...r.kernel.org, linux-parisc@...r.kernel.org
Subject: [PATCH 3/4] arch, mm: remove arch specific show_mem
From: Michal Hocko <mhocko@...e.com>
We have a generic implementation for quite some time already. If there
is any arch specific information to be printed then we should add a
callback called from the generic code rather than duplicate the whole
show_mem. The current code has resulted in the code duplication and
the output divergence which is both confusing and adds maintainance
costs. Let's just get rid of this mess.
Cc: Tony Luck <tony.luck@...el.com>
Cc: Fenghua Yu <fenghua.yu@...el.com>
Cc: "James E.J. Bottomley" <jejb@...isc-linux.org>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: linux-ia64@...r.kernel.org
Cc: linux-parisc@...r.kernel.org
Acked-by: Guan Xuetao <gxt@...c.pku.edu.cn> [UniCore32]
Acked-by: Helge Deller <deller@....de> [for parisc]
Acked-by: Chris Metcalf <cmetcalf@...lanox.com> [for tile]
Acked-by: Mel Gorman <mgorman@...e.de>
Acked-by: Johannes Weiner <hannes@...xchg.org>
Signed-off-by: Michal Hocko <mhocko@...e.com>
---
arch/ia64/mm/init.c | 48 -----------------------------------------------
arch/parisc/mm/init.c | 49 ------------------------------------------------
arch/sparc/mm/init_32.c | 11 -----------
arch/tile/mm/pgtable.c | 45 --------------------------------------------
arch/unicore32/mm/init.c | 44 -------------------------------------------
5 files changed, 197 deletions(-)
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 1841ef69183d..46afc8d5ebfc 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -684,51 +684,3 @@ int arch_remove_memory(u64 start, u64 size)
}
#endif
#endif
-
-/**
- * show_mem - give short summary of memory stats
- *
- * Shows a simple page count of reserved and used pages in the system.
- * For discontig machines, it does this on a per-pgdat basis.
- */
-void show_mem(unsigned int filter)
-{
- int total_reserved = 0;
- unsigned long total_present = 0;
- pg_data_t *pgdat;
-
- printk(KERN_INFO "Mem-info:\n");
- show_free_areas(filter);
- printk(KERN_INFO "Node memory in pages:\n");
- for_each_online_pgdat(pgdat) {
- unsigned long present;
- unsigned long flags;
- int reserved = 0;
- int nid = pgdat->node_id;
- int zoneid;
-
- if (skip_free_areas_node(filter, nid))
- continue;
- pgdat_resize_lock(pgdat, &flags);
-
- for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) {
- struct zone *zone = &pgdat->node_zones[zoneid];
- if (!populated_zone(zone))
- continue;
-
- reserved += zone->present_pages - zone->managed_pages;
- }
- present = pgdat->node_present_pages;
-
- pgdat_resize_unlock(pgdat, &flags);
- total_present += present;
- total_reserved += reserved;
- printk(KERN_INFO "Node %4d: RAM: %11ld, rsvd: %8d, ",
- nid, present, reserved);
- }
- printk(KERN_INFO "%ld pages of RAM\n", total_present);
- printk(KERN_INFO "%d reserved pages\n", total_reserved);
- printk(KERN_INFO "Total of %ld pages in page table cache\n",
- quicklist_total_size());
- printk(KERN_INFO "%ld free buffer pages\n", nr_free_buffer_pages());
-}
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index e02ada312be8..64bfdf636f39 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -653,55 +653,6 @@ void __init mem_init(void)
unsigned long *empty_zero_page __read_mostly;
EXPORT_SYMBOL(empty_zero_page);
-void show_mem(unsigned int filter)
-{
- int total = 0,reserved = 0;
- pg_data_t *pgdat;
-
- printk(KERN_INFO "Mem-info:\n");
- show_free_areas(filter);
-
- for_each_online_pgdat(pgdat) {
- unsigned long flags;
- int zoneid;
-
- pgdat_resize_lock(pgdat, &flags);
- for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) {
- struct zone *zone = &pgdat->node_zones[zoneid];
- if (!populated_zone(zone))
- continue;
-
- total += zone->present_pages;
- reserved = zone->present_pages - zone->managed_pages;
- }
- pgdat_resize_unlock(pgdat, &flags);
- }
-
- printk(KERN_INFO "%d pages of RAM\n", total);
- printk(KERN_INFO "%d reserved pages\n", reserved);
-
-#ifdef CONFIG_DISCONTIGMEM
- {
- struct zonelist *zl;
- int i, j;
-
- for (i = 0; i < npmem_ranges; i++) {
- zl = node_zonelist(i, 0);
- for (j = 0; j < MAX_NR_ZONES; j++) {
- struct zoneref *z;
- struct zone *zone;
-
- printk("Zone list for zone %d on node %d: ", j, i);
- for_each_zone_zonelist(zone, z, zl, j)
- printk("[%d/%s] ", zone_to_nid(zone),
- zone->name);
- printk("\n");
- }
- }
- }
-#endif
-}
-
/*
* pagetable_init() sets up the page tables
*
diff --git a/arch/sparc/mm/init_32.c b/arch/sparc/mm/init_32.c
index eb8287155279..c6afe98de4d9 100644
--- a/arch/sparc/mm/init_32.c
+++ b/arch/sparc/mm/init_32.c
@@ -55,17 +55,6 @@ extern unsigned int sparc_ramdisk_size;
unsigned long highstart_pfn, highend_pfn;
-void show_mem(unsigned int filter)
-{
- printk("Mem-info:\n");
- show_free_areas(filter);
- printk("Free swap: %6ldkB\n",
- get_nr_swap_pages() << (PAGE_SHIFT-10));
- printk("%ld pages of RAM\n", totalram_pages);
- printk("%ld free pages\n", nr_free_pages());
-}
-
-
unsigned long last_valid_pfn;
unsigned long calc_highpages(void)
diff --git a/arch/tile/mm/pgtable.c b/arch/tile/mm/pgtable.c
index 7cc6ee7f1a58..492a7361e58e 100644
--- a/arch/tile/mm/pgtable.c
+++ b/arch/tile/mm/pgtable.c
@@ -36,51 +36,6 @@
#define K(x) ((x) << (PAGE_SHIFT-10))
-/*
- * The normal show_free_areas() is too verbose on Tile, with dozens
- * of processors and often four NUMA zones each with high and lowmem.
- */
-void show_mem(unsigned int filter)
-{
- struct zone *zone;
-
- pr_err("Active:%lu inactive:%lu dirty:%lu writeback:%lu unstable:%lu free:%lu\n slab:%lu mapped:%lu pagetables:%lu bounce:%lu pagecache:%lu swap:%lu\n",
- (global_node_page_state(NR_ACTIVE_ANON) +
- global_node_page_state(NR_ACTIVE_FILE)),
- (global_node_page_state(NR_INACTIVE_ANON) +
- global_node_page_state(NR_INACTIVE_FILE)),
- global_node_page_state(NR_FILE_DIRTY),
- global_node_page_state(NR_WRITEBACK),
- global_node_page_state(NR_UNSTABLE_NFS),
- global_page_state(NR_FREE_PAGES),
- (global_page_state(NR_SLAB_RECLAIMABLE) +
- global_page_state(NR_SLAB_UNRECLAIMABLE)),
- global_node_page_state(NR_FILE_MAPPED),
- global_page_state(NR_PAGETABLE),
- global_page_state(NR_BOUNCE),
- global_node_page_state(NR_FILE_PAGES),
- get_nr_swap_pages());
-
- for_each_zone(zone) {
- unsigned long flags, order, total = 0, largest_order = -1;
-
- if (!populated_zone(zone))
- continue;
-
- spin_lock_irqsave(&zone->lock, flags);
- for (order = 0; order < MAX_ORDER; order++) {
- int nr = zone->free_area[order].nr_free;
- total += nr << order;
- if (nr)
- largest_order = order;
- }
- spin_unlock_irqrestore(&zone->lock, flags);
- pr_err("Node %d %7s: %lukB (largest %luKb)\n",
- zone_to_nid(zone), zone->name,
- K(total), largest_order ? K(1UL) << largest_order : 0);
- }
-}
-
/**
* shatter_huge_page() - ensure a given address is mapped by a small page.
*
diff --git a/arch/unicore32/mm/init.c b/arch/unicore32/mm/init.c
index be2bde9b07cf..f4950fbfe574 100644
--- a/arch/unicore32/mm/init.c
+++ b/arch/unicore32/mm/init.c
@@ -57,50 +57,6 @@ early_param("initrd", early_initrd);
*/
struct meminfo meminfo;
-void show_mem(unsigned int filter)
-{
- int free = 0, total = 0, reserved = 0;
- int shared = 0, cached = 0, slab = 0, i;
- struct meminfo *mi = &meminfo;
-
- printk(KERN_DEFAULT "Mem-info:\n");
- show_free_areas(filter);
-
- for_each_bank(i, mi) {
- struct membank *bank = &mi->bank[i];
- unsigned int pfn1, pfn2;
- struct page *page, *end;
-
- pfn1 = bank_pfn_start(bank);
- pfn2 = bank_pfn_end(bank);
-
- page = pfn_to_page(pfn1);
- end = pfn_to_page(pfn2 - 1) + 1;
-
- do {
- total++;
- if (PageReserved(page))
- reserved++;
- else if (PageSwapCache(page))
- cached++;
- else if (PageSlab(page))
- slab++;
- else if (!page_count(page))
- free++;
- else
- shared += page_count(page) - 1;
- page++;
- } while (page < end);
- }
-
- printk(KERN_DEFAULT "%d pages of RAM\n", total);
- printk(KERN_DEFAULT "%d free pages\n", free);
- printk(KERN_DEFAULT "%d reserved pages\n", reserved);
- printk(KERN_DEFAULT "%d slab pages\n", slab);
- printk(KERN_DEFAULT "%d pages shared\n", shared);
- printk(KERN_DEFAULT "%d pages swap cached\n", cached);
-}
-
static void __init find_limits(unsigned long *min, unsigned long *max_low,
unsigned long *max_high)
{
--
2.11.0
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