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authorMel Gorman <mgorman@suse.de>2014-01-21 15:49:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-21 16:19:44 -0800
commitaec6a8889a98a0cd58357cd0937a25189908f191 (patch)
tree4c0bd0fa7a3d9e6edc0f863782e1d5807ebefb12 /arch/parisc
parentece86e222db48d04bda218a2be70e384518bb08c (diff)
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mm, show_mem: remove SHOW_MEM_FILTER_PAGE_COUNT
Commit 4b59e6c47309 ("mm, show_mem: suppress page counts in non-blockable contexts") introduced SHOW_MEM_FILTER_PAGE_COUNT to suppress PFN walks on large memory machines. Commit c78e93630d15 ("mm: do not walk all of system memory during show_mem") avoided a PFN walk in the generic show_mem helper which removes the requirement for SHOW_MEM_FILTER_PAGE_COUNT in that case. This patch removes PFN walkers from the arch-specific implementations that report on a per-node or per-zone granularity. ARM and unicore32 still do a PFN walk as they report memory usage on each bank which is a much finer granularity where the debugging information may still be of use. As the remaining arches doing PFN walks have relatively small amounts of memory, this patch simply removes SHOW_MEM_FILTER_PAGE_COUNT. [akpm@linux-foundation.org: fix parisc] Signed-off-by: Mel Gorman <mgorman@suse.de> Acked-by: David Rientjes <rientjes@google.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: James Bottomley <jejb@parisc-linux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/parisc')
-rw-r--r--arch/parisc/mm/init.c59
1 files changed, 17 insertions, 42 deletions
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index 96f8168cf4ec..ae085ad0fba0 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -645,55 +645,30 @@ EXPORT_SYMBOL(empty_zero_page);
void show_mem(unsigned int filter)
{
- int i,free = 0,total = 0,reserved = 0;
- int shared = 0, cached = 0;
+ int total = 0,reserved = 0;
+ pg_data_t *pgdat;
printk(KERN_INFO "Mem-info:\n");
show_free_areas(filter);
- if (filter & SHOW_MEM_FILTER_PAGE_COUNT)
- return;
-#ifndef CONFIG_DISCONTIGMEM
- i = max_mapnr;
- while (i-- > 0) {
- total++;
- if (PageReserved(mem_map+i))
- reserved++;
- else if (PageSwapCache(mem_map+i))
- cached++;
- else if (!page_count(&mem_map[i]))
- free++;
- else
- shared += page_count(&mem_map[i]) - 1;
- }
-#else
- for (i = 0; i < npmem_ranges; i++) {
- int j;
- for (j = node_start_pfn(i); j < node_end_pfn(i); j++) {
- struct page *p;
- unsigned long flags;
-
- pgdat_resize_lock(NODE_DATA(i), &flags);
- p = nid_page_nr(i, j) - node_start_pfn(i);
-
- total++;
- if (PageReserved(p))
- reserved++;
- else if (PageSwapCache(p))
- cached++;
- else if (!page_count(p))
- free++;
- else
- shared += page_count(p) - 1;
- pgdat_resize_unlock(NODE_DATA(i), &flags);
- }
+ 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);
}
-#endif
+
printk(KERN_INFO "%d pages of RAM\n", total);
printk(KERN_INFO "%d reserved pages\n", reserved);
- printk(KERN_INFO "%d pages shared\n", shared);
- printk(KERN_INFO "%d pages swap cached\n", cached);
-
#ifdef CONFIG_DISCONTIGMEM
{