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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/ia64/mm/init.c
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/ia64/mm/init.c')
-rw-r--r--arch/ia64/mm/init.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 88504ab..25c3502 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -684,3 +684,51 @@ per_linux32_init(void)
}
__initcall(per_linux32_init);
+
+/**
+ * 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());
+}
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