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authorJerome Marchand <jmarchan@redhat.com>2013-11-12 15:08:31 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-11-13 12:09:11 +0900
commit00619bcc44d6b779aa366130b354153c222e4380 (patch)
tree5a885f81a351dfc6ca471823388d89a739406862 /mm/util.c
parent715ea41e60277f28f84d6c937737350e00955d56 (diff)
mm: factor commit limit calculation
The same calculation is currently done in three differents places. Factor that code so future changes has to be made at only one place. [akpm@linux-foundation.org: uninline vm_commit_limit()] Signed-off-by: Jerome Marchand <jmarchan@redhat.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Michal Hocko <mhocko@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/util.c')
-rw-r--r--mm/util.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/mm/util.c b/mm/util.c
index eaf63fc2c92..f7bc2096071 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -7,6 +7,9 @@
#include <linux/security.h>
#include <linux/swap.h>
#include <linux/swapops.h>
+#include <linux/mman.h>
+#include <linux/hugetlb.h>
+
#include <asm/uaccess.h>
#include "internal.h"
@@ -398,6 +401,16 @@ struct address_space *page_mapping(struct page *page)
return mapping;
}
+/*
+ * Committed memory limit enforced when OVERCOMMIT_NEVER policy is used
+ */
+unsigned long vm_commit_limit(void)
+{
+ return ((totalram_pages - hugetlb_total_pages())
+ * sysctl_overcommit_ratio / 100) + total_swap_pages;
+}
+
+
/* Tracepoints definitions. */
EXPORT_TRACEPOINT_SYMBOL(kmalloc);
EXPORT_TRACEPOINT_SYMBOL(kmem_cache_alloc);