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| author | Jerome Marchand <jmarchan@redhat.com> | 2013-11-12 15:08:31 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-13 12:09:11 +0900 |
| commit | 00619bcc44d6b779aa366130b354153c222e4380 (patch) | |
| tree | 5a885f81a351dfc6ca471823388d89a739406862 /mm/util.c | |
| parent | 715ea41e60277f28f84d6c937737350e00955d56 (diff) | |
| download | kernel-common-00619bcc44d6b779aa366130b354153c222e4380.tar.gz kernel-common-00619bcc44d6b779aa366130b354153c222e4380.tar.bz2 kernel-common-00619bcc44d6b779aa366130b354153c222e4380.zip | |
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.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/mm/util.c b/mm/util.c index eaf63fc2c92f..f7bc2096071c 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); |