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authorAndrea Arcangeli <aarcange@redhat.com>2011-01-13 15:46:58 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-13 17:32:43 -0800
commit79134171df238171daa4c024a42b77b401ccb00b (patch)
treeaf7872d5851e371d09b9fe7eb80f4809713c79fb /mm/rmap.c
parentb9bbfbe30ae088cc88a4b2ba7732baeebd1a0162 (diff)
downloadop-kernel-dev-79134171df238171daa4c024a42b77b401ccb00b.zip
op-kernel-dev-79134171df238171daa4c024a42b77b401ccb00b.tar.gz
thp: transparent hugepage vmstat
Add hugepage stat information to /proc/vmstat and /proc/meminfo. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/rmap.c')
-rw-r--r--mm/rmap.c20
1 files changed, 16 insertions, 4 deletions
diff --git a/mm/rmap.c b/mm/rmap.c
index 92e14dc..3825ae4 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -882,8 +882,13 @@ void do_page_add_anon_rmap(struct page *page,
struct vm_area_struct *vma, unsigned long address, int exclusive)
{
int first = atomic_inc_and_test(&page->_mapcount);
- if (first)
- __inc_zone_page_state(page, NR_ANON_PAGES);
+ if (first) {
+ if (!PageTransHuge(page))
+ __inc_zone_page_state(page, NR_ANON_PAGES);
+ else
+ __inc_zone_page_state(page,
+ NR_ANON_TRANSPARENT_HUGEPAGES);
+ }
if (unlikely(PageKsm(page)))
return;
@@ -911,7 +916,10 @@ void page_add_new_anon_rmap(struct page *page,
VM_BUG_ON(address < vma->vm_start || address >= vma->vm_end);
SetPageSwapBacked(page);
atomic_set(&page->_mapcount, 0); /* increment count (starts at -1) */
- __inc_zone_page_state(page, NR_ANON_PAGES);
+ if (!PageTransHuge(page))
+ __inc_zone_page_state(page, NR_ANON_PAGES);
+ else
+ __inc_zone_page_state(page, NR_ANON_TRANSPARENT_HUGEPAGES);
__page_set_anon_rmap(page, vma, address, 1);
if (page_evictable(page, vma))
lru_cache_add_lru(page, LRU_ACTIVE_ANON);
@@ -964,7 +972,11 @@ void page_remove_rmap(struct page *page)
return;
if (PageAnon(page)) {
mem_cgroup_uncharge_page(page);
- __dec_zone_page_state(page, NR_ANON_PAGES);
+ if (!PageTransHuge(page))
+ __dec_zone_page_state(page, NR_ANON_PAGES);
+ else
+ __dec_zone_page_state(page,
+ NR_ANON_TRANSPARENT_HUGEPAGES);
} else {
__dec_zone_page_state(page, NR_FILE_MAPPED);
mem_cgroup_update_file_mapped(page, -1);
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