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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2016-07-26 15:26:10 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-07-26 16:19:19 -0700
commit65c453778aea374a46597f4d9826274d1eaf7338 (patch)
tree4210852e253bcea95da5b2973d7be93a535ee3a1 /mm/huge_memory.c
parentfc127da085c26beb89f83ad804cf73422c3b6855 (diff)
downloadlwn-65c453778aea374a46597f4d9826274d1eaf7338.tar.gz
lwn-65c453778aea374a46597f4d9826274d1eaf7338.zip
mm, rmap: account shmem thp pages
Let's add ShmemHugePages and ShmemPmdMapped fields into meminfo and smaps. It indicates how many times we allocate and map shmem THP. NR_ANON_TRANSPARENT_HUGEPAGES is renamed to NR_ANON_THPS. Link: http://lkml.kernel.org/r/1466021202-61880-27-git-send-email-kirill.shutemov@linux.intel.com Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/huge_memory.c')
-rw-r--r--mm/huge_memory.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 3b74fea6b5db..6c524984931b 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -3067,7 +3067,7 @@ static void __split_huge_pmd_locked(struct vm_area_struct *vma, pmd_t *pmd,
if (atomic_add_negative(-1, compound_mapcount_ptr(page))) {
/* Last compound_mapcount is gone. */
- __dec_zone_page_state(page, NR_ANON_TRANSPARENT_HUGEPAGES);
+ __dec_zone_page_state(page, NR_ANON_THPS);
if (TestClearPageDoubleMap(page)) {
/* No need in mapcount reference anymore */
for (i = 0; i < HPAGE_PMD_NR; i++)
@@ -3539,6 +3539,8 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
pgdata->split_queue_len--;
list_del(page_deferred_list(head));
}
+ if (mapping)
+ __dec_zone_page_state(page, NR_SHMEM_THPS);
spin_unlock(&pgdata->split_queue_lock);
__split_huge_page(page, list, flags);
ret = 0;