diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2016-07-26 15:26:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-26 16:19:19 -0700 |
| commit | 65c453778aea374a46597f4d9826274d1eaf7338 (patch) | |
| tree | 4210852e253bcea95da5b2973d7be93a535ee3a1 /mm/rmap.c | |
| parent | fc127da085c26beb89f83ad804cf73422c3b6855 (diff) | |
| download | lwn-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/rmap.c')
| -rw-r--r-- | mm/rmap.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index 9d643b7a99ce..8a13d9f7b566 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -1212,10 +1212,8 @@ void do_page_add_anon_rmap(struct page *page, * pte lock(a spinlock) is held, which implies preemption * disabled. */ - if (compound) { - __inc_zone_page_state(page, - NR_ANON_TRANSPARENT_HUGEPAGES); - } + if (compound) + __inc_zone_page_state(page, NR_ANON_THPS); __mod_zone_page_state(page_zone(page), NR_ANON_PAGES, nr); } if (unlikely(PageKsm(page))) @@ -1253,7 +1251,7 @@ void page_add_new_anon_rmap(struct page *page, VM_BUG_ON_PAGE(!PageTransHuge(page), page); /* increment count (starts at -1) */ atomic_set(compound_mapcount_ptr(page), 0); - __inc_zone_page_state(page, NR_ANON_TRANSPARENT_HUGEPAGES); + __inc_zone_page_state(page, NR_ANON_THPS); } else { /* Anon THP always mapped first with PMD */ VM_BUG_ON_PAGE(PageTransCompound(page), page); @@ -1283,6 +1281,8 @@ void page_add_file_rmap(struct page *page, bool compound) } if (!atomic_inc_and_test(compound_mapcount_ptr(page))) goto out; + VM_BUG_ON_PAGE(!PageSwapBacked(page), page); + __inc_zone_page_state(page, NR_SHMEM_PMDMAPPED); } else { if (PageTransCompound(page)) { VM_BUG_ON_PAGE(!PageLocked(page), page); @@ -1321,6 +1321,8 @@ static void page_remove_file_rmap(struct page *page, bool compound) } if (!atomic_add_negative(-1, compound_mapcount_ptr(page))) goto out; + VM_BUG_ON_PAGE(!PageSwapBacked(page), page); + __dec_zone_page_state(page, NR_SHMEM_PMDMAPPED); } else { if (!atomic_add_negative(-1, &page->_mapcount)) goto out; @@ -1354,7 +1356,7 @@ static void page_remove_anon_compound_rmap(struct page *page) if (!IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE)) return; - __dec_zone_page_state(page, NR_ANON_TRANSPARENT_HUGEPAGES); + __dec_zone_page_state(page, NR_ANON_THPS); if (TestClearPageDoubleMap(page)) { /* |