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mm, rmap: account shmem thp pages

Bläddra i källkod 
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>
This commit is contained in:
Kirill A. Shutemov
2016-07-26 15:26:10 -07:00
committad av Linus Torvalds
förälder fc127da085
incheckning 65c453778a
8 ändrade filer med 58 tillägg och 15 borttagningar
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4
mm/huge_memory.c
Visa fil

@@ -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;

19
mm/page_alloc.c
Visa fil

@@ -4312,6 +4312,9 @@ void show_free_areas(unsigned int filter)
" unevictable:%lu dirty:%lu writeback:%lu unstable:%lu\n"
" slab_reclaimable:%lu slab_unreclaimable:%lu\n"
" mapped:%lu shmem:%lu pagetables:%lu bounce:%lu\n"
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
" anon_thp: %lu shmem_thp: %lu shmem_pmdmapped: %lu\n"
#endif
" free:%lu free_pcp:%lu free_cma:%lu\n",
global_page_state(NR_ACTIVE_ANON),
global_page_state(NR_INACTIVE_ANON),
@@ -4329,6 +4332,11 @@ void show_free_areas(unsigned int filter)
global_page_state(NR_SHMEM),
global_page_state(NR_PAGETABLE),
global_page_state(NR_BOUNCE),
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
global_page_state(NR_ANON_THPS) * HPAGE_PMD_NR,
global_page_state(NR_SHMEM_THPS) * HPAGE_PMD_NR,
global_page_state(NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR,
#endif
global_page_state(NR_FREE_PAGES),
free_pcp,
global_page_state(NR_FREE_CMA_PAGES));
@@ -4363,6 +4371,11 @@ void show_free_areas(unsigned int filter)
" writeback:%lukB"
" mapped:%lukB"
" shmem:%lukB"
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
" shmem_thp: %lukB"
" shmem_pmdmapped: %lukB"
" anon_thp: %lukB"
#endif
" slab_reclaimable:%lukB"
" slab_unreclaimable:%lukB"
" kernel_stack:%lukB"
@@ -4395,6 +4408,12 @@ void show_free_areas(unsigned int filter)
K(zone_page_state(zone, NR_WRITEBACK)),
K(zone_page_state(zone, NR_FILE_MAPPED)),
K(zone_page_state(zone, NR_SHMEM)),
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
K(zone_page_state(zone, NR_SHMEM_THPS) * HPAGE_PMD_NR),
K(zone_page_state(zone, NR_SHMEM_PMDMAPPED)
* HPAGE_PMD_NR),
K(zone_page_state(zone, NR_ANON_THPS) * HPAGE_PMD_NR),
#endif
K(zone_page_state(zone, NR_SLAB_RECLAIMABLE)),
K(zone_page_state(zone, NR_SLAB_UNRECLAIMABLE)),
zone_page_state(zone, NR_KERNEL_STACK) *

14
mm/rmap.c
Visa fil

@@ -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)) {
/*

2
mm/vmstat.c
Visa fil

@@ -733,6 +733,8 @@ const char * const vmstat_text[] = {
"workingset_activate",
"workingset_nodereclaim",
"nr_anon_transparent_hugepages",
"nr_shmem_hugepages",
"nr_shmem_pmdmapped",
"nr_free_cma",
/* enum writeback_stat_item counters */