Let's add FileHugeMapped field into meminfo. It indicates how many time
we map file THP
NR_ANON_TRANSPARENT_HUGEPAGES is renamed to NR_ANON_THPS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
drivers/base/node.c | 10 ++++++----
fs/proc/meminfo.c | 5 +++--
include/linux/mmzone.h | 3 ++-
mm/huge_memory.c | 2 +-
mm/rmap.c | 12 ++++++------
mm/vmstat.c | 1 +
6 files changed, 19 insertions(+), 14 deletions(-)
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 560751bad294..9cc4e9dad47e 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -113,6 +113,7 @@ static ssize_t node_read_meminfo(struct device *dev,
"Node %d SUnreclaim: %8lu kB\n"
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
"Node %d AnonHugePages: %8lu kB\n"
+ "Node %d FileHugeMapped: %8lu kB\n"
#endif
,
nid, K(node_page_state(nid, NR_FILE_DIRTY)),
@@ -131,10 +132,11 @@ static ssize_t node_read_meminfo(struct device *dev,
node_page_state(nid, NR_SLAB_UNRECLAIMABLE)),
nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE)),
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
- nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE))
- , nid,
- K(node_page_state(nid, NR_ANON_TRANSPARENT_HUGEPAGES) *
- HPAGE_PMD_NR));
+ nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE)),
+ nid, K(node_page_state(nid, NR_ANON_THPS) *
+ HPAGE_PMD_NR),
+ nid, K(node_page_state(nid, NR_FILE_THP_MAPPED) *
+ HPAGE_PMD_NR));
#else
nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE)));
#endif
diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
index 83720460c5bc..50666e987fbd 100644
--- a/fs/proc/meminfo.c
+++ b/fs/proc/meminfo.c
@@ -105,6 +105,7 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
#endif
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
"AnonHugePages: %8lu kB\n"
+ "FileHugeMapped: %8lu kB\n"
#endif
#ifdef CONFIG_CMA
"CmaTotal: %8lu kB\n"
@@ -162,8 +163,8 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
, atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10)
#endif
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
- , K(global_page_state(NR_ANON_TRANSPARENT_HUGEPAGES) *
- HPAGE_PMD_NR)
+ , K(global_page_state(NR_ANON_THPS) * HPAGE_PMD_NR)
+ , K(global_page_state(NR_FILE_THP_MAPPED) * HPAGE_PMD_NR)
#endif
#ifdef CONFIG_CMA
, K(totalcma_pages)
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index c60df9257cc7..85fd4aac53a1 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -158,7 +158,8 @@ enum zone_stat_item {
WORKINGSET_REFAULT,
WORKINGSET_ACTIVATE,
WORKINGSET_NODERECLAIM,
- NR_ANON_TRANSPARENT_HUGEPAGES,
+ NR_ANON_THPS,
+ NR_FILE_THP_MAPPED,
NR_FREE_CMA_PAGES,
NR_VM_ZONE_STAT_ITEMS };
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 2e9e6f4afe40..44468fb7cdbf 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2982,7 +2982,7 @@ 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++)
diff --git a/mm/rmap.c b/mm/rmap.c
index 66808955a5e0..359ec5cff9b0 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1227,10 +1227,8 @@ 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)))
@@ -1268,7 +1266,7 @@ 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);
@@ -1298,6 +1296,7 @@ void page_add_file_rmap(struct page *page, bool compound)
}
if (!atomic_inc_and_test(compound_mapcount_ptr(page)))
goto out;
+ __inc_zone_page_state(page, NR_FILE_THP_MAPPED);
} else {
if (!atomic_inc_and_test(&page->_mapcount))
goto out;
@@ -1330,6 +1329,7 @@ static void page_remove_file_rmap(struct page *page, bool compound)
}
if (!atomic_add_negative(-1, compound_mapcount_ptr(page)))
goto out;
+ __dec_zone_page_state(page, NR_FILE_THP_MAPPED);
} else {
if (!atomic_add_negative(-1, &page->_mapcount))
goto out;
@@ -1363,7 +1363,7 @@ 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)) {
/*
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 74f8c918ac4b..943b37f17007 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -762,6 +762,7 @@ const char * const vmstat_text[] = {
"workingset_activate",
"workingset_nodereclaim",
"nr_anon_transparent_hugepages",
+ "nr_file_transparent_hugepages_mapped",
"nr_free_cma",
/* enum writeback_stat_item counters */
--
2.7.0
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