[PATCHv1, RFC 10/33] mm, rmap: account file thp pages
From: Kirill A. Shutemov <hidden>
Date: 2016-07-26 00:35:12
Also in:
linux-block, linux-fsdevel, linux-mm, lkml
Subsystem:
driver core, kobjects, debugfs and sysfs, filesystems (vfs and infrastructure), memory management, memory management - core, memory management - mglru (multi-gen lru), memory management - page allocator, memory management - rmap (reverse mapping), memory management - thp (transparent huge page), memory mapping, page cache, proc filesystem, the rest · Maintainers:
Greg Kroah-Hartman, "Rafael J. Wysocki", Danilo Krummrich, Alexander Viro, Christian Brauner, Andrew Morton, David Hildenbrand, Vlastimil Babka, Lorenzo Stoakes, Liam R. Howlett, Matthew Wilcox, Linus Torvalds
Let's add FileHugePages and FilePmdMapped fields into meminfo and smaps. It indicates how many times we allocate and map file THP. Signed-off-by: Kirill A. Shutemov <redacted> --- drivers/base/node.c | 6 ++++++ fs/proc/meminfo.c | 4 ++++ fs/proc/task_mmu.c | 5 ++++- include/linux/mmzone.h | 2 ++ mm/filemap.c | 3 ++- mm/huge_memory.c | 5 ++++- mm/page_alloc.c | 5 +++++ mm/rmap.c | 12 ++++++++---- mm/vmstat.c | 2 ++ 9 files changed, 37 insertions(+), 7 deletions(-)
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 5548f9686016..45be0ddb84ed 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c@@ -116,6 +116,8 @@ static ssize_t node_read_meminfo(struct device *dev, "Node %d AnonHugePages: %8lu kB\n" "Node %d ShmemHugePages: %8lu kB\n" "Node %d ShmemPmdMapped: %8lu kB\n" + "Node %d FileHugePages: %8lu kB\n" + "Node %d FilePmdMapped: %8lu kB\n" #endif , nid, K(node_page_state(pgdat, NR_FILE_DIRTY)),
@@ -139,6 +141,10 @@ static ssize_t node_read_meminfo(struct device *dev, nid, K(node_page_state(pgdat, NR_SHMEM_THPS) * HPAGE_PMD_NR), nid, K(node_page_state(pgdat, NR_SHMEM_PMDMAPPED) * + HPAGE_PMD_NR), + nid, K(node_page_state(pgdat, NR_FILE_THPS) * + HPAGE_PMD_NR), + nid, K(node_page_state(pgdat, NR_FILE_PMDMAPPED) * HPAGE_PMD_NR)); #else nid, K(sum_zone_node_page_state(nid, NR_SLAB_UNRECLAIMABLE)));
diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
index 09e18fdf61e5..201a060f2c6c 100644
--- a/fs/proc/meminfo.c
+++ b/fs/proc/meminfo.c@@ -107,6 +107,8 @@ static int meminfo_proc_show(struct seq_file *m, void *v) "AnonHugePages: %8lu kB\n" "ShmemHugePages: %8lu kB\n" "ShmemPmdMapped: %8lu kB\n" + "FileHugePages: %8lu kB\n" + "FilePmdMapped: %8lu kB\n" #endif #ifdef CONFIG_CMA "CmaTotal: %8lu kB\n"
@@ -167,6 +169,8 @@ static int meminfo_proc_show(struct seq_file *m, void *v) , K(global_node_page_state(NR_ANON_THPS) * HPAGE_PMD_NR) , K(global_node_page_state(NR_SHMEM_THPS) * HPAGE_PMD_NR) , K(global_node_page_state(NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR) + , K(global_node_page_state(NR_FILE_THPS) * HPAGE_PMD_NR) + , K(global_node_page_state(NR_FILE_PMDMAPPED) * HPAGE_PMD_NR) #endif #ifdef CONFIG_CMA , K(totalcma_pages)
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 187d84ef9de9..de698238a451 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c@@ -449,6 +449,7 @@ struct mem_size_stats { unsigned long anonymous; unsigned long anonymous_thp; unsigned long shmem_thp; + unsigned long file_thp; unsigned long swap; unsigned long shared_hugetlb; unsigned long private_hugetlb;
@@ -582,7 +583,7 @@ static void smaps_pmd_entry(pmd_t *pmd, unsigned long addr, else if (PageSwapBacked(page)) mss->shmem_thp += HPAGE_PMD_SIZE; else - VM_BUG_ON_PAGE(1, page); + mss->file_thp += HPAGE_PMD_SIZE; smaps_account(mss, page, true, pmd_young(*pmd), pmd_dirty(*pmd)); } #else
@@ -777,6 +778,7 @@ static int show_smap(struct seq_file *m, void *v, int is_pid) "Anonymous: %8lu kB\n" "AnonHugePages: %8lu kB\n" "ShmemPmdMapped: %8lu kB\n" + "FilePmdMapped: %8lu kB\n" "Shared_Hugetlb: %8lu kB\n" "Private_Hugetlb: %7lu kB\n" "Swap: %8lu kB\n"
@@ -795,6 +797,7 @@ static int show_smap(struct seq_file *m, void *v, int is_pid) mss.anonymous >> 10, mss.anonymous_thp >> 10, mss.shmem_thp >> 10, + mss.file_thp >> 10, mss.shared_hugetlb >> 10, mss.private_hugetlb >> 10, mss.swap >> 10,
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index e6aca07cedb7..cb2011ee5fc7 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h@@ -154,6 +154,8 @@ enum node_stat_item { NR_SHMEM, /* shmem pages (included tmpfs/GEM pages) */ NR_SHMEM_THPS, NR_SHMEM_PMDMAPPED, + NR_FILE_THPS, + NR_FILE_PMDMAPPED, NR_ANON_THPS, NR_UNSTABLE_NFS, /* NFS unstable pages */ NR_VMSCAN_WRITE,
diff --git a/mm/filemap.c b/mm/filemap.c
index 6d545e5b9cec..7daedd910cf4 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c@@ -220,7 +220,8 @@ void __delete_from_page_cache(struct page *page, void *shadow) if (PageTransHuge(page)) __dec_node_page_state(page, NR_SHMEM_THPS); } else { - VM_BUG_ON_PAGE(PageTransHuge(page) && !PageHuge(page), page); + if (PageTransHuge(page) && !PageHuge(page)) + __dec_node_page_state(page, NR_FILE_THPS); } /*
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 383f360e5fff..c1444a99a583 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c@@ -1830,7 +1830,10 @@ static void __split_huge_page(struct page *page, struct list_head *list, struct radix_tree_iter iter; void **slot; - __dec_node_page_state(head, NR_SHMEM_THPS); + if (PageSwapBacked(page)) + __dec_node_page_state(page, NR_SHMEM_THPS); + else + __dec_node_page_state(page, NR_FILE_THPS); radix_tree_split(&mapping->page_tree, head->index, 0); radix_tree_for_each_slot(slot, &mapping->page_tree, &iter,
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 830ad49a584a..f09f5832acc7 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c@@ -4341,6 +4341,8 @@ void show_free_areas(unsigned int filter) #ifdef CONFIG_TRANSPARENT_HUGEPAGE " shmem_thp: %lukB" " shmem_pmdmapped: %lukB" + " file_thp: %lukB" + " file_pmdmapped: %lukB" " anon_thp: %lukB" #endif " writeback_tmp:%lukB"
@@ -4363,6 +4365,9 @@ void show_free_areas(unsigned int filter) K(node_page_state(pgdat, NR_SHMEM_THPS) * HPAGE_PMD_NR), K(node_page_state(pgdat, NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR), + K(node_page_state(pgdat, NR_FILE_THPS) * HPAGE_PMD_NR), + K(node_page_state(pgdat, NR_FILE_PMDMAPPED) + * HPAGE_PMD_NR), K(node_page_state(pgdat, NR_ANON_THPS) * HPAGE_PMD_NR), #endif K(node_page_state(pgdat, NR_SHMEM)),
diff --git a/mm/rmap.c b/mm/rmap.c
index 709bc83703b1..eee844997bd8 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c@@ -1281,8 +1281,10 @@ 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_node_page_state(page, NR_SHMEM_PMDMAPPED); + if (PageSwapBacked(page)) + __inc_node_page_state(page, NR_SHMEM_PMDMAPPED); + else + __inc_node_page_state(page, NR_FILE_PMDMAPPED); } else { if (PageTransCompound(page)) { VM_BUG_ON_PAGE(!PageLocked(page), page);
@@ -1321,8 +1323,10 @@ 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_node_page_state(page, NR_SHMEM_PMDMAPPED); + if (PageSwapBacked(page)) + __dec_node_page_state(page, NR_SHMEM_PMDMAPPED); + else + __dec_node_page_state(page, NR_FILE_PMDMAPPED); } else { if (!atomic_add_negative(-1, &page->_mapcount)) goto out;
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 91ecca96dcae..fcf899e25f49 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c@@ -961,6 +961,8 @@ const char * const vmstat_text[] = { "nr_shmem", "nr_shmem_hugepages", "nr_shmem_pmdmapped", + "nr_file_hugepaged", + "nr_file_pmdmapped", "nr_anon_transparent_hugepages", "nr_unstable", "nr_vmscan_write",
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2.8.1
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