thp: transparent hugepage vmstat
Add hugepage stat information to /proc/vmstat and /proc/meminfo. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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5 changed files with 34 additions and 5 deletions
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@ -100,6 +100,9 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
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"VmallocChunk: %8lu kB\n"
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#ifdef CONFIG_MEMORY_FAILURE
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"HardwareCorrupted: %5lu kB\n"
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#endif
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#ifdef CONFIG_TRANSPARENT_HUGEPAGE
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"AnonHugePages: %8lu kB\n"
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#endif
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,
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K(i.totalram),
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@ -128,7 +131,12 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
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K(i.freeswap),
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K(global_page_state(NR_FILE_DIRTY)),
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K(global_page_state(NR_WRITEBACK)),
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K(global_page_state(NR_ANON_PAGES)),
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K(global_page_state(NR_ANON_PAGES)
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#ifdef CONFIG_TRANSPARENT_HUGEPAGE
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+ global_page_state(NR_ANON_TRANSPARENT_HUGEPAGES) *
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HPAGE_PMD_NR
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#endif
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),
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K(global_page_state(NR_FILE_MAPPED)),
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K(global_page_state(NR_SHMEM)),
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K(global_page_state(NR_SLAB_RECLAIMABLE) +
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@ -150,6 +158,10 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
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vmi.largest_chunk >> 10
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#ifdef CONFIG_MEMORY_FAILURE
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,atomic_long_read(&mce_bad_pages) << (PAGE_SHIFT - 10)
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#endif
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#ifdef CONFIG_TRANSPARENT_HUGEPAGE
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,K(global_page_state(NR_ANON_TRANSPARENT_HUGEPAGES) *
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HPAGE_PMD_NR)
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#endif
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);
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@ -114,6 +114,7 @@ enum zone_stat_item {
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NUMA_LOCAL, /* allocation from local node */
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NUMA_OTHER, /* allocation from other node */
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#endif
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NR_ANON_TRANSPARENT_HUGEPAGES,
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NR_VM_ZONE_STAT_ITEMS };
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/*
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@ -751,6 +751,9 @@ static void __split_huge_page_refcount(struct page *page)
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lru_add_page_tail(zone, page, page_tail);
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}
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__dec_zone_page_state(page, NR_ANON_TRANSPARENT_HUGEPAGES);
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__mod_zone_page_state(zone, NR_ANON_PAGES, HPAGE_PMD_NR);
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ClearPageCompound(page);
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compound_unlock(page);
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spin_unlock_irq(&zone->lru_lock);
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20
mm/rmap.c
20
mm/rmap.c
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@ -882,8 +882,13 @@ void do_page_add_anon_rmap(struct page *page,
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struct vm_area_struct *vma, unsigned long address, int exclusive)
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{
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int first = atomic_inc_and_test(&page->_mapcount);
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if (first)
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__inc_zone_page_state(page, NR_ANON_PAGES);
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if (first) {
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if (!PageTransHuge(page))
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__inc_zone_page_state(page, NR_ANON_PAGES);
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else
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__inc_zone_page_state(page,
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NR_ANON_TRANSPARENT_HUGEPAGES);
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}
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if (unlikely(PageKsm(page)))
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return;
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@ -911,7 +916,10 @@ void page_add_new_anon_rmap(struct page *page,
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VM_BUG_ON(address < vma->vm_start || address >= vma->vm_end);
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SetPageSwapBacked(page);
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atomic_set(&page->_mapcount, 0); /* increment count (starts at -1) */
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__inc_zone_page_state(page, NR_ANON_PAGES);
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if (!PageTransHuge(page))
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__inc_zone_page_state(page, NR_ANON_PAGES);
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else
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__inc_zone_page_state(page, NR_ANON_TRANSPARENT_HUGEPAGES);
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__page_set_anon_rmap(page, vma, address, 1);
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if (page_evictable(page, vma))
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lru_cache_add_lru(page, LRU_ACTIVE_ANON);
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@ -964,7 +972,11 @@ void page_remove_rmap(struct page *page)
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return;
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if (PageAnon(page)) {
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mem_cgroup_uncharge_page(page);
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__dec_zone_page_state(page, NR_ANON_PAGES);
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if (!PageTransHuge(page))
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__dec_zone_page_state(page, NR_ANON_PAGES);
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else
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__dec_zone_page_state(page,
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NR_ANON_TRANSPARENT_HUGEPAGES);
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} else {
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__dec_zone_page_state(page, NR_FILE_MAPPED);
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mem_cgroup_update_file_mapped(page, -1);
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@ -880,6 +880,7 @@ static const char * const vmstat_text[] = {
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"numa_local",
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"numa_other",
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#endif
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"nr_anon_transparent_hugepages",
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"nr_dirty_threshold",
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"nr_dirty_background_threshold",
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