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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>
hifive-unleashed-5.1
Andrea Arcangeli 2011-01-13 15:46:58 -08:00 committed by Linus Torvalds
parent b9bbfbe30a
commit 79134171df
5 changed files with 34 additions and 5 deletions
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14
fs/proc/meminfo.c
View File

@ -100,6 +100,9 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
"VmallocChunk: %8lu kB\n"
#ifdef CONFIG_MEMORY_FAILURE
"HardwareCorrupted: %5lu kB\n"
#endif
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
"AnonHugePages: %8lu kB\n"
#endif
,
K(i.totalram),
@ -128,7 +131,12 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
K(i.freeswap),
K(global_page_state(NR_FILE_DIRTY)),
K(global_page_state(NR_WRITEBACK)),
K(global_page_state(NR_ANON_PAGES)),
K(global_page_state(NR_ANON_PAGES)
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+ global_page_state(NR_ANON_TRANSPARENT_HUGEPAGES) *
HPAGE_PMD_NR
#endif
),
K(global_page_state(NR_FILE_MAPPED)),
K(global_page_state(NR_SHMEM)),
K(global_page_state(NR_SLAB_RECLAIMABLE) +
@ -150,6 +158,10 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
vmi.largest_chunk >> 10
#ifdef CONFIG_MEMORY_FAILURE
,atomic_long_read(&mce_bad_pages) << (PAGE_SHIFT - 10)
#endif
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
,K(global_page_state(NR_ANON_TRANSPARENT_HUGEPAGES) *
HPAGE_PMD_NR)
#endif
);

1
include/linux/mmzone.h
View File

@ -114,6 +114,7 @@ enum zone_stat_item {
NUMA_LOCAL, /* allocation from local node */
NUMA_OTHER, /* allocation from other node */
#endif
NR_ANON_TRANSPARENT_HUGEPAGES,
NR_VM_ZONE_STAT_ITEMS };
/*

3
mm/huge_memory.c
View File

@ -751,6 +751,9 @@ static void __split_huge_page_refcount(struct page *page)
lru_add_page_tail(zone, page, page_tail);
}
__dec_zone_page_state(page, NR_ANON_TRANSPARENT_HUGEPAGES);
__mod_zone_page_state(zone, NR_ANON_PAGES, HPAGE_PMD_NR);
ClearPageCompound(page);
compound_unlock(page);
spin_unlock_irq(&zone->lru_lock);

20
mm/rmap.c
View File

@ -882,8 +882,13 @@ void do_page_add_anon_rmap(struct page *page,
struct vm_area_struct *vma, unsigned long address, int exclusive)
{
int first = atomic_inc_and_test(&page->_mapcount);
if (first)
__inc_zone_page_state(page, NR_ANON_PAGES);
if (first) {
if (!PageTransHuge(page))
__inc_zone_page_state(page, NR_ANON_PAGES);
else
__inc_zone_page_state(page,
NR_ANON_TRANSPARENT_HUGEPAGES);
}
if (unlikely(PageKsm(page)))
return;
@ -911,7 +916,10 @@ void page_add_new_anon_rmap(struct page *page,
VM_BUG_ON(address < vma->vm_start || address >= vma->vm_end);
SetPageSwapBacked(page);
atomic_set(&page->_mapcount, 0); /* increment count (starts at -1) */
__inc_zone_page_state(page, NR_ANON_PAGES);
if (!PageTransHuge(page))
__inc_zone_page_state(page, NR_ANON_PAGES);
else
__inc_zone_page_state(page, NR_ANON_TRANSPARENT_HUGEPAGES);
__page_set_anon_rmap(page, vma, address, 1);
if (page_evictable(page, vma))
lru_cache_add_lru(page, LRU_ACTIVE_ANON);
@ -964,7 +972,11 @@ void page_remove_rmap(struct page *page)
return;
if (PageAnon(page)) {
mem_cgroup_uncharge_page(page);
__dec_zone_page_state(page, NR_ANON_PAGES);
if (!PageTransHuge(page))
__dec_zone_page_state(page, NR_ANON_PAGES);
else
__dec_zone_page_state(page,
NR_ANON_TRANSPARENT_HUGEPAGES);
} else {
__dec_zone_page_state(page, NR_FILE_MAPPED);
mem_cgroup_update_file_mapped(page, -1);

1
mm/vmstat.c
View File

@ -880,6 +880,7 @@ static const char * const vmstat_text[] = {
"numa_local",
"numa_other",
#endif
"nr_anon_transparent_hugepages",
"nr_dirty_threshold",
"nr_dirty_background_threshold",