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Commit ce9311cf authored by Yisheng Xie's avatar Yisheng Xie Committed by Linus Torvalds
Browse files

mm/vmstats: add thp_split_pud event for clarity 

We added support for PUD-sized transparent hugepages, however we count
the event "thp split pud" into thp_split_pmd event.

To separate the event count of thp split pud from pmd, add a new event
named thp_split_pud.

Link: http://lkml.kernel.org/r/1488282380-5076-1-git-send-email-xieyisheng1@huawei.com


Signed-off-by: default avatarYisheng Xie <xieyisheng1@huawei.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Ebru Akagunduz <ebru.akagunduz@gmail.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent cbfd0c10

include/linux/vm_event_item.h

+3 −0
Original line number Diff line number Diff line
@@ -79,6 +79,9 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, 
		THP_SPLIT_PAGE_FAILED,

		THP_DEFERRED_SPLIT_PAGE,

		THP_SPLIT_PMD,

#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD

		THP_SPLIT_PUD,

#endif

		THP_ZERO_PAGE_ALLOC,

		THP_ZERO_PAGE_ALLOC_FAILED,

#endif

mm/huge_memory.c

+1 −1
Original line number Diff line number Diff line
@@ -1828,7 +1828,7 @@ static void __split_huge_pud_locked(struct vm_area_struct *vma, pud_t *pud, 
	VM_BUG_ON_VMA(vma->vm_end < haddr + HPAGE_PUD_SIZE, vma);

	VM_BUG_ON(!pud_trans_huge(*pud) && !pud_devmap(*pud));



	count_vm_event(THP_SPLIT_PMD);

	count_vm_event(THP_SPLIT_PUD);



	pudp_huge_clear_flush_notify(vma, haddr, pud);

}

mm/vmstat.c

+3 −0
Original line number Diff line number Diff line
@@ -1065,6 +1065,9 @@ const char * const vmstat_text[] = { 
	"thp_split_page_failed",

	"thp_deferred_split_page",

	"thp_split_pmd",

#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD

	"thp_split_pud",

#endif

	"thp_zero_page_alloc",

	"thp_zero_page_alloc_failed",

#endif