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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: Yisheng 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: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -79,6 +79,9 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
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THP_SPLIT_PAGE_FAILED,
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THP_DEFERRED_SPLIT_PAGE,
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THP_SPLIT_PMD,
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#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
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THP_SPLIT_PUD,
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#endif
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THP_ZERO_PAGE_ALLOC,
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THP_ZERO_PAGE_ALLOC_FAILED,
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#endif
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@ -1828,7 +1828,7 @@ static void __split_huge_pud_locked(struct vm_area_struct *vma, pud_t *pud,
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VM_BUG_ON_VMA(vma->vm_end < haddr + HPAGE_PUD_SIZE, vma);
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VM_BUG_ON(!pud_trans_huge(*pud) && !pud_devmap(*pud));
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count_vm_event(THP_SPLIT_PMD);
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count_vm_event(THP_SPLIT_PUD);
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pudp_huge_clear_flush_notify(vma, haddr, pud);
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}
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@ -1065,6 +1065,9 @@ const char * const vmstat_text[] = {
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"thp_split_page_failed",
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"thp_deferred_split_page",
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"thp_split_pmd",
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#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
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"thp_split_pud",
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#endif
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"thp_zero_page_alloc",
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"thp_zero_page_alloc_failed",
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#endif
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