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-rw-r--r--mm/huge_memory.c25
1 files changed, 21 insertions, 4 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 0a619e0..1722683 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -680,8 +680,11 @@ int do_huge_pmd_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma,
return VM_FAULT_OOM;
page = alloc_hugepage_vma(transparent_hugepage_defrag(vma),
vma, haddr, numa_node_id(), 0);
- if (unlikely(!page))
+ if (unlikely(!page)) {
+ count_vm_event(THP_FAULT_FALLBACK);
goto out;
+ }
+ count_vm_event(THP_FAULT_ALLOC);
if (unlikely(mem_cgroup_newpage_charge(page, mm, GFP_KERNEL))) {
put_page(page);
goto out;
@@ -909,11 +912,13 @@ int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
new_page = NULL;
if (unlikely(!new_page)) {
+ count_vm_event(THP_FAULT_FALLBACK);
ret = do_huge_pmd_wp_page_fallback(mm, vma, address,
pmd, orig_pmd, page, haddr);
put_page(page);
goto out;
}
+ count_vm_event(THP_FAULT_ALLOC);
if (unlikely(mem_cgroup_newpage_charge(new_page, mm, GFP_KERNEL))) {
put_page(new_page);
@@ -1390,6 +1395,7 @@ int split_huge_page(struct page *page)
BUG_ON(!PageSwapBacked(page));
__split_huge_page(page, anon_vma);
+ count_vm_event(THP_SPLIT);
BUG_ON(PageCompound(page));
out_unlock:
@@ -1784,9 +1790,11 @@ static void collapse_huge_page(struct mm_struct *mm,
node, __GFP_OTHER_NODE);
if (unlikely(!new_page)) {
up_read(&mm->mmap_sem);
+ count_vm_event(THP_COLLAPSE_ALLOC_FAILED);
*hpage = ERR_PTR(-ENOMEM);
return;
}
+ count_vm_event(THP_COLLAPSE_ALLOC);
if (unlikely(mem_cgroup_newpage_charge(new_page, mm, GFP_KERNEL))) {
up_read(&mm->mmap_sem);
put_page(new_page);
@@ -2151,8 +2159,11 @@ static void khugepaged_do_scan(struct page **hpage)
#ifndef CONFIG_NUMA
if (!*hpage) {
*hpage = alloc_hugepage(khugepaged_defrag());
- if (unlikely(!*hpage))
+ if (unlikely(!*hpage)) {
+ count_vm_event(THP_COLLAPSE_ALLOC_FAILED);
break;
+ }
+ count_vm_event(THP_COLLAPSE_ALLOC);
}
#else
if (IS_ERR(*hpage))
@@ -2192,8 +2203,11 @@ static struct page *khugepaged_alloc_hugepage(void)
do {
hpage = alloc_hugepage(khugepaged_defrag());
- if (!hpage)
+ if (!hpage) {
+ count_vm_event(THP_COLLAPSE_ALLOC_FAILED);
khugepaged_alloc_sleep();
+ } else
+ count_vm_event(THP_COLLAPSE_ALLOC);
} while (unlikely(!hpage) &&
likely(khugepaged_enabled()));
return hpage;
@@ -2210,8 +2224,11 @@ static void khugepaged_loop(void)
while (likely(khugepaged_enabled())) {
#ifndef CONFIG_NUMA
hpage = khugepaged_alloc_hugepage();
- if (unlikely(!hpage))
+ if (unlikely(!hpage)) {
+ count_vm_event(THP_COLLAPSE_ALLOC_FAILED);
break;
+ }
+ count_vm_event(THP_COLLAPSE_ALLOC);
#else
if (IS_ERR(hpage)) {
khugepaged_alloc_sleep();
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