From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Existing stats specify source of thp page: fault or collapse. We're
going allocate a new huge page with write(2). It's nither fault nor
collapse.
Let's introduce new events for that.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
include/linux/vm_event_item.h | 2 ++
mm/vmstat.c | 2 ++
2 files changed, 4 insertions(+)
diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h
index d4b7a18..584c71c 100644
--- a/include/linux/vm_event_item.h
+++ b/include/linux/vm_event_item.h
@@ -71,6 +71,8 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
THP_FAULT_FALLBACK,
THP_COLLAPSE_ALLOC,
THP_COLLAPSE_ALLOC_FAILED,
+ THP_WRITE_ALLOC,
+ THP_WRITE_ALLOC_FAILED,
THP_SPLIT,
THP_ZERO_PAGE_ALLOC,
THP_ZERO_PAGE_ALLOC_FAILED,
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 7945285..df8dcda 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -821,6 +821,8 @@ const char * const vmstat_text[] = {
"thp_fault_fallback",
"thp_collapse_alloc",
"thp_collapse_alloc_failed",
+ "thp_write_alloc",
+ "thp_write_alloc_failed",
"thp_split",
"thp_zero_page_alloc",
"thp_zero_page_alloc_failed",
--
1.7.10.4
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