[PATCH] thp, vmstat: implement HZP_ALLOC and HZP_ALLOC_FAILED events

From: "Kirill A. Shutemov" HZP_ALLOC event triggers on every huge zero page allocation, including allocations which where dropped due race with other allocation. HZP_ALLOC_FAILED event triggers on huge zero page allocation fail (ENOMEM). Signed-off-by: Kirill A. Shutemov ---

[PATCH] thp, vmstat: implement HZP_ALLOC and HZP_ALLOC_FAILED events

From: Kirill A. Shutemov kirill.shute...@linux.intel.com HZP_ALLOC event triggers on every huge zero page allocation, including allocations which where dropped due race with other allocation. HZP_ALLOC_FAILED event triggers on huge zero page allocation fail (ENOMEM). Signed-off-by: Kirill A.