diff options
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/memory.c b/mm/memory.c index 17751b386f7..dc955dad52a 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -58,6 +58,7 @@ #include <linux/elf.h> #include <linux/gfp.h> #include <trace/swap.h> +#include <trace/fault.h> #include <asm/io.h> #include <asm/pgalloc.h> @@ -69,6 +70,8 @@ #include "internal.h" DEFINE_TRACE(swap_in); +DEFINE_TRACE(page_fault_get_user_entry); +DEFINE_TRACE(page_fault_get_user_exit); #ifndef CONFIG_NEED_MULTIPLE_NODES /* use the per-pgdat data instead for discontigmem - mbligh */ @@ -1519,6 +1522,8 @@ int __get_user_pages(struct task_struct *tsk, struct mm_struct *mm, int ret; unsigned int fault_flags = 0; + trace_page_fault_get_user_entry(mm, + vma, start, foll_flags & FOLL_WRITE); if (foll_flags & FOLL_WRITE) fault_flags |= FAULT_FLAG_WRITE; if (nonblocking) @@ -1526,6 +1531,7 @@ int __get_user_pages(struct task_struct *tsk, struct mm_struct *mm, ret = handle_mm_fault(mm, vma, start, fault_flags); + trace_page_fault_get_user_exit(ret); if (ret & VM_FAULT_ERROR) { if (ret & VM_FAULT_OOM) |