diff mbox

[v3,3/7] x86: mm/gup: add gup trace points

Message ID 1449603595-718-4-git-send-email-yang.shi@linaro.org
State Superseded
Headers show

Commit Message

Yang Shi Dec. 8, 2015, 7:39 p.m. UTC 
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Signed-off-by: Yang Shi <yang.shi@linaro.org>

---
 arch/x86/mm/gup.c | 7 +++++++
 1 file changed, 7 insertions(+)

-- 
2.0.2

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diff mbox

Patch

diff --git a/arch/x86/mm/gup.c b/arch/x86/mm/gup.c
index ae9a37b..081f69d 100644
--- a/arch/x86/mm/gup.c
+++ b/arch/x86/mm/gup.c
@@ -12,6 +12,9 @@ 
 
 #include <asm/pgtable.h>
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/gup.h>>
+
 static inline pte_t gup_get_pte(pte_t *ptep)
 {
 #ifndef CONFIG_X86_PAE
@@ -270,6 +273,8 @@  int __get_user_pages_fast(unsigned long start, int nr_pages, int write,
 					(void __user *)start, len)))
 		return 0;
 
+	trace_gup_get_user_pages_fast(start, (unsigned long) nr_pages);
+
 	/*
 	 * XXX: batch / limit 'nr', to avoid large irq off latency
 	 * needs some instrumenting to determine the common sizes used by
@@ -373,6 +378,8 @@  int get_user_pages_fast(unsigned long start, int nr_pages, int write,
 	} while (pgdp++, addr = next, addr != end);
 	local_irq_enable();
 
+	trace_gup_get_user_pages_fast(start, (unsigned long) nr_pages);
+
 	VM_BUG_ON(nr != (end - start) >> PAGE_SHIFT);
 	return nr;