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

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  [PATCH 3/7] x86: mm/gup: add gup trace points Yang Shi <yang.shi@linaro.org> - 2015-12-02 00:30 +0100

#1281330 — [PATCH 3/7] x86: mm/gup: add gup trace points

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(+)

diff --git a/arch/x86/mm/gup.c b/arch/x86/mm/gup.c
index ae9a37b..ed6cca9 100644
--- a/arch/x86/mm/gup.c
+++ b/arch/x86/mm/gup.c
@@ -10,6 +10,9 @@
 #include <linux/highmem.h>
 #include <linux/swap.h>
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/gup.h>>
+
 #include <asm/pgtable.h>
 
 static inline pte_t gup_get_pte(pte_t *ptep)
@@ -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, nr_pages, write, pages);
+
 	/*
 	 * XXX: batch / limit 'nr', to avoid large irq off latency
 	 * needs some instrumenting to determine the common sizes used by
@@ -342,6 +347,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write,
 		goto slow_irqon;
 #endif
 
+	trace_gup_get_user_pages_fast(start, nr_pages, write, pages);
+
 	/*
 	 * XXX: batch / limit 'nr', to avoid large irq off latency
 	 * needs some instrumenting to determine the common sizes used by
-- 
2.0.2

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