[v5,5/7] s390: mm/gup: add gup trace points

Message ID 1449696151-4195-6-git-send-email-yang.shi@linaro.org
State New
Headers show

Commit Message

Yang Shi Dec. 9, 2015, 9:22 p.m.
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux-s390@vger.kernel.org
Signed-off-by: Yang Shi <yang.shi@linaro.org>

---
 arch/s390/mm/gup.c | 5 +++++
 1 file changed, 5 insertions(+)

-- 
2.0.2

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Comments

Yang Shi Jan. 13, 2016, 6:12 p.m. | #1
Hi folks,

Any comment for this one? The tracing part review has been done.

Thanks,
Yang


On 12/9/2015 1:22 PM, Yang Shi wrote:
> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>

> Cc: Heiko Carstens <heiko.carstens@de.ibm.com>

> Cc: linux-s390@vger.kernel.org

> Signed-off-by: Yang Shi <yang.shi@linaro.org>

> ---

>   arch/s390/mm/gup.c | 5 +++++

>   1 file changed, 5 insertions(+)

>

> diff --git a/arch/s390/mm/gup.c b/arch/s390/mm/gup.c

> index 12bbf0e..a1d5db7 100644

> --- a/arch/s390/mm/gup.c

> +++ b/arch/s390/mm/gup.c

> @@ -12,6 +12,8 @@

>   #include <linux/rwsem.h>

>   #include <asm/pgtable.h>

>

> +#include <trace/events/gup.h>

> +

>   /*

>    * The performance critical leaf functions are made noinline otherwise gcc

>    * inlines everything into a single function which results in too much

> @@ -188,6 +190,9 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write,

>   	end = start + len;

>   	if ((end <= start) || (end > TASK_SIZE))

>   		return 0;

> +

> +	trace_gup_get_user_pages_fast(start, nr_pages);

> +

>   	/*

>   	 * local_irq_save() doesn't prevent pagetable teardown, but does

>   	 * prevent the pagetables from being freed on s390.

>

Patch

diff --git a/arch/s390/mm/gup.c b/arch/s390/mm/gup.c
index 12bbf0e..a1d5db7 100644
--- a/arch/s390/mm/gup.c
+++ b/arch/s390/mm/gup.c
@@ -12,6 +12,8 @@ 
 #include <linux/rwsem.h>
 #include <asm/pgtable.h>
 
+#include <trace/events/gup.h>
+
 /*
  * The performance critical leaf functions are made noinline otherwise gcc
  * inlines everything into a single function which results in too much
@@ -188,6 +190,9 @@  int __get_user_pages_fast(unsigned long start, int nr_pages, int write,
 	end = start + len;
 	if ((end <= start) || (end > TASK_SIZE))
 		return 0;
+
+	trace_gup_get_user_pages_fast(start, nr_pages);
+
 	/*
 	 * local_irq_save() doesn't prevent pagetable teardown, but does
 	 * prevent the pagetables from being freed on s390.