linux-kernel - Re: [PATCH v5 5/7] s390: mm/gup: add gup trace points

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Message-ID: <56969389.9060703@linaro.org>
Date:	Wed, 13 Jan 2016 10:12:25 -0800
From:	"Shi, Yang" <yang.shi@...aro.org>
To:	akpm@...ux-foundation.org, rostedt@...dmis.org, mingo@...hat.com
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linaro-kernel@...ts.linaro.org,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	linux-s390@...r.kernel.org
Subject: Re: [PATCH v5 5/7] s390: mm/gup: add gup trace points

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@...ibm.com>
> Cc: Heiko Carstens <heiko.carstens@...ibm.com>
> Cc: linux-s390@...r.kernel.org
> Signed-off-by: Yang Shi <yang.shi@...aro.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.
>