linux-kernel - Re: [PATCH 4/7] mips: mm/gup: add gup trace points

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Date:	Wed, 2 Dec 2015 14:23:20 +0100
From:	Ralf Baechle <ralf@...ux-mips.org>
To:	Yang Shi <yang.shi@...aro.org>
Cc:	akpm@...ux-foundation.org, rostedt@...dmis.org, mingo@...hat.com,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linaro-kernel@...ts.linaro.org, linux-mips@...ux-mips.org
Subject: Re: [PATCH 4/7] mips: mm/gup: add gup trace points

On Tue, Dec 01, 2015 at 03:06:14PM -0800, Yang Shi wrote:

>  arch/mips/mm/gup.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/arch/mips/mm/gup.c b/arch/mips/mm/gup.c
> index 349995d..3c5b8c8 100644
> --- a/arch/mips/mm/gup.c
> +++ b/arch/mips/mm/gup.c
> @@ -12,6 +12,9 @@
>  #include <linux/swap.h>
>  #include <linux/hugetlb.h>
>  
> +#define CREATE_TRACE_POINTS
> +#include <trace/events/gup.h>
> +
>  #include <asm/cpu-features.h>
>  #include <asm/pgtable.h>
>  
> @@ -211,6 +214,8 @@ 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
> @@ -277,6 +282,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write,
>  	if (end < start || cpu_has_dc_aliases)
>  		goto slow_irqon;
>  
> +	trace_gup_get_user_pages_fast(start, nr_pages, write, pages);
> +
>  	/* XXX: batch / limit 'nr' */
>  	local_irq_disable();
>  	pgdp = pgd_offset(mm, addr);

Acked-by: Ralf Baechle <ralf@...ux-mips.org>

Please feel free to merge this upstream with the remainder of the
series once it's been acked.

  Ralf
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