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

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Message-ID: <20160114074500.GA4073@osiris>
Date:	Thu, 14 Jan 2016 08:45:00 +0100
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	"Shi, Yang" <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,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	linux-s390@...r.kernel.org
Subject: Re: [PATCH v5 5/7] s390: mm/gup: add gup trace points

On Wed, Jan 13, 2016 at 10:12:25AM -0800, Shi, Yang wrote:
> Hi folks,
> 
> Any comment for this one? The tracing part review has been done.
> 
> Thanks,
> Yang

If the rest of this series has been acked by the appropriate maintainers
please feel free to add an

Acked-by: Heiko Carstens <heiko.carstens@...ibm.com>

for this specific patch.

> 
> 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.
> >
>