linux-kernel - Re: [PATCH tip/core/rcu 10/86] rcu: eliminate unused boosting statistics

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Message-ID: <20110501155317.GG14829@feather>
Date:	Sun, 1 May 2011 08:53:18 -0700
From:	Josh Triplett <josh@...htriplett.org>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu, laijs@...fujitsu.com,
	dipankar@...ibm.com, akpm@...ux-foundation.org,
	mathieu.desnoyers@...ymtl.ca, niv@...ibm.com, tglx@...utronix.de,
	peterz@...radead.org, rostedt@...dmis.org, Valdis.Kletnieks@...edu,
	dhowells@...hat.com, eric.dumazet@...il.com, darren@...art.com,
	patches@...aro.org, "Paul E. McKenney" <paul.mckenney@...aro.org>
Subject: Re: [PATCH tip/core/rcu 10/86] rcu: eliminate unused boosting
 statistics

On Sun, May 01, 2011 at 06:20:50AM -0700, Paul E. McKenney wrote:
> From: Paul E. McKenney <paul.mckenney@...aro.org>
> 
> The n_rcu_torture_boost_allocerror and n_rcu_torture_boost_afferror
> statistics are not actually incremented anymore, so eliminate them.
> 
> Signed-off-by: Paul E. McKenney <paul.mckenney@...aro.org>
> Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
> ---
>  kernel/rcutorture.c |    4 +---
>  1 files changed, 1 insertions(+), 3 deletions(-)
> 
> diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
> index 4d256db..62ec8ee6 100644
> --- a/kernel/rcutorture.c
> +++ b/kernel/rcutorture.c
> @@ -1067,7 +1067,7 @@ rcu_torture_printk(char *page)
>  	cnt += sprintf(&page[cnt], "%s%s ", torture_type, TORTURE_FLAG);
>  	cnt += sprintf(&page[cnt],
>  		       "rtc: %p ver: %ld tfle: %d rta: %d rtaf: %d rtf: %d "
> -		       "rtmbe: %d rtbke: %ld rtbre: %ld rtbae: %ld rtbafe: %ld "
> +		       "rtmbe: %d rtbke: %ld rtbre: %ld "
>  		       "rtbf: %ld rtb: %ld nt: %ld",
>  		       rcu_torture_current,
>  		       rcu_torture_current_version,
> @@ -1078,8 +1078,6 @@ rcu_torture_printk(char *page)
>  		       atomic_read(&n_rcu_torture_mberror),
>  		       n_rcu_torture_boost_ktrerror,
>  		       n_rcu_torture_boost_rterror,
> -		       n_rcu_torture_boost_allocerror,
> -		       n_rcu_torture_boost_afferror,
>  		       n_rcu_torture_boost_failure,
>  		       n_rcu_torture_boosts,
>  		       n_rcu_torture_timers);

Shouldn't you eliminate the variables entirely, if they no longer track
anything?

- Josh Triplett
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