linux-kernel - Re: [PATCH] blk-throttle: Make total_nr

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Date:	Mon, 13 Jun 2011 13:09:20 -0400
From:	Vivek Goyal <vgoyal@...hat.com>
To:	Joe Perches <joe@...ches.com>
Cc:	Jens Axboe <axboe@...nel.dk>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] blk-throttle: Make total_nr_queued unsigned

On Mon, Jun 13, 2011 at 08:54:48AM -0700, Joe Perches wrote:
> cc: Vivek Goyal <vgoyal@...hat.com>
> 
> The total of two unsigned values should also be unsigned.
> 
> Update throtl_log output to unsigned.
> Update total_nr_queued test to non-zero to be the
> same as the other total_nr_queued tests.
> 
> Signed-off-by: Joe Perches <joe@...ches.com>

Thanks. Looks good to me.

Acked-by: Vivek Goyal <vgoyal@...hat.com>

Vivek

> ---
>  block/blk-throttle.c |    8 ++++----
>  1 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/block/blk-throttle.c b/block/blk-throttle.c
> index 3689f83..f6a7941 100644
> --- a/block/blk-throttle.c
> +++ b/block/blk-throttle.c
> @@ -142,9 +142,9 @@ static inline struct throtl_grp *tg_of_blkg(struct blkio_group *blkg)
>  	return NULL;
>  }
>  
> -static inline int total_nr_queued(struct throtl_data *td)
> +static inline unsigned int total_nr_queued(struct throtl_data *td)
>  {
> -	return (td->nr_queued[0] + td->nr_queued[1]);
> +	return td->nr_queued[0] + td->nr_queued[1];
>  }
>  
>  static inline struct throtl_grp *throtl_ref_get_tg(struct throtl_grp *tg)
> @@ -927,7 +927,7 @@ static int throtl_dispatch(struct request_queue *q)
>  
>  	bio_list_init(&bio_list_on_stack);
>  
> -	throtl_log(td, "dispatch nr_queued=%d read=%u write=%u",
> +	throtl_log(td, "dispatch nr_queued=%u read=%u write=%u",
>  			total_nr_queued(td), td->nr_queued[READ],
>  			td->nr_queued[WRITE]);
>  
> @@ -970,7 +970,7 @@ throtl_schedule_delayed_work(struct throtl_data *td, unsigned long delay)
>  	struct delayed_work *dwork = &td->throtl_work;
>  
>  	/* schedule work if limits changed even if no bio is queued */
> -	if (total_nr_queued(td) > 0 || td->limits_changed) {
> +	if (total_nr_queued(td) || td->limits_changed) {
>  		/*
>  		 * We might have a work scheduled to be executed in future.
>  		 * Cancel that and schedule a new one.
> -- 
> 1.7.6.rc1
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