linux-kernel - Re: [PATCH 1/1] nouveau: ratelimit IRQ messages

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Date:	Sat, 2 Oct 2010 12:05:03 +0200
From:	Marcin Slusarz <marcin.slusarz@...il.com>
To:	Jiri Slaby <jslaby@...e.cz>
Cc:	airlied@...hat.com, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org, jirislaby@...il.com,
	Ben Skeggs <bskeggs@...hat.com>
Subject: Re: [PATCH 1/1] nouveau: ratelimit IRQ messages

On Sat, Oct 02, 2010 at 09:58:56AM +0200, Jiri Slaby wrote:
> There are two messages in the ISR of nouvea which might be printed out
> hundred times in a second. Ratelimit them.
> 
> Signed-off-by: Jiri Slaby <jslaby@...e.cz>
> Cc: Ben Skeggs <bskeggs@...hat.com>
> ---
>  drivers/gpu/drm/nouveau/nouveau_irq.c |    9 ++++++---
>  1 files changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/nouveau/nouveau_irq.c b/drivers/gpu/drm/nouveau/nouveau_irq.c
> index 794b0ee..c6d57eb 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_irq.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_irq.c
> @@ -200,7 +200,9 @@ nouveau_fifo_irq_handler(struct drm_device *dev)
>  		}
>  
>  		if (status & NV_PFIFO_INTR_DMA_PUSHER) {
> -			NV_INFO(dev, "PFIFO_DMA_PUSHER - Ch %d\n", chid);
> +			if (printk_ratelimit())
> +				NV_INFO(dev, "PFIFO_DMA_PUSHER - Ch %d\n",
> +						chid);

There's nouveau_ratelimit() for this.
  
>  			status &= ~NV_PFIFO_INTR_DMA_PUSHER;
>  			nv_wr32(dev, NV03_PFIFO_INTR_0,
> @@ -227,8 +229,9 @@ nouveau_fifo_irq_handler(struct drm_device *dev)
>  		}
>  
>  		if (status) {
> -			NV_INFO(dev, "PFIFO_INTR 0x%08x - Ch %d\n",
> -				status, chid);
> +			if (printk_ratelimit())
> +				NV_INFO(dev, "PFIFO_INTR 0x%08x - Ch %d\n",
> +					status, chid);
>  			nv_wr32(dev, NV03_PFIFO_INTR_0, status);
>  			status = 0;
>  		}
> -- 
> 1.7.3.1
> 
> 
> --
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