linux-kernel - Re: [PATCH v3 1/1] nouveau: ratelimit IRQ messages

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Date:	Thu, 07 Oct 2010 13:41:35 +1000
From:	Ben Skeggs <bskeggs@...hat.com>
To:	Jiri Slaby <jslaby@...e.cz>
Cc:	jirislaby@...il.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/1] nouveau: ratelimit IRQ messages

On Tue, 2010-10-05 at 15:07 +0200, Jiri Slaby wrote:
> There are two messages in the ISR of nouveau which might be printed out
> hundred times in a second. Ratelimit them. (We need to move
> nouveau_ratelimit to the top of the file.)
> 
> Signed-off-by: Jiri Slaby <jslaby@...e.cz>
> Cc: Ben Skeggs <bskeggs@...hat.com>
> Reviewed-by: Marcin Slusarz <marcin.slusarz@...il.com>
> ---
> 
> 
> Rebased on the top of nouveau git.
Thank you, I've pushed this to nouveau git now.

Ben.
> 
> 
>  drivers/gpu/drm/nouveau/nouveau_irq.c |   26 ++++++++++++++------------
>  1 files changed, 14 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/gpu/drm/nouveau/nouveau_irq.c b/drivers/gpu/drm/nouveau/nouveau_irq.c
> index 6fd51a5..b9e1ffe 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_irq.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_irq.c
> @@ -42,6 +42,13 @@
>  #include "nouveau_connector.h"
>  #include "nv50_display.h"
>  
> +static DEFINE_RATELIMIT_STATE(nouveau_ratelimit_state, 3 * HZ, 20);
> +
> +static int nouveau_ratelimit(void)
> +{
> +	return __ratelimit(&nouveau_ratelimit_state);
> +}
> +
>  void
>  nouveau_irq_preinstall(struct drm_device *dev)
>  {
> @@ -213,11 +220,12 @@ nouveau_fifo_irq_handler(struct drm_device *dev)
>  				u32 ib_get = nv_rd32(dev, 0x003334);
>  				u32 ib_put = nv_rd32(dev, 0x003330);
>  
> -				NV_INFO(dev, "PFIFO_DMA_PUSHER - Ch %d Get 0x%02x%08x "
> +				if (nouveau_ratelimit())
> +					NV_INFO(dev, "PFIFO_DMA_PUSHER - Ch %d Get 0x%02x%08x "
>  					     "Put 0x%02x%08x IbGet 0x%08x IbPut 0x%08x "
>  					     "State 0x%08x Push 0x%08x\n",
> -					chid, ho_get, get, ho_put, put, ib_get, ib_put,
> -					state, push);
> +						chid, ho_get, get, ho_put, put,
> +						ib_get, ib_put, state, push);
>  
>  				/* METHOD_COUNT, in DMA_STATE on earlier chipsets */
>  				nv_wr32(dev, 0x003364, 0x00000000);
> @@ -266,8 +274,9 @@ nouveau_fifo_irq_handler(struct drm_device *dev)
>  		}
>  
>  		if (status) {
> -			NV_INFO(dev, "PFIFO_INTR 0x%08x - Ch %d\n",
> -				status, chid);
> +			if (nouveau_ratelimit())
> +				NV_INFO(dev, "PFIFO_INTR 0x%08x - Ch %d\n",
> +					status, chid);
>  			nv_wr32(dev, NV03_PFIFO_INTR_0, status);
>  			status = 0;
>  		}
> @@ -544,13 +553,6 @@ nouveau_pgraph_intr_notify(struct drm_device *dev, uint32_t nsource)
>  		nouveau_graph_dump_trap_info(dev, "PGRAPH_NOTIFY", &trap);
>  }
>  
> -static DEFINE_RATELIMIT_STATE(nouveau_ratelimit_state, 3 * HZ, 20);
> -
> -static int nouveau_ratelimit(void)
> -{
> -	return __ratelimit(&nouveau_ratelimit_state);
> -}
> -
>  
>  static inline void
>  nouveau_pgraph_intr_error(struct drm_device *dev, uint32_t nsource)


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