linux-kernel - Re: [PATCH v2 1/1] nouveau: ratelimit IRQ messages

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20101004162441.GA2823@joi.lan>
Date:	Mon, 4 Oct 2010 18:24:41 +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 v2 1/1] nouveau: ratelimit IRQ messages

On Mon, Oct 04, 2010 at 03:11:30PM +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>
> Cc: Marcin Slusarz <marcin.slusarz@...il.com>

FWIW
Reviewed-by: Marcin Slusarz <marcin.slusarz@...il.com>

> ---
>  drivers/gpu/drm/nouveau/nouveau_irq.c |   23 +++++++++++++----------
>  1 files changed, 13 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/gpu/drm/nouveau/nouveau_irq.c b/drivers/gpu/drm/nouveau/nouveau_irq.c
> index 794b0ee..5b097b4 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_irq.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_irq.c
> @@ -41,6 +41,13 @@
>  #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)
>  {
> @@ -200,7 +207,9 @@ 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 (nouveau_ratelimit())
> +				NV_INFO(dev, "PFIFO_DMA_PUSHER - Ch %d\n",
> +						chid);
>  
>  			status &= ~NV_PFIFO_INTR_DMA_PUSHER;
>  			nv_wr32(dev, NV03_PFIFO_INTR_0,
> @@ -227,8 +236,9 @@ 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;
>  		}
> @@ -505,13 +515,6 @@ 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)
> -- 
> 1.7.3.1
> 
> 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/