linux-kernel - Re: [PATCH 2/3] net: lpc_eth: Increase number of TX descriptors

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Message-ID: <1339402916.6001.1688.camel@edumazet-glaptop>
Date:	Mon, 11 Jun 2012 10:21:56 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Roland Stigge <stigge@...com.de>
Cc:	davem@...emloft.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, kevin.wells@....com,
	srinivas.bakki@....com, aletes.xgr@...il.com,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/3] net: lpc_eth: Increase number of TX descriptors

On Mon, 2012-06-11 at 10:03 +0200, Roland Stigge wrote:
> Since we have enough SRAM, we can increase the number of TX descriptors, so the
> "BUSY" warning about occupied TX descriptors doesn't need to show up as often.
> 
> Signed-off-by: Roland Stigge <stigge@...com.de>
> Tested-by: Alexandre Pereira da Silva <aletes.xgr@...il.com>
> 
> ---
>  drivers/net/ethernet/nxp/lpc_eth.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> --- linux-2.6.orig/drivers/net/ethernet/nxp/lpc_eth.c
> +++ linux-2.6/drivers/net/ethernet/nxp/lpc_eth.c
> @@ -56,7 +56,7 @@
>  
>  #define ENET_MAXF_SIZE 1536
>  #define ENET_RX_DESC 48
> -#define ENET_TX_DESC 16
> +#define ENET_TX_DESC 32
>  
>  #define NAPI_WEIGHT 16
>  


Sorry, this is not the right fix.

You only lower probability of the bug.

What is this BUSY warning mentioned in changelog ?


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