Subject: Re: [PATCH 2.6.24] ixgb: TX hangs under heavy load

From: "Kok, Auke" <[email-masked]>
Date: Tue, 30 Oct 2007 09:12:11 -0700

Andy Gospodarek wrote:
> Auke,
> 
> It has become clear that this patch resolves some tx-lockups on the ixgb
> driver.  IBM did some checking and realized this hunk is in your
> sourceforge driver, but not anywhere else.  Mind if we add it?

I'll quickly double check where this came from in the first place and will post
this to Jeff

Thanks!

Auke

> Signed-off-by: Andy Gospodarek <[email-masked]>
> 
> ---
> 
>  ixgb_main.c |    2 +-
>  1 files changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c
> index d444de5..3ec7a41 100644
> --- a/drivers/net/ixgb/ixgb_main.c
> +++ b/drivers/net/ixgb/ixgb_main.c
> @@ -1324,7 +1324,7 @@ ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
>  
>  			/* Workaround for premature desc write-backs
>  			 * in TSO mode.  Append 4-byte sentinel desc */
> -			if (unlikely(mss && !nr_frags && size == len
> +			if (unlikely(mss && (f == (nr_frags-1)) && size == len
>  			             && size > 8))
>  				size -= 4;
>