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Re: [PATCH 3/3] SGI Altix cross partition functionality (2nd revision)

To: Dean Nelson <dcn@xxxxxxx>
Subject: Re: [PATCH 3/3] SGI Altix cross partition functionality (2nd revision)
From: "David S. Miller" <davem@xxxxxxxxxxxxx>
Date: Wed, 23 Mar 2005 12:02:48 -0800
Cc: tony.luck@xxxxxxxxx, netdev@xxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx
In-reply-to: <20050323195139.GC21418@xxxxxxx>
References: <4241C391.mailxHNA15A8V0@xxxxxxxxxxxxxxxxxxxxx> <20050323195139.GC21418@xxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
On Wed, 23 Mar 2005 13:51:39 -0600
Dean Nelson <dcn@xxxxxxx> wrote:

> This patch contains the cross partition pseudo-ethernet driver (XPNET)
> functional support module.
> 
> Signed-off-by: Dean Nelson <dcn@xxxxxxx>

Only a NIT or two.  You should be setting the last_rx
value.  Also, NETIF_F_HIGHDMA is pointless unless you
support NETIF_F_SG and thus paged SKBs.  skb->data will
never be placed in high memory, only non-linear SKB
scatterlist pages will.

I should probably add a debugging check at device
registration time, like we already do to make sure
NETIF_F_SG is not set unless some checksumming
capability is there as well.

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