netdev - Re: future developments of usbnet

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Date:	Mon, 9 May 2011 23:22:24 +0800
From:	Ming Lei <tom.leiming@...il.com>
To:	Oliver Neukum <oliver@...kum.org>
Cc:	netdev@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: future developments of usbnet

Hi,

2011/5/9 Oliver Neukum <oliver@...kum.org>:

> Do we really need to avoid it, or do we just need to recover?
> If avoidance is needed, should we use NAPI?

IMO, OOM can recover it certainly but with much cost, so we should
avoid the case. I don't think NAPI can avoid it, because NAPI will
cause skb to be allocated without any limit if there are packets
coming, still no chance left for usbnet_bh to handle and free these
SKBs.

thanks,
-- 
Ming Lei
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