netdev - Re: ifconfig: page allocation failure. order:2, mode:0x20 while enabling Jumbo frame

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Date:	Fri, 12 Sep 2008 09:59:03 +0400
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Kandukuru_Suresh@....com
Cc:	netdev@...r.kernel.org
Subject: Re: ifconfig: page allocation failure. order:2, mode:0x20 while enabling Jumbo frame

Hi.

On Thu, Sep 11, 2008 at 04:42:22PM -0400, Kandukuru_Suresh@....com (Kandukuru_Suresh@....com) wrote:
>  On my Nas device (Linux kernel 2.6.22.7)  when I try enable to jumbo
> frame the following error is coming. I  did not find enough information
> from the net. So I  am mailing this. Please guide me  what is happening
> here and How to resolve this error?

Device or driver does not support multiple page network buffers, so it
tries to allocate huge buffer (4 pages) for each packet.
I can not find eth_rx_fill() function in a recent kernel, so maybe
driver was rewritten after .22 release and now supports per-page split
of the packet, so it will happily live with jumbo frames.

-- 
	Evgeniy Polyakov
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