linux-kernel - Re: problems with e1000 and jumboframes

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Message-ID: <20060803152342.GC14774@2ka.mipt.ru>
Date:	Thu, 3 Aug 2006 19:23:42 +0400
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Krzysztof Oledzki <olel@....pl>
Cc:	Arnd Hannemann <arnd@...dnet.de>, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: problems with e1000 and jumboframes

On Thu, Aug 03, 2006 at 05:08:51PM +0200, Krzysztof Oledzki (olel@....pl) wrote:
> >then skb_alloc adds a little
> >(sizeof(struct skb_shared_info)) at the end, and this ends up
> >in 32k request just for 9k jumbo frame.
> 
> Strange, why this skb_shared_info cannon be added before first alignment? 
> And what about smaller frames like 1500, does this driver behave similar 
> (first align then add)?

e1000 aligns it to 2k, which will be transformed into 4k allocation.

> Best regards,
> 
> 				Krzysztof Olędzki


-- 
	Evgeniy Polyakov
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