From: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
To: David Miller <davem@davemloft.net>
Cc: herbert@gondor.apana.org.au, arnd@arndnet.de,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: problems with e1000 and jumboframes
Date: Fri, 4 Aug 2006 09:58:53 +0400 [thread overview]
Message-ID: <20060804055853.GA413@2ka.mipt.ru> (raw)
In-Reply-To: <20060803.225501.77357103.davem@davemloft.net>
On Thu, Aug 03, 2006 at 10:55:01PM -0700, David Miller (davem@davemloft.net) wrote:
> From: Herbert Xu <herbert@gondor.apana.org.au>
> Date: Fri, 04 Aug 2006 15:52:40 +1000
>
> > Evgeniy Polyakov <johnpol@2ka.mipt.ru> wrote:
> > >
> > > But it does not support splitting them into page sized chunks, so it
> > > requires the whole jumbo frame allocation in one contiguous chunk, 9k
> > > will be transferred into 16k allocation (order 3), since SLAB uses
> > > power-of-2 allocation.
> >
> > Actually order 3 is 32KB.
Yep, e1000 align 9k to 16k, then alloc_skb adds shared info and align it
to 32k.
> It's 64KB on my computer :)
Nice overhead...
--
Evgeniy Polyakov
next prev parent reply other threads:[~2006-08-04 5:59 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-03 13:48 problems with e1000 and jumboframes Arnd Hannemann
2006-08-03 13:59 ` Evgeniy Polyakov
2006-08-03 14:37 ` Arnd Hannemann
2006-08-03 15:03 ` Evgeniy Polyakov
2006-08-03 15:08 ` Krzysztof Oledzki
2006-08-03 15:16 ` Evgeniy Polyakov
2006-08-03 15:37 ` Arnd Hannemann
2006-08-03 15:43 ` Evgeniy Polyakov
2006-08-03 15:41 ` Evgeniy Polyakov
2006-08-03 18:09 ` Arnd Hannemann
2006-08-03 18:29 ` Evgeniy Polyakov
2006-08-03 21:40 ` Arnd Hannemann
2006-08-03 15:57 ` Chris Leech
2006-08-03 16:10 ` Evgeniy Polyakov
2006-08-03 20:32 ` Chris Leech
2006-08-04 6:20 ` Evgeniy Polyakov
2006-08-04 15:16 ` Chris Leech
2006-08-03 16:24 ` Arnd Hannemann
2006-08-03 20:34 ` Chris Leech
2006-08-04 5:59 ` Herbert Xu
2006-08-04 6:15 ` Evgeniy Polyakov
2006-08-04 15:34 ` Chris Leech
2006-08-04 19:42 ` Evgeniy Polyakov
2006-08-04 21:02 ` Jesse Brandeburg
2006-08-05 9:58 ` Evgeniy Polyakov
2006-08-05 10:09 ` Herbert Xu
2006-08-05 10:24 ` Evgeniy Polyakov
2006-08-05 10:33 ` Herbert Xu
2006-08-05 10:41 ` Evgeniy Polyakov
2006-08-03 15:23 ` Evgeniy Polyakov
2006-08-04 5:52 ` Herbert Xu
2006-08-04 5:55 ` David Miller
2006-08-04 5:58 ` Evgeniy Polyakov [this message]
2006-08-03 14:24 ` Benjamin LaHaise
2006-08-03 14:49 ` Krzysztof Oledzki
2006-08-03 14:52 ` Benjamin LaHaise
2006-08-03 15:04 ` Krzysztof Oledzki
2006-08-03 15:32 ` Arnd Hannemann
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