From: Andi Kleen <ak@suse.de>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: David Miller <davem@davemloft.net>,
netdev@vger.kernel.org, johnpol@2ka.mipt.ru
Subject: Re: skb_shared_info()
Date: Mon, 14 Aug 2006 10:18:05 +0200 [thread overview]
Message-ID: <200608141018.05649.ak@suse.de> (raw)
In-Reply-To: <20060814075045.GA1437@gondor.apana.org.au>
On Monday 14 August 2006 09:50, Herbert Xu wrote:
> On Mon, Aug 14, 2006 at 09:45:53AM +0200, Andi Kleen wrote:
> >
> > Even for 1.5k MTU? (which is still the most common case after all)
>
> Ideally they would stay in kmalloc memory. Could you explain the cache
> colouring problem for 1500-byte packets?
kmalloc rounds the 1.5k up to 2k and with that exactly two objects
fit into a 4k page. With that slab doesn't have any space left
to do cache coloring.
-Andi
prev parent reply other threads:[~2006-08-14 8:18 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-08 23:39 skb_shared_info() David Miller
2006-08-09 0:36 ` skb_shared_info() Herbert Xu
2006-08-09 0:58 ` skb_shared_info() David Miller
2006-08-09 5:35 ` skb_shared_info() Evgeniy Polyakov
2006-08-09 5:50 ` skb_shared_info() David Miller
2006-08-10 19:49 ` skb_shared_info() Evgeniy Polyakov
2006-08-11 14:00 ` skb_shared_info() Alexey Kuznetsov
2006-08-12 0:27 ` skb_shared_info() David Miller
2006-08-12 0:32 ` skb_shared_info() Herbert Xu
2006-08-13 13:04 ` skb_shared_info() Alexey Kuznetsov
2006-08-14 8:01 ` skb_shared_info() Evgeniy Polyakov
2006-08-14 13:19 ` skb_shared_info() Alexey Kuznetsov
2006-08-14 13:38 ` skb_shared_info() Evgeniy Polyakov
2006-08-15 11:30 ` skb_shared_info() Alexey Kuznetsov
2006-08-14 5:04 ` skb_shared_info() Andi Kleen
2006-08-14 7:29 ` skb_shared_info() Herbert Xu
2006-08-14 7:45 ` skb_shared_info() Andi Kleen
2006-08-14 7:50 ` skb_shared_info() Herbert Xu
2006-08-14 8:18 ` Andi Kleen [this message]
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