From: Eric Dumazet <eric.dumazet@gmail.com>
To: Ben Hutchings <bhutchings@solarflare.com>
Cc: David Miller <davem@davemloft.net>,
netdev@vger.kernel.org, linux-net-drivers@solarflare.com
Subject: Re: [PATCH net-next 03/11] sfc: Increase size of RX SKB header area
Date: Wed, 19 Jun 2013 15:38:20 -0700 [thread overview]
Message-ID: <1371681500.3252.341.camel@edumazet-glaptop> (raw)
In-Reply-To: <1371680317.1956.110.camel@bwh-desktop.uk.level5networks.com>
On Wed, 2013-06-19 at 23:18 +0100, Ben Hutchings wrote:
> From: Jon Cooper <jcooper@solarflare.com>
>
> This allows the SKB to hold the headers without reallocation more often.
>
> Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
> ---
> drivers/net/ethernet/sfc/rx.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/sfc/rx.c b/drivers/net/ethernet/sfc/rx.c
> index b915e09..6efff3d 100644
> --- a/drivers/net/ethernet/sfc/rx.c
> +++ b/drivers/net/ethernet/sfc/rx.c
> @@ -36,7 +36,7 @@
> #define EFX_RECYCLE_RING_SIZE_NOIOMMU (2 * EFX_RX_PREFERRED_BATCH)
>
> /* Size of buffer allocated for skb header area. */
> -#define EFX_SKB_HEADERS 64u
> +#define EFX_SKB_HEADERS 128u
>
Yes, TCP with timestamps needs 66 bytes of headers on IPv4, and more on
IPv6...
next prev parent reply other threads:[~2013-06-19 22:38 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-19 22:16 Pull request: sfc-next 2013-06-19 Ben Hutchings
2013-06-19 22:17 ` [PATCH net-next 01/11] sfc: Fix EEH with legacy interrupts Ben Hutchings
2013-06-19 22:18 ` [PATCH net-next 02/11] sfc: Enable RX checksum offload for packets not handled by GRO Ben Hutchings
2013-06-19 22:18 ` [PATCH net-next 03/11] sfc: Increase size of RX SKB header area Ben Hutchings
2013-06-19 22:38 ` Eric Dumazet [this message]
2013-06-19 22:18 ` [PATCH net-next 04/11] sfc: Report software timestamping capabilities Ben Hutchings
2013-06-19 22:19 ` [PATCH net-next 05/11] sfc: Enable accelerated RFS on vlans Ben Hutchings
2013-06-19 22:19 ` [PATCH net-next 06/11] sfc: Define and set RX buffer flag for packets parsed as TCP Ben Hutchings
2013-06-19 22:19 ` [PATCH net-next 07/11] sfc: Do not pass non-TCP packets into GRO code Ben Hutchings
2013-06-19 22:56 ` Eric Dumazet
2013-06-19 23:18 ` Ben Hutchings
2013-06-19 22:20 ` [PATCH net-next 08/11] sfc: Implement RX SKB cache to improve latency Ben Hutchings
2013-06-19 22:20 ` [PATCH net-next 09/11] sfc: Prefetch RX skb header area Ben Hutchings
2013-06-19 22:36 ` Eric Dumazet
2013-06-19 22:39 ` Ben Hutchings
2013-06-19 22:56 ` Eric Dumazet
2013-06-19 23:10 ` Ben Hutchings
2013-06-19 22:21 ` [PATCH net-next 10/11] sfc: Fix IRQ cleanup in case of a probe failure Ben Hutchings
2013-06-19 22:21 ` [PATCH net-next 11/11] sfc: Improve test for IOMMU in use Ben Hutchings
2013-06-19 23:11 ` Pull request: sfc-next 2013-06-19 David Miller
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