From: David Miller <davem@davemloft.net>
To: nbd@openwrt.org
Cc: netdev@vger.kernel.org, mb@bu3sch.de
Subject: Re: [PATCH v2] b44: fix misalignment and wasted space in rx handling
Date: Fri, 09 Jan 2009 23:08:17 -0800 (PST) [thread overview]
Message-ID: <20090109.230817.36393679.davem@davemloft.net> (raw)
In-Reply-To: <4967459D.3070207@openwrt.org>
From: Felix Fietkau <nbd@openwrt.org>
Date: Fri, 09 Jan 2009 13:39:57 +0100
> Broadcom 4400 puts a header of configurable size (apparently needs
> to be at least 28 bytes) in front of received packets. When handling
> this, the previous code accidentally added the offset 30 *twice* for
> the software and once for the hardware, thereby cancelling out the
> IP alignment effect of the 30 byte padding and wasting an additional
> 30 bytes of memory per packet.
>
> This patch fixes this problem and improves routing throughput by
> about 30% on MIPS, where unaligned access is expensive.
>
> Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Applied.
prev parent reply other threads:[~2009-01-10 7:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-09 12:39 [PATCH v2] b44: fix misalignment and wasted space in rx handling Felix Fietkau
2009-01-09 22:25 ` Michael Buesch
2009-01-09 22:55 ` Felix Fietkau
2009-01-10 7:08 ` David Miller [this message]
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