netdev - Re: [PATCH net-next] net: Implement fast csum_partial for x86

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Message-Id: <20160104.220108.58746007572013351.davem@davemloft.net>
Date:	Mon, 04 Jan 2016 22:01:08 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	tom@...bertland.com
Cc:	netdev@...r.kernel.org, kernel-team@...com
Subject: Re: [PATCH net-next] net: Implement fast csum_partial for x86_64

From: Tom Herbert <tom@...bertland.com>
Date: Sun, 3 Jan 2016 15:22:27 -0800

> Implement assembly routine for csum_partial for 64 bit x86. This
> primarily speeds up checksum calculation for smaller lengths such as
> those that are present when doing skb_postpull_rcsum when getting
> CHECKSUM_COMPLETE from device or after CHECKSUM_UNNECESSARY
> conversion.
> 
> This implementation is similar to csum_partial implemented in
> checksum_32.S, however since we are dealing with 8 bytes at a time
> there are more cases for alignment and small lengths-- for those we
> employ jump tables.

Looks great, but probably has to go through the x86 maintainers
as Eric suggested.
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