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Date:   Thu, 5 Mar 2020 12:02:55 +0530
From:   Yadu Kishore <>
To:     David Laight <>,
        Willem de Bruijn <>,
        David Miller <>
Cc:     Network Development <>
Subject: Re: [PATCH v2] net: Make skb_segment not to compute checksum if
 network controller supports checksumming

Hi all,

Though there is scope to optimise the checksum code (from C to asm) for such
architectures, it is not the intent of this patchset.
The intent here is only to enable offloading checksum during GSO.

The perf data I presented shows that ~7.4% of the CPU is spent doing checksum
in the GSO path for architectures where the checksum code is not implemented in
assembly (arm64).
If the network controller hardware supports checksumming, then I feel
that it is worthwhile to offload this even during GSO for such architectures
and save the 7.25% of the host cpu cycles.

Yadu Kishore

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