linux-kernel - Re: [PATCH 0/3] Receive Side Coalescing for macb driver

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Message-Id: <20180417.095332.47355231483878538.davem@davemloft.net>
Date:   Tue, 17 Apr 2018 09:53:32 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     rafalo@...ence.com
Cc:     nicolas.ferre@...rochip.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, piotrs@...ence.com,
        ltyrala@...ence.com
Subject: Re: [PATCH 0/3] Receive Side Coalescing for macb driver

From: Rafal Ozieblo <rafalo@...ence.com>
Date: Tue, 17 Apr 2018 08:59:35 +0000

> If IP supports RSC and skb has 2B reserved for alignment we end up
> with none packets receive correctly (2B missing in the each skb).
> We can either leave few customers without support in Linux driver or
> let them use the driver with decrease performance.

You probably want to find a way to memmove() the headers to be aligned
in this case, and then point the data afterwards into SKB page frags.