netdev - Re: Throughput regression with `tcp: refine TSO autosizing`

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Date:	Wed, 04 Feb 2015 13:55:20 +0100
From:	Johannes Berg <johannes@...solutions.net>
To:	Michal Kazior <michal.kazior@...to.com>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	linux-wireless <linux-wireless@...r.kernel.org>,
	Network Development <netdev@...r.kernel.org>,
	eyalpe@....mellanox.co.il
Subject: Re: Throughput regression with `tcp: refine TSO autosizing`

On Wed, 2015-02-04 at 13:53 +0100, Michal Kazior wrote:

> The hardware itself seems to be capable. The firmware is a problem
> though. I'm also not sure if mac80211 can handle this as is. No 802.11
> driver seems to support SG except wil6210 which uses cfg80211 and
> netdevs directly.

mac80211 cannot deal with this right now. This would make a good topic
for the workshop since there's interest elsewhere in this as well. It's
probably not terribly hard to do as far as mac80211 is concerned.

How much offload do you really have though? Sometimes people just want
to build A-MSDUs.

johannes

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