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Date:   Wed, 17 Apr 2019 10:13:43 +0800
From:   Herbert Xu <>
To:     Johannes Berg <>
Cc:     Toke Høiland-Jørgensen <>,
        Arend Van Spriel <>,
        Felix Fietkau <>,,
        Eric Dumazet <>,
Subject: Re: [PATCH 5/5] mac80211: set NETIF_F_LLTX when using intermediate
 tx queues

On Tue, Apr 16, 2019 at 09:13:16PM +0200, Johannes Berg wrote:
> I'm not sure how they'd even realize this, other than packets getting
> dropped? Which of course we do here as well, we didn't invent something
> that let's us expand memory arbitrarily ;-)

They rely on the queueing mechanism providing feedback via an
error return value when the queue becomes full.  From my cursory
look at net/mac80211 you seem to be always returning success in

Email: Herbert Xu <>
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