netdev - Re: [PATCH 2/2] net/core: remove explicit do_softirq() from busy_poll

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Message-Id: <20170620.130945.326025562609465610.davem@davemloft.net>
Date:   Tue, 20 Jun 2017 13:09:45 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     bigeasy@...utronix.de
Cc:     edumazet@...gle.com, netdev@...r.kernel.org, tglx@...utronix.de
Subject: Re: [PATCH 2/2] net/core: remove explicit do_softirq() from
 busy_poll_stop()

From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Date: Fri, 16 Jun 2017 19:24:00 +0200

> Since commit 217f69743681 ("net: busy-poll: allow preemption in
> sk_busy_loop()") there is an explicit do_softirq() invocation after
> local_bh_enable() has been invoked.
> I don't understand why we need this because local_bh_enable() will
> invoke do_softirq() once the softirq counter reached zero and we have
> softirq-related work pending.
> 
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>

This indeed is superfluous, applied, thanks.