netdev - Re: mac80211: NOHZ: local_softirq

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Message-ID: <877hw534wd.fsf@litku.valot.fi>
Date:	Fri, 11 Sep 2009 17:57:54 +0300
From:	Kalle Valo <kalle.valo@....fi>
To:	Michael Buesch <mb@...sch.de>
Cc:	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	Johannes Berg <johannes@...solutions.net>
Subject: Re: mac80211: NOHZ: local_softirq_pending 08

Michael Buesch <mb@...sch.de> writes:

> Hi,

Hallo,

> mac80211 (or some other part of the networking stack) triggers this
> warning in the NOHZ code: NOHZ: local_softirq_pending 08
>
> 08 seems to be NET_RX_SOFTIRQ.
>
> It happens, because my test driver b43 handles all RX and TX-status
> callbacks in process context. I guess some part of the networking
> stack expects RX to be in tasklet and/or softirq context.
>
> We also have a report of this warning in wl1251, so it's probably not
> a b43 problem.

Yes, I see this with wl1251. It uses workqueues everywhere.

-- 
Kalle Valo
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