netdev - Re: mac80211: NOHZ: local_softirq

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Message-Id: <1254322466.3959.5.camel@johannes.local>
Date:	Wed, 30 Sep 2009 16:54:26 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	Kalle Valo <kalle.valo@....fi>
Cc:	Michael Buesch <mb@...sch.de>,
	Oliver Hartkopp <socketcan@...tkopp.net>,
	"John W. Linville" <linville@...driver.com>,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: mac80211: NOHZ: local_softirq_pending 08

On Wed, 2009-09-30 at 17:47 +0300, Kalle Valo wrote:

> I agree with Michael. The bug is real and I have verified that
> Michael's patch fixes the issue. Better to apply the patch now, it's
> trivial to change the implementation if/when the network stack has
> support for this.

FWIW, I think in mac80211 the in_interrupt() check can never return true
since we postpone all RX to the tasklet. But the tasklet seems to be ok
-- so should it really be in_interrupt()?

johannes

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