Return-path: Received: from xc.sipsolutions.net ([83.246.72.84]:51966 "EHLO sipsolutions.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754979AbZJKKJg (ORCPT ); Sun, 11 Oct 2009 06:09:36 -0400 Subject: Re: NOHZ: local_softirq_pending 08 From: Johannes Berg To: Dave Young Cc: linux-kernel@vger.kernel.org, tglx@linutronix.de, linux-wireless , "David S. Miller" In-Reply-To: <20091011095217.GA2200@darkstar> References: <20091011095217.GA2200@darkstar> Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-jeXzTCDyo+eyGDHJK11A" Date: Sun, 11 Oct 2009 12:08:55 +0200 Message-Id: <1255255735.4095.53.camel@johannes.local> Mime-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: --=-jeXzTCDyo+eyGDHJK11A Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Sun, 2009-10-11 at 17:52 +0800, Dave Young wrote: > With kernel 2.6.32-rc3-00052-g0eca52a I got following KERN_ERR > messages just while using firefox: >=20 > [ 130.527399] NOHZ: local_softirq_pending 08 > Any idea? or known issue? Are you using b43 (or wl12x1)? If so, it's a known issue, but the driver was recently left without an active maintainer in a brouhaha about a bug fix. Cf. http://thread.gmane.org/gmane.linux.kernel.wireless.general/39440 Absent proof that mac80211 is safe to run with BHs enabled, the correct solution is disabling tasklets around the RX function, unlike all the proposed patches. However, Michael thinks it's such a bad solution that he has refused to implement it. So far, nobody has bothered to fix the drivers. FWIW, I believe the bug to be in b43 and wl12x1, and not as Michael thinks in the stack. johannes --=-jeXzTCDyo+eyGDHJK11A Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- iQIcBAABAgAGBQJK0a6zAAoJEODzc/N7+QmalLEQAJE7mPME5/ZV+QiHOa9a6QMS OsuriRx25ka6aPfesWzULByBNZp9bFUKXAl/cQPwmULowxxBUduNnWwcAJcJD+B2 BWOeNvOplouWpk7Fa9DpmuHhYBxsOoxIQrlnWisPh1OZQfsgnGeqAjpyOA2oiYmM LOupMlsHullIEeUW+vKpVWxUGmKQrMEvzZXPT/c6RYz9/1m/YzVuc1vejm2X0Isj ZhaA6fKaRNqc75BswzeB2e0TFjK1rRR2D4AftKmWuZ3ZISPeqNU85Db5kXWYYQTy gdpgV+vaYZFgkf/gcNzKpJ9C+LpAWgPOyYnvhOHX8cDbI7ihSMOcVI+EmbNuQqh0 NU5bRszebTjgFxXt2AfjwI0V1d0Hr6dIOmtAB73xEtqGaEUc9BKKidhkN6ThJEmm +ikSq3Z/8h3N+V3N2iWboJxQzzqQBEFezSin+R3+k35/hCdr/HWNRE8VqloMisow fQlHLPmfVf+4msK2pGLt3JwxoPa6NclVzW2ewq017ZCKT9HYtBKX31QVAGPOzcsF PCweNWJ3kEpyZl1EwtynykQHRjggFFt40qRyBmRGEY9wmKujHnekFzQaLu/mgEM3 2F6sIWRNg7dQzmDOriVz9BF8wkg1iqKRnd+S17ESxzysylKu0z++6Ekt6DqzrulG 9Pe4T5RbtKlZZ5FnBq2k =Tvl/ -----END PGP SIGNATURE----- --=-jeXzTCDyo+eyGDHJK11A--