Return-path: Received: from xc.sipsolutions.net ([83.246.72.84]:35137 "EHLO sipsolutions.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750820AbYG2McH (ORCPT ); Tue, 29 Jul 2008 08:32:07 -0400 Subject: Re: [BUG] wireless : cpu stuck for 61s From: Johannes Berg To: Dave Young Cc: linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org In-Reply-To: <20080729055731.GA3265@darkstar> (sfid-20080729_075630_082047_A76939B2) References: <20080729055731.GA3265@darkstar> (sfid-20080729_075630_082047_A76939B2) Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-kyWXSlAmbCdnLeYTI2Qr" Date: Tue, 29 Jul 2008 14:32:04 +0200 Message-Id: <1217334724.10489.47.camel@johannes.berg> (sfid-20080729_143211_590846_BB841CA4) Mime-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: --=-kyWXSlAmbCdnLeYTI2Qr Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Tue, 2008-07-29 at 13:57 +0800, Dave Young wrote: > While set my wlan0 to ad-hoc mode and then set the essid to something, > this bug triggered. >=20 > I suspect it's related to debugfs or mutex? But I'm not sure. >=20 > Jul 29 13:01:46 darkstar kernel: [ 8033.736493] BUG: soft lockup - CPU#0 = stuck for 61s! [events/0:9] > Jul 29 13:01:46 darkstar kernel: [ 8033.736493]=20 > Jul 29 13:01:46 darkstar kernel: [ 8033.736493] Pid: 9, comm: events/0 Ta= inted: G W (2.6.26-smp #3) > Jul 29 13:01:46 darkstar kernel: [ 8033.736493] EIP: 0060:[] EF= LAGS: 00000246 CPU: 0 > Jul 29 13:01:46 darkstar kernel: [ 8033.736493] EIP is at mutex_lock_nest= ed+0x1b3/0x280 > Jul 29 13:01:46 darkstar kernel: [ 8033.736493] EAX: 00000000 EBX: f7bf52= 84 ECX: f7c7e000 EDX: f7bf52a8 > Jul 29 13:01:46 darkstar kernel: [ 8033.736493] ESI: f7bf5288 EDI: 000002= 46 EBP: f7c7fedc ESP: f7c7fe9c > Jul 29 13:01:46 darkstar kernel: [ 8033.736493] DS: 007b ES: 007b FS: 00= d8 GS: 0000 SS: 0068 > Jul 29 13:01:46 darkstar kernel: [ 8033.736493] CR0: 8005003b CR2: b800c5= ac CR3: 36e71000 CR4: 000006d0 > Jul 29 13:01:46 darkstar kernel: [ 8033.736493] DR0: 00000000 DR1: 000000= 00 DR2: 00000000 DR3: 00000000 > Jul 29 13:01:46 darkstar kernel: [ 8033.736493] DR6: ffff0ff0 DR7: 000004= 00 > Jul 29 13:01:46 darkstar kernel: [ 8033.736493] [] ? debugfs_c= reate_file+0x46/0x210 It looks like it's getting stuck on mutex_lock(&parent->d_inode->i_mutex); inside debugfs_create_by_name, but I have no idea why that would happen. johannes --=-kyWXSlAmbCdnLeYTI2Qr Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Comment: Johannes Berg (powerbook) iQIcBAABAgAGBQJIjw3BAAoJEKVg1VMiehFYOZwP/11dY3jSjsgijyXBZjeB+Kn6 dCiil4c110dgMF/Q1e1vO/RaGc9pQPfx0vagFPGFYVszGUF36EXmPBMlB2XdT22k K3HCnmxFYxqPekWnxS1RNAJO5B6jxQzu0qpnIm5inO9XH/HrEv4MJh2e2A7+1PHb clHVn1dl4srQBytqPxvRomKMjIggvUGywYSP0yLYxO3S5VzQlWu1mkeOqS6jHgaz O30MusmWIFdmXkArYlpSJvRc9oKpjKph77xb5FpP/EhWjWyAERaDZQcuTO/0VDZL laJYI6c1cNmEZY7If7jv19huPYiAZMtCW3F5U/DkNHEPZRK/+SQgtzhWEp2MGqmk fpTanM9koK2XXS0wk+dySLavTcXRRDduQ+225Iv58A2MSIOisOB4TzTFpGkxdfsI YPn8AzdV8/bxwfSVy3RLehE2MppoUkneAzSvufm+XYyOk/4mmUBRTlmIYZrIZMhG /k/Ui6blIaN1fcaQ1uFDod13Bz0UdBletodXf8dgIwdon7bZS6TUziTqCBz6zEj9 98Zf35D/1Yu0G85rBfNqHw4cluehpnqf2xkuFe6Bz3+hFrCPWoPw1O8lH+Tpx1E+ ykCakCZfDdZnKEeKR/RS+zETrBlOUny8ipeeFviaZRDqYGzGWEvigINmZoegTUeY 5UfVH0Rbx/uu/kF5Hfs8 =/HPO -----END PGP SIGNATURE----- --=-kyWXSlAmbCdnLeYTI2Qr--