From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933270Ab3CGTR2 (ORCPT ); Thu, 7 Mar 2013 14:17:28 -0500 Received: from lennier.cc.vt.edu ([198.82.162.213]:47614 "EHLO lennier.cc.vt.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756847Ab3CGTR1 (ORCPT ); Thu, 7 Mar 2013 14:17:27 -0500 X-Mailer: exmh version 2.8.0 04/21/2012 with nmh-1.4-dev To: Fengguang Wu Cc: Nathan Zimmer , Andrew Morton , Stephen Rothwell , linux-kernel@vger.kernel.org Subject: Re: [procfs] BUG: sleeping function called from invalid context at mm/slub.c:925 In-Reply-To: Your message of "Thu, 07 Mar 2013 22:12:24 +0800." <20130307141224.GA6506@localhost> From: Valdis.Kletnieks@vt.edu References: <20130307141224.GA6506@localhost> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1362683738_1857P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Thu, 07 Mar 2013 14:15:38 -0500 Message-ID: <3041.1362683738@turing-police.cc.vt.edu> X-Mirapoint-Received-SPF: 198.82.161.152 auth3.smtp.vt.edu Valdis.Kletnieks@vt.edu 2 pass X-Junkmail-Status: score=10/50, host=dagger.cc.vt.edu X-Junkmail-Signature-Raw: score=unknown, refid=str=0001.0A020209.5138E75B.0199,ss=1,re=0.000,fgs=0, ip=0.0.0.0, so=2011-07-25 19:15:43, dmn=2011-05-27 18:58:46, mode=single engine X-Junkmail-IWF: false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --==_Exmh_1362683738_1857P Content-Type: text/plain; charset=us-ascii On Thu, 07 Mar 2013 22:12:24 +0800, Fengguang Wu said: > I got the below dmesg and the first bad commit is > > commit a21813be23329e2788164eab532e79cb0e513cfc > Author: Nathan Zimmer > Date: Sat Mar 2 15:25:37 2013 +1100 > > procfs: improve scaling in proc > [ 78.994163] atkbd: probe of serio1 rejects match -19 > [ 79.196148] Freeing unused kernel memory: 664k freed > [ 80.786460] BUG: sleeping function called from invalid context at /c/kernel-tests/src/tip/mm/slub.c:925 I'm seeing a very similar issue on SLAB in next-20130306. x86_64 on a 2-core Dell Latitude laptop. Haven't bisected yet. [ 9.295661] #0: HDA Intel at 0xf6fdc000 irq 50 [ 9.324345] Freeing unused kernel memory: 968k freed [ 9.350431] Write protecting the kernel read-only data: 10240k [ 9.377094] Freeing unused kernel memory: 20k freed [ 9.404963] Freeing unused kernel memory: 412k freed [ 9.439653] BUG: sleeping function called from invalid context at mm/slab.c:3056 [ 9.505448] in_atomic(): 0, irqs_disabled(): 0, pid: 1, name: systemd [ 9.531235] 2 locks held by systemd/1: [ 9.557046] #0: (rcu_read_lock){.+.+.+}, at: [] rcu_read_lock+0x0/0x6c [ 9.583626] #1: (rcu_read_lock){.+.+.+}, at: [] rcu_read_lock+0x0/0x6c [ 9.609793] Pid: 1, comm: systemd Not tainted 3.9.0-rc1-next-20130306 #63 [ 9.636291] Call Trace: [ 9.662218] [] __might_sleep+0x19e/0x1a5 [ 9.687970] [] cache_alloc_debugcheck_before.isra.40+0x1d/0x1f [ 9.713908] [] kmem_cache_alloc_trace+0x35/0xec [ 9.740070] [] ? cmdline_proc_open+0x17/0x17 [ 9.765894] [] ? single_open+0x8f/0x8f [ 9.791251] [] single_open+0x2c/0x8f [ 9.816509] [] cmdline_proc_open+0x15/0x17 [ 9.841728] [] proc_reg_open+0xcb/0x143 [ 9.866926] [] ? proc_tty_unregister_driver+0x2d/0x2d [ 9.891936] [] ? proc_reg_release+0x157/0x157 [ 9.917044] [] do_dentry_open+0x1d2/0x2ff [ 9.941631] [] finish_open+0x62/0x74 [ 9.966347] [] do_last+0x9aa/0xb79 [ 9.990594] [] path_openat+0x105/0x45e [ 10.014748] [] ? ac_get_obj.constprop.59+0x38/0x1b6 [ 10.038753] [] do_filp_open+0x37/0xc8 [ 10.062789] [] ? _raw_spin_unlock+0x58/0x64 [ 10.086744] [] ? __alloc_fd+0x175/0x187 [ 10.110608] [] do_sys_open+0x81/0x129 [ 10.134379] [] SyS_open+0x19/0x1b [ 10.158447] [] system_call_fastpath+0x16/0x1b [ 10.182213] --==_Exmh_1362683738_1857P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.13 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iQIVAwUBUTjnWgdmEQWDXROgAQLGqA/+I+2u7Tr5Yxi+Pj+rqe22wXNtw/Y0Chjf MWeS7k2irlTQBj3VnoqcuuBjkGTCaNRd3vOw4CPR7d2rDNMrnLtkS+ir/h3WNo+v ovtvkrDDmchUMAZldRoDuOzKRwM8knSd1CDifPMC9R/z3uXuDF6wBGQAHV4Ln5sy /AQ5mXpZv6jKfVkY4mLcV8urC1SYPzVdyHNike7fiYyrA3LmnT30qv265kOblM9j fHieLuTtUe9Q4q62AEbChdLaVMAztoWiJzbnYuHyp6iQe6sydPZ5dxPDVNLDrTVP 5hIlknglVfG7og4TZ/mwgFdk9B7pcY4ZVWOOb5RYHGMvh+MtwEmjxaFw227uOfEV JkdDMOyIOlWdsCA9vSd5Z5wJuEUx3pQIVY0heoF/gHJ60o143jc7UrPpbMabfBXb LaCzOZPdGkJ1rpqtg4UOEHS/1MC5N8ifc+dCzlhS+XpDNJ0vf/mTKoHlEvwzMoRk nnDvowSPgsJq2tEWu16szvfNWBFewi8VKaLNYPO1fgt4r7ogiI2wrHyb3Jf6xRWg 3M1pUngcCfgqVIQFZJbKmc/gpS/HAIdWvkkZddLNN8AIrQZ0NYRd1kB/eTpUEZre LJSnfyAkmZKWAA0py/l858qirS56wloc3DZHeAxlTTasAjj2VjHmOdVuUEqZwFe+ PUyfRDe2owQ= =1sYe -----END PGP SIGNATURE----- --==_Exmh_1362683738_1857P--