From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754144AbdBQAt6 (ORCPT ); Thu, 16 Feb 2017 19:49:58 -0500 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:33769 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752853AbdBQAt4 (ORCPT ); Thu, 16 Feb 2017 19:49:56 -0500 Message-ID: <1487292582.22520.12.camel@decadent.org.uk> Subject: Re: Bug#855183: linux-image-4.9.0-0.bpo.1-amd64: modprobe intel_rapl_perf stay in uninterruptible sleep From: Ben Hutchings To: x86@kernel.org Cc: Miloslav Hula , 855183@bugs.debian.org, LKML Date: Fri, 17 Feb 2017 00:49:42 +0000 In-Reply-To: <20170215080829.27308.94177.reportbug@imap.fsv.cvut.cz> References: <20170215080829.27308.94177.reportbug@imap.fsv.cvut.cz> Content-Type: multipart/signed; micalg="pgp-sha512"; protocol="application/pgp-signature"; boundary="=-Tq7ZOe1lkFDnOVRvKvql" X-Mailer: Evolution 3.22.4-1 Mime-Version: 1.0 X-SA-Exim-Connect-IP: 2a02:8011:400e:2:6f00:88c8:c921:d332 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-Tq7ZOe1lkFDnOVRvKvql Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2017-02-15 at 09:08 +0100, Miloslav Hula wrote: [...] > When I boot the system up, there is a constant load 1.0. I found one > process systemd-udevd in uninterruptible sleep. > Digging in proc/PID/fd I found, this proces usees fd 7 for > intel_rapl_perf.ko >=20 > * What exactly did you do (or not do) that was effective (or > ineffective)? > I rmmod intel_rapl_perf, the systemd-udevd process disappeared. I > tried to load intel_rapl_perf manually. >=20 > * What was the outcome of this action? > Now, the modprobe is in uninterruptible sleep [...] Here's a traceback for that: > [ 1090.784109] INFO: task systemd-udevd:1182 blocked for more than 120 se= conds. > [ 1090.784167]=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Not tainted 4.9.0= -0.bpo.1-amd64 #1 > [ 1090.784202] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disable= s this message. > [ 1090.784254] systemd-udevd=C2=A0=C2=A0=C2=A0D=C2=A0=C2=A0=C2=A0=C2=A00= =C2=A0=C2=A01182=C2=A0=C2=A0=C2=A01098 0x00000004 > [ 1090.784260]=C2=A0=C2=A0ffffa079b6c9d000 0000000000000000 ffffa089b8ffa= 0c0 ffffa079b688c140 > [ 1090.784265]=C2=A0=C2=A0ffffa089bf2987c0 ffffc1d3ce12bb30 ffffffff929f5= 36d ffffa089bf3d8828 > [ 1090.784268]=C2=A0=C2=A0ffffc1d3ce12bb60 00000000924b0afe ffffa089bf298= 7c0 ffffa079b688c140 > [ 1090.784272] Call Trace: > [ 1090.784284]=C2=A0=C2=A0[] ? __schedule+0x23d/0x6d0 > [ 1090.784308]=C2=A0=C2=A0[] ? uncore_cpu_prepare+0x100= /0x100 [intel_uncore] > [ 1090.784310]=C2=A0=C2=A0[] ? schedule+0x32/0x80 > [ 1090.784316]=C2=A0=C2=A0[] ? schedule_timeout+0x21c/0= x3c0 > [ 1090.784327]=C2=A0=C2=A0[] ? enqueue_task_fair+0x74/0= x950 > [ 1090.784329]=C2=A0=C2=A0[] ? __schedule+0x245/0x6d0 > [ 1090.784336]=C2=A0=C2=A0[] ? sched_clock+0x5/0x10 > [ 1090.784344]=C2=A0=C2=A0[] ? uncore_cpu_prepare+0x100= /0x100 [intel_uncore] > [ 1090.784347]=C2=A0=C2=A0[] ? wait_for_completion+0xfa= /0x130 > [ 1090.784353]=C2=A0=C2=A0[] ? wake_up_q+0x60/0x60 > [ 1090.784358]=C2=A0=C2=A0[] ? cpuhp_issue_call+0x96/0x= c0 > [ 1090.784361]=C2=A0=C2=A0[] ? __cpuhp_setup_state+0xca= /0x200 > [ 1090.784369]=C2=A0=C2=A0[] ? intel_uncore_init+0x1f7/= 0xeaa [intel_uncore] > [ 1090.784376]=C2=A0=C2=A0[] ? uncore_type_init+0x156/0= x156 [intel_uncore] > [ 1090.784383]=C2=A0=C2=A0[] ? do_one_initcall+0x4c/0x1= 80 > [ 1090.784393]=C2=A0=C2=A0[] ? do_init_module+0x5a/0x1f= 1 > [ 1090.784400]=C2=A0=C2=A0[] ? load_module+0x23c9/0x28f= 0 > [ 1090.784403]=C2=A0=C2=A0[] ? __symbol_put+0x60/0x60 > [ 1090.784411]=C2=A0=C2=A0[] ? vfs_read+0x114/0x130 > [ 1090.784418]=C2=A0=C2=A0[] ? security_capable+0x41/0x= 60 > [ 1090.784421]=C2=A0=C2=A0[] ? SYSC_finit_module+0x8e/0= xe0 > [ 1090.784425]=C2=A0=C2=A0[] ? system_call_fast_compare= _end+0xc/0x9b [...] The CPU is a Broadwell (I don't have more information than that); here's the model information from DMI: > ** Model information > sys_vendor: Supermicro > product_name: X10DRi > product_version: 123456789 > chassis_vendor: Default string > chassis_version: Default string > bios_vendor: American Megatrends Inc. > bios_version: 2.1 > board_vendor: Supermicro > board_name: X10DRi > board_version: 1.02B [...] The full bug report is at , with a little more system information. Ben. --=20 Ben Hutchings Any sufficiently advanced bug is indistinguishable from a feature. --=-Tq7ZOe1lkFDnOVRvKvql Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEErCspvTSmr92z9o8157/I7JWGEQkFAlimSKcACgkQ57/I7JWG EQnlcQ/9Gh/I4dYayqX18MhJCx2VFKIKHWwdYmmG4Inz+cF5xj9PVV7pHMQd0TyA CDLe9ew9xG4VD8Qzh0yk4bNmKF8H/wnYdiyOUjFiB7RPnK/BMUvLwddkJj53Bqfn pl+2TJ3EPH2HUJLyuc5CHWs70vOWqPS9s4o1wXqyDy7sayU5BhVtw99Z5+vEWieG 86eFopQrI5rJbzSU/QiYh61AsR9U5qDeiUsVZ/ZN9V5zcpDShZgvif7R/FureLqL GxA0Q2Gao02FdPZOp11RSb0wcb3XSWEUHInquMbQm1V+1/B9Ec9Kv266pfVI6sLI yZRQGLDdGHDh25fPa/AYgmbh9wlXF5mjusJn7zprI0VOBOkVNPtMovVOXcZSLCoA L6qkjWXrv+6tVa/m2YG1dTMZ4UKcB/FyUVv7JeTVhThstNBjmx+Ttcl82nLRhCt/ eQ2wSQegsO44+uUsNnZsaM/xj8qDCAxJ3c2YhkPnxFYJZ7uxCvJ2oCtFribQ7pxj 7sgjQ7wn+9b9fZoBK/7yqI4+LVVGWa20SIJVopn/GmJVC6ExoCsr3m6OlMUwCpC2 a9ratiUJnekQDLvhW4ux1TmsgMEGmzYciiU1CxKZ+d1ELmCQvlWeH8YfKVz01Yhh aNbso8EulqW0NsOMDaYXAXwP+JZGaNegT55iOEiYKD8mqIKKzqE= =4Z8s -----END PGP SIGNATURE----- --=-Tq7ZOe1lkFDnOVRvKvql--