------- Comment From mukeo...@in.ibm.com 2016-09-28 14:42 EDT------- Before the patch:: ===========
root@p8wookie:~# ps -ef | grep opal root 782 2 0 13:39 ? 00:00:00 [kopald] root 783 2 0 13:39 ? 00:00:00 [irq/29-opal-elo] root 784 2 0 13:39 ? 00:00:00 [irq/30-opal-dum] root 4089 1 0 13:40 ? 00:00:00 /usr/sbin/opal_errd root 4733 4648 0 13:42 pts/0 00:00:00 grep --color=auto opal root@p8wookie:~# ls /sys/firmware/opal/elog/ 0x50007844 root@p8wookie:~# vi /var/log/syslog Sep 28 13:42:56 p8wookie ELOG[4089]: LID[50007844]::SRC[B1763435]::Other Subsystems::Informational Event::No service action required Sep 28 13:42:56 p8wookie ELOG[4089]: Failed to acknowledge elog: /sys/firmware/opal/elog/0x50007844/acknowledge (2:No such file or directory) Sep 28 13:42:57 p8wookie ELOG[4089]: LID[50007844]::SRC[B1763435]::Other Subsystems::Informational Event::No service action required Sep 28 13:42:57 p8wookie ELOG[4089]: Failed to acknowledge elog: /sys/firmware/opal/elog/0x50007844/acknowledge (2:No such file or directory) Sep 28 13:42:58 p8wookie ELOG[4089]: LID[50007844]::SRC[B1763435]::Other Subsystems::Informational Event::No service action required Sep 28 13:42:58 p8wookie ELOG[4089]: Failed to acknowledge elog: /sys/firmware/opal/elog/0x50007844/acknowledge (2:No such file or directory) Sep 28 13:42:59 p8wookie ELOG[4089]: LID[50007844]::SRC[B1763435]::Other Subsystems::Informational Event::No service action required Sep 28 13:42:59 p8wookie ELOG[4089]: Failed to acknowledge elog: /sys/firmware/opal/elog/0x50007844/acknowledge (2:No such file or directory) Sep 28 13:43:00 p8wookie ELOG[4089]: LID[50007844]::SRC[B1763435]::Other Subsystems::Informational Event::No service action required Sep 28 13:43:00 p8wookie ELOG[4089]: Failed to acknowledge elog: /sys/firmware/opal/elog/0x50007844/acknowledge (2:No such file or directory) Sep 28 13:43:01 p8wookie ELOG[4089]: LID[50007844]::SRC[B1763435]::Other Subsystems::Informational Event::No service action required Sep 28 13:43:01 p8wookie ELOG[4089]: Failed to acknowledge elog: /sys/firmware/opal/elog/0x50007844/acknowledge (2:No such file or directory) Sep 28 13:43:02 p8wookie ELOG[4089]: LID[50007844]::SRC[B1763435]::Other Subsystems::Informational Event::No service action required Sep 28 13:43:02 p8wookie ELOG[4089]: Failed to acknowledge elog: /sys/firmware/opal/elog/0x50007844/acknowledge (2:No such file or directory) Sep 28 13:43:03 p8wookie ELOG[4089]: LID[50007844]::SRC[B1763435]::Other Subsystems::Informational Event::No service action required Sep 28 13:43:03 p8wookie ELOG[4089]: Failed to acknowledge elog: /sys/firmware/opal/elog/0x50007844/acknowledge (2:No such file or directory) After the patch: ========== root@p8wookie:~# uname -a Linux p8wookie 4.8.0-rc6mukesh+ #2 SMP Wed Sep 28 14:09:57 EDT 2016 ppc64le ppc64le ppc64le GNU/Linux root@p8wookie:~# cat /etc/os-release NAME="Ubuntu" VERSION="16.10 (Yakkety Yak)" ID=ubuntu ID_LIKE=debian PRETTY_NAME="Ubuntu 16.10" VERSION_ID="16.10" HOME_URL="http://www.ubuntu.com/"; SUPPORT_URL="http://help.ubuntu.com/"; BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"; PRIVACY_POLICY_URL="http://www.ubuntu.com/legal/terms-and-policies/privacy-policy"; VERSION_CODENAME=yakkety UBUNTU_CODENAME=yakkety root@p8wookie:~# root@p8wookie:~# ps -ef | grep opal root 782 2 0 14:35 ? 00:00:00 [kopald] root 783 2 0 14:35 ? 00:00:00 [irq/29-opal-elo] root 784 2 0 14:35 ? 00:00:00 [irq/30-opal-dum] root 4141 1 0 14:36 ? 00:00:00 /usr/sbin/opal_errd root 5011 4965 0 14:36 pts/0 00:00:00 grep --color=auto opal root@p8wookie:~# ls /sys/firmware/opal/elog/ root@p8wookie:~# dmesg |less root@p8wookie:~# root@p8wookie:~# dmesg | grep Duplicate [ 1.620962] ELOG: Duplicate logid =50007e6d root@p8wookie:~# It works as expected. -Mukesh ** Tags removed: verification-needed-xenial ** Tags added: verification-done-xenial -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1619552 Title: Failed to acknowledge elog: /sys/firmware/opal/elog/0x5018d709/acknowledge (2:No such file or directory) Status in linux package in Ubuntu: Fix Released Status in linux source package in Xenial: Fix Committed Status in linux source package in Yakkety: Fix Released Bug description: == Comment: #0 - Mukesh K. Ojha <mukeo...@in.ibm.com> - 2016-09-02 02:10:14 == ---Problem Description--- Kernel is failed to free the kobject while acknowledging the error log which has been notified two times. Contact Information = Contact Information = mukeo...@in.ibm.com ---uname output--- Ubuntu 16.04.01 LTS Machine Type = All power machine ---Debugger--- A debugger is not configured ---Steps to Reproduce--- Steps to reproduce: 1.Boot the system to petitboot. 2. Issue FSP Soft reset of Service Processor From ASMI page. 3. After FSP comes up, boot the system to host OS. 4. In the host OS seen the failure to acknowledge for one of elog. root@p8wookie ~]# service opal_errd status Redirecting to /bin/systemctl status opal_errd.service opal_errd.service - opal_errd (PowerNV platform error handling) Service Loaded: loaded (/usr/lib/systemd/system/opal_errd.service; enabled) Active: active (running) since Wed 2016-08-03 07:55:03 CDT; 2min 4s ago Process: 3452 ExecStart=/usr/libexec/ppc64-diag/opal_errd start (code=exited, status=0/SUCCESS) Main PID: 3497 (opal_errd) CGroup: /system.slice/opal_errd.service ??3497 /usr/sbin/opal_errd Aug 03 07:57:03 p8wookie.aus.stglabs.ibm.com ELOG[3497]: LID[5018d709]::SRC[B1763435]::Other Subsystems::Informational Event::No service action required Aug 03 07:57:03 p8wookie.aus.stglabs.ibm.com ELOG[3497]: Failed to acknowledge elog: /sys/firmware/opal/elog/0x5018d709/acknowledge (2:No such file or directory) Aug 03 07:57:04 p8wookie.aus.stglabs.ibm.com ELOG[3497]: LID[5018d709]::SRC[B1763435]::Other Subsystems::Informational Event::No service action required Aug 03 07:57:04 p8wookie.aus.stglabs.ibm.com ELOG[3497]: Failed to acknowledge elog: /sys/firmware/opal/elog/0x5018d709/acknowledge (2:No such file or directory) Aug 03 07:57:05 p8wookie.aus.stglabs.ibm.com ELOG[3497]: LID[5018d709]::SRC[B1763435]::Other Subsystems::Informational Event::No service action required Aug 03 07:57:05 p8wookie.aus.stglabs.ibm.com ELOG[3497]: Failed to acknowledge elog: /sys/firmware/opal/elog/0x5018d709/acknowledge (2:No such file or directory) Aug 03 07:57:06 p8wookie.aus.stglabs.ibm.com ELOG[3497]: LID[5018d709]::SRC[B1763435]::Other Subsystems::Informational Event::No service action required Aug 03 07:57:06 p8wookie.aus.stglabs.ibm.com ELOG[3497]: Failed to acknowledge elog: /sys/firmware/opal/elog/0x5018d709/acknowledge (2:No such file or directory) Aug 03 07:57:07 p8wookie.aus.stglabs.ibm.com ELOG[3497]: LID[5018d709]::SRC[B1763435]::Other Subsystems::Informational Event::No service action required Aug 03 07:57:07 p8wookie.aus.stglabs.ibm.com ELOG[3497]: Failed to acknowledge elog: /sys/firmware/opal/elog/0x5018d709/acknowledge (2:No such file or directory) [root@p8wookie ~]# cd /sys/firmware/opal/elog/ [root@p8wookie elog]# ls 0x5018d709 [root@p8wookie elog]# Stack trace output: no Oops output: no System Dump Info: The system is not configured to capture a system dump. *Additional Instructions for Contact Information = mukeo...@in.ibm.com: -Attach sysctl -a output output to the bug. == Comment: #1 - Mukesh K. Ojha <mukeo...@in.ibm.com> - 2016-09-02 02:12:45 == Upstream commit : commit a9cbf0b2195b695cbeeeecaa4e2770948c212e9a Author: Mukesh Ojha <mukes...@linux.vnet.ibm.com> Date: Mon Aug 22 12:17:44 2016 +0530 powerpc/powernv : Drop reference added by kset_find_obj() In a situation, where Linux kernel gets notified about duplicate error log from OPAL, it is been observed that kernel fails to remove sysfs entries (/sys/firmware/opal/elog/0xXXXXXXXX) of such error logs. This is because, we currently search the error log/dump kobject in the kset list via 'kset_find_obj()' routine. Which eventually increment the reference count by one, once it founds the kobject. Above patch is the solution of this bugzilla. Kindly pull this patch in for both Ubuntu 16.04 LTS and Ubuntu 16.10. -Mukesh To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1619552/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
