------- Comment From ss...@in.ibm.com 2015-07-16 05:33 EDT------- Tested with latest kexec-tools. Works correctly.
root@alp9:~# dpkg --list | grep kexec-tools ii kexec-tools 1:2.0.6-0ubuntu2.2 ppc64el tools to support fast kexec reboots root@alp9:~# service kdump-tools start Modified cmdline:BOOT_IMAGE=/boot/vmlinux-3.19.0-18-generic root=UUID=3ea23bcf-7269-432f-bacc-f82c6cdd774e ro splash quiet vt.handoff=7 irqpoll maxcpus=1 nousb elfcorehdr=155200K segment[0].mem:0x8000000 memsz:24641536 segment[1].mem:0x9780000 memsz:65536 segment[2].mem:0x9790000 memsz:65536 segment[3].mem:0x97a0000 memsz:65536 segment[4].mem:0x97b0000 memsz:20971520 segment[5].mem:0xec80000 memsz:196608 * loaded kdump kernel kdump-tools stop/waiting root@alp9:~# kdump-config load Modified cmdline:BOOT_IMAGE=/boot/vmlinux-3.19.0-18-generic root=UUID=3ea23bcf-7269-432f-bacc-f82c6cdd774e ro splash quiet vt.handoff=7 irqpoll maxcpus=1 nousb elfcorehdr=155200K segment[0].mem:0x8000000 memsz:24641536 segment[1].mem:0x9780000 memsz:65536 segment[2].mem:0x9790000 memsz:65536 segment[3].mem:0x97a0000 memsz:65536 segment[4].mem:0x97b0000 memsz:20971520 segment[5].mem:0xec80000 memsz:196608 * loaded kdump kernel root@alp9:~# -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to kexec-tools in Ubuntu. https://bugs.launchpad.net/bugs/1461078 Title: kdump service fails to start on Power8 Status in kexec-tools package in Ubuntu: Fix Released Status in kexec-tools source package in Trusty: Fix Committed Bug description: [SRU justification] Needed to avoid load failure on Power8 [Impact] Without this fix, kexec will not load on Power8 [Fix] Apply upstream fix present in Dev release [Test Case] 1) sudo apt-get install linux-crashdump 2) reboot server 3) kdump-config load As outlined in the initial description, kdump will fail to load without the fix. [Regression] None expected, fix is already present in the development version (Wily) [Original description of the problem] == Comment: #0 - SACHIN P. SANT <ss...@in.ibm.com> - 2015-06-01 06:39:56 == ---Problem Description--- kdump service fails to start Contact Information = Sachin Sant / ss...@in.ibm.com ---uname output--- 3.19.0-18-generic Machine Type = POWER8 ---Debugger--- A debugger is not configured ---Steps to Reproduce--- 1) Using latest daily ISO install 14.04.02 as a Power VM guest 2) Upgrade the kernel to 3.19 level (3.19.0-18-generic) 3) Configure kdump kdump-config load command fails with following error: root@alp9:~# cat /proc/cmdline BOOT_IMAGE=/boot/vmlinux-3.19.0-18-generic root=UUID=3ea23bcf-7269-432f-bacc-f82c6cdd774e ro splash crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M vt.handoff=7 root@alp9:~# kdump-config show USE_KDUMP: 1 KDUMP_SYSCTL: kernel.panic_on_oops=1 KDUMP_COREDIR: /var/crash crashkernel addr: current state: Not ready to kdump kexec command: no kexec command recorded root@alp9:~# kdump-config load unrecoverable error: short read from"/proc/device-tree//ibm,drc-names" * failed to load kdump kernel root@alp9:~# Userspace tool common name: kexec-tools The userspace tool has the following bit modes: 64-bit Userspace rpm: kdump-tools(1.5.5-2ubuntu1.2) Userspace tool obtained from project website: na *Additional Instructions for Sachin Sant / ss...@in.ibm.com: -Post a private note with access information to the machine that the bug is occuring on. -Attach ltrace and strace of userspace application. == Comment: #2 - MAMATHA INAMDAR <mainam...@in.ibm.com> - 2015-06-02 02:23:51 == root@alp9:~# /etc/init.d/kdump-tools start Starting kdump-tools: unrecoverable error: short read from"/proc/device-tree//ibm,drc-names" * failed to load kdump kernel root@alp9:~# dpkg -l | grep kexec ii kexec-tools 1:2.0.6-0ubuntu2.1 ppc64el tools to support fast kexec reboots root@alp9:~# dpkg -l | grep kdump ii kdump-tools 1.5.5-2ubuntu1.2 all scripts and tools for automating kdump (Linux crash dumps) root@alp9:~# cat /sys/kernel/kexec_crash_loaded 0 root@alp9:~# kdump-config status current state : Not ready to kdump root@alp9:~# dmesg | grep -i crash [ 0.000000] Reserving 2048MB of memory at 128MB for crashkernel (System RAM: 102400MB) [ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinux-3.19.0-18-generic root=UUID=3ea23bcf-7269-432f-bacc-f82c6cdd774e ro splash crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M vt.handoff=7 root@alp9:~# == Comment: #3 - Hari Krishna Bathini <hbath...@in.ibm.com> - 2015-06-02 07:29:23 == The following upstream commit fixes this issue: --- commit d1932cd592e2a6aaf50ed22cfa2d7562b583854a Author: Anton Blanchard <an...@samba.org> Date: Tue Dec 2 10:59:40 2014 +1100 kexec/fs2dt: Use slurp_file_len to avoid partial read of files The OPAL firmware is going to embed its symbol map in the device tree. The size is large enough to be more than a page, and it takes multiple reads to get the whole file. This is because sysfs uses the seq_file helpers which do a page at a time. Unfortunately fs2dt has no handling for short reads and we die with: unrecoverable error: short read from"/proc/device- tree//ibm,opal/firmware/symbol-map" This patch uses the slurp_file_len helper which does the right thing. It moves the explicit open of the file further down for add_usable_mem_property and add_dyn_reconf_usable_mem_property. We should convert both of these to use the buffer provided by slurp_file_len at some stage. Signed-off-by: Anton Blanchard <an...@samba.org> Signed-off-by: Simon Horman <ho...@verge.net.au> --- This patch applies cleanly on the kexec-tools version 1:2.0.6-0ubuntu2.1 on Ubuntu 14.04.2. Thanks Hari To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kexec-tools/+bug/1461078/+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
