Public bug reported:
== 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
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: architecture-ppc64le bugnameltc-125712 severity-critical
targetmilestone-inin---
** Tags added: architecture-ppc64le bugnameltc-125712 severity-critical
targetmilestone-inin---
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https://bugs.launchpad.net/bugs/1461078
Title:
kdump service fails to start
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