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[SRU justification]
This represent a hardware enablement SRU : Firmware assisted dumps (fadump) are
not possible on LTS.
[Impact]
The fadump mechanism cannot be used on Power systems running Trusty
[Fix]
Backport fadump functionality from makedumpfile 1.5.8 present in Wily and
onward.
[Test Case]
See comment #9 : The proposed SRU has been tested from a PPA on a Power VM.
[Regression]
None expected from a functionality point of view as it is a new feature.
Existing code paths are minimally modified.
[Original description of the problem]
---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) In order to use Firmware Assisted Dump feature update the kernel command
with fadump=on.
4) Reboot.
Post reboot using kdump-config load command fails with following message
:
# kdump-config load
Memory for crashkernel is not reserved
Please reserve memory by passing"crashkernel=X@Y" parameter to kernel
Then try to loading kdump kernel
* failed to load kdump kernel
# kdump-config status
current state : Not ready to kdump
#
# cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinux-3.19.0-18-generic
root=UUID=3ea23bcf-7269-432f-bacc-f82c6cdd774e ro splash quiet fadump=on
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
vt.handoff=7
# cat /sys/kernel/fadump_enabled
1
# cat /sys/kernel/fadump_registered
0
#
# dmesg | grep -i Firmware
[ 0.000000] Reserved 5120MB of memory at 97279MB for firmware-assisted dump
[ 0.000000] firmware_features = 0x00000001c45ffc5f
#
# cat /boot/config-3.19.0-18-generic | grep -i FA_DUMP
CONFIG_FA_DUMP=y
#
Are there any user space fixes missing which prevents me from
configuring firmware assisted dump ?
== Comment: #4 - Hari Krishna Bathini <hbath...@in.ibm.com> - 2015-06-12
05:28:24 ==
This patch makes kdump-tools fadump aware so as to switch between
kdump & fadump seemlessly based on the dump method enabled (fadump/kdump).
Thanks
Hari
** Affects: makedumpfile (Ubuntu)
Importance: Undecided
Status: New
** Affects: makedumpfile (Ubuntu Trusty)
Importance: High
Assignee: Louis Bouchard (louis-bouchard)
Status: In Progress
** Tags: architecture-ppc64le bot-comment bugnameltc-125884 patch
severity-critical targetmilestone-inin14044
--
Unable to configure Firmware Assisted dump
https://bugs.launchpad.net/bugs/1464833
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