** Changed in: ubuntu-power-systems
Status: Triaged => In Progress
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https://bugs.launchpad.net/bugs/1758206
Title:
Ubuntu 18.04 [ WSP DD2.2 with stop4 and stop5 enabled ]: kdump fails
to capture dump when smt=2 or off.
Status in The Ubuntu-power-systems project:
In Progress
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Bionic:
In Progress
Bug description:
---Problem Description---
Ubuntu 18.04 [ WSP DD2.2 with stop4 and stop5 enabled ]: kdump fails
to capture dump when smt=2 or off.
---Environment--
Kernel Build: 4.15.0-13-generic
System Name : ltc-wspoon4
Model/Type : P9
Platform : BML
---Steps to reproduce--
1. Configure kdump.
2. Set smt=off
# ppc64_cpu --smt=off
3. trigger crash.
echo 1 > /proc/sys/kernel/sysrq
echo "c" > /proc/sysrq-trigger
---Logs----
root@ltc-wspoon4:~# dpkg -l|grep kexec
ii kexec-tools 1:2.0.16-1ubuntu1
ppc64el tools to support fast kexec reboots
root@ltc-wspoon4:~# makedumpfile -v
makedumpfile: version 1.6.3 (released on 29 Jun 2018)
lzo enabled
snappy disabled
[ 285.519832] [c000001fe2d83de0] [c0000000003d1898] SyS_write+0x68/0x110
[ 285.519926] [c000001fe2d83e30] [c00000000000b184] system_call+0x58/0x6c
[ 285.520007] Instruction dump:
[ 285.520053] 4bfff9f1 4bfffe50 3c4c00f0 3842e800 7c0802a6 60000000 39200001
3d42001c
[ 285.520158] 394a6db0 912a0000 7c0004ac 39400000 <992a0000> 4e800020
3c4c00f0 3842e7d0
[ 285.520261] ---[ end trace 90a666dc7ca6f0ec ]---
[ 286.525787]
[ 286.525883] Sending IPI to other CPUs
[ 28[ 401.296284048,5] OPAL: Switch to big-endian OS
[ 402.297026662,3] OPAL: CPU 0x1 not in OPAL !
6.851284] IPI complete
[ 403.455520784,3] OPAL: CPU 0x1 not in OPAL !nce.
[ 403.455569636,5] OPAL: Switch to little-endian OS
[ 404.455711332,3] OPAL: CPU 0x1 not in OPAL !
[ 404.470276386,3] PHB#0000[0:0]: CRESET: Unexpected slot state 00000102,
resetting...
[ 413.140065625,3] PHB#0003[0:3]: CRESET: Unexpected slot state 00000102,
resetting...
[ 421.393193605,3] PHB#0030[8:0]: CRESET: Unexpected slot state 00000102,
resetting...
[ 423.353977316,3] PHB#0033[8:3]: CRESET: Unexpected slot state 00000102,
resetting...
[ 425.314547966,3] PHB#0034[8:4]: CRESET: Unexpected slot state 00000102,
resetting...
[ 5.004718] Processor 1 is stuck.
[ 10.007584] Processor 2 is stuck.
[ 15.010425] Processor 3 is stuck.
[ 16.135550] integrity: Unable to open file: /etc/keys/x509_ima.der (-2)
[ 16.135554] integrity: Unable to open file: /etc/keys/x509_evm.der (-2)
[ 16.250952] vio vio: uevent: failed to send synthetic uevent
--== Welcome to Hostboot hostboot-5fc3b52/hbicore.bin ==--
4.52180|secure|SecureROM valid - enabling functionality
4.53193|secure|Booting in non-secure mode.
6.00924|Booting from SBE side 0 on master proc=00050000
There could be a firmware issue there but still there is need for the below
kernel
patches to be included to ensure kdump kernel captures dump successfully
when SMT is set to 2/off
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=04b9c96eae72d862726f2f4bfcec2078240c33c5
("powerpc/crash: Remove the test for cpu_online in the IPI callback")
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4145f358644b970fcff293c09fdcc7939e8527d2
("powernv/kdump: Fix cases where the kdump kernel can get HMI's")
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=910961754572a2f4c83ad7e610d180
("powerpc/kdump: Fix powernv build break when KEXEC_CORE=n")
Thanks
Hari
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