kernel-packages team mailing list archive
-
kernel-packages team
-
Mailing list archive
-
Message #161565
[Bug 1481357] Comment bridged from LTC Bugzilla
------- Comment From satheera@xxxxxxxxxx 2016-02-18 03:18 EDT-------
Provided 3.19.0-50-generic linux kernel image is not bootable in my machine, as it does not have the ipr module in initramfs, hence failing to find the root disk.
Steps:
1. Installed 3.19.0-50-generic kernel
2. reboot, choose the above kernel/ kexec to the above kernel
----> both result in below error
Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.
Gave up waiting for root device. Common problems:
- Boot args (cat /proc/cmdline)
- Check rootdelay= (did the system wait long enough?)
- Check root= (did the system wait for the right device?)
- Missing modules (cat /proc/modules; ls /dev)
ALERT! /dev/disk/by-uuid/1e999814-80ae-4ef9-89a0-c7fda8d968c5 does not exist. Dropping to a shell!
BusyBox v1.21.1 (Ubuntu 1:1.21.0-1ubuntu1) built-in shell (ash)
Enter 'help' for a list of built-in commands.
(initramfs)
3. Tried boot back to 4.2 kernel, it is working fine
4. extracted and compared the initramfs content and found 4.2 kernel has ipr in modules.dep whereas 3.19.0-50-generic does not have.
Pls provide updated kernel image to proceed with tests.
Thanks inadvance.
output of extracted initramfs
????
# grep -r ipr 4.2/*
Binary file 4.2/bin/busybox matches
Binary file 4.2/initrd.img-4.2.0-27-generic matches
Binary file 4.2/initrd.img-4.2.0-27-generic.bk matches
Binary file 4.2/lib/powerpc64le-linux-gnu/libtinfo.so.5 matches
Binary file 4.2/lib/powerpc64le-linux-gnu/libc.so.6 matches
4.2/lib/modules/4.2.0-27-generic/modules.dep:kernel/drivers/scsi/ipr.ko:
Binary file 4.2/lib/modules/4.2.0-27-generic/modules.dep.bin matches
4.2/lib/modules/4.2.0-27-generic/modules.alias:alias pci:v00001014d0000034Asv00001014sd000004C9bc*sc*i* ipr
...
4.2/lib/modules/4.2.0-27-generic/modules.alias:alias pci:v00001069d0000B166sv00001014sd00000266bc*sc*i* ipr
Binary file 4.2/lib/modules/4.2.0-27-generic/kernel/drivers/scsi/megaraid/megaraid_sas.ko matches
Binary file 4.2/lib/modules/4.2.0-27-generic/kernel/drivers/scsi/libsas/libsas.ko matches
Binary file 4.2/lib/modules/4.2.0-27-generic/kernel/drivers/scsi/ipr.ko matches
Binary file 4.2/lib/modules/4.2.0-27-generic/kernel/drivers/net/ethernet/jme.ko matches
4.2/lib/modules/4.2.0-27-generic/modules.order:kernel/drivers/scsi/ipr.ko
4.2/lib/modules/4.2.0-27-generic/modules.order:kernel/drivers/mtd/chips/chipreg.ko
4.2/lib/modules/4.2.0-27-generic/modules.order:kernel/net/netfilter/xt_iprange.ko
Binary file 4.2/lib/modules/4.2.0-27-generic/modules.alias.bin matches
?????
# grep -r ipr 3.19/*
Binary file 3.19/bin/busybox matches
Binary file 3.19/initrd.img-3.19.0-50-generic matches
Binary file 3.19/lib/powerpc64le-linux-gnu/libtinfo.so.5 matches
Binary file 3.19/lib/powerpc64le-linux-gnu/libc.so.6 matches
Binary file 3.19/lib/modules/3.19.0-50-generic/kernel/drivers/scsi/libsas/libsas.ko matches
3.19/lib/modules/3.19.0-50-generic/modules.order:kernel/drivers/scsi/ipr.ko
3.19/lib/modules/3.19.0-50-generic/modules.order:kernel/drivers/mtd/chips/chipreg.ko
3.19/lib/modules/3.19.0-50-generic/modules.order:kernel/net/netfilter/xt_iprange.ko
#lsscsi
...
[1:2:0:0] disk IBM IPR-0 5EC29900 /dev/sdc
[1:2:1:0] disk IBM IPR-0 5EC2A800 /dev/sdd
Regards,
-Satheesh.
--
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/1481357
Title:
[LTCTest][Kernel][OP810]Ubuntu14.04.3: kernel call trace while
continuously switching between smt on/off and changing subcores
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Vivid:
Fix Committed
Status in linux source package in Wily:
Fix Released
Status in linux source package in Xenial:
Fix Released
Bug description:
== Comment: #0 - Satheesh Rajendran <satheera@xxxxxxxxxx> - 2015-07-14 02:32:22 ==
While running the below script, and nothing else was running in the system, host got the kernel call traces after around 15~20 mins
#!/bin/bash -x
while true;
do for i in 1 2 4;
do ppc64_cpu --subcores-per-core=$i;
ppc64_cpu --info
ppc64_cpu --smt=off;
ppc64_cpu --info
sleep 1;
lscpu
ppc64_cpu --smt=on;
ppc64_cpu --info
sleep 1;
lscpu
done;
sleep 1;
done
Environment:
------------------
$ cat /etc/issue
Ubuntu 14.04.2 LTS \n \l
$ uname -a
Linux tul8fp 3.19.0-22-generic #22~14.04.1-Ubuntu SMP Wed Jun 17 10:03:39 UTC 2015 ppc64le ppc64le ppc64le GNU/Linux
$ lscpu
Architecture: ppc64le
Byte Order: Little Endian
CPU(s): 160
On-line CPU(s) list: 0,4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68,72,76,80,84,88,92,96,100,104,108,112,116,120,124,128,132,136,138-159
Off-line CPU(s) list: 1-3,5-7,9-11,13-15,17-19,21-23,25-27,29-31,33-35,37-39,41-43,45-47,49-51,53-55,57-59,61-63,65-67,69-71,73-75,77-79,81-83,85-87,89-91,93-95,97-99,101-103,105-107,109-111,113-115,117-119,121-123,125-127,129-131,133-135,137
Thread(s) per core: 2
Core(s) per socket: 10
Socket(s): 2
NUMA node(s): 2
Model: 8335-GTA
L1d cache: 64K
L1i cache: 32K
L2 cache: 512K
L3 cache: 8192K
NUMA node0 CPU(s): 0,4,88,92,96,100,104,108,112,116,120,124,128,132,136,138-159
NUMA node8 CPU(s): 8,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68,72,76,80,84
$ tail -10 /proc/cpuinfo
processor : 159
cpu : POWER8 (raw), altivec supported
clock : 2693.000000MHz
revision : 2.0 (pvr 004d 0200)
timebase : 512000000
platform : PowerNV
model : 8335-GTA
machine : PowerNV 8335-GTA
firmware : OPAL v3
Logs:-
---------
# dmesg
[79081.074088] INFO: task irqbalance:1897 blocked for more than 120 seconds.
[79081.074333] Not tainted 3.19.0-22-generic #22~14.04.1-Ubuntu
[79081.074388] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[79081.074449] irqbalance D 00003fff9ac39d3c 0 1897 1 0x00040000
[79081.074454] Call Trace:
[79081.074470] [c0000007e8d035f0] [00003fff9af50000] 0x3fff9af50000 (unreliable)
[79081.074477] [c0000007e8d037c0] [c000000000015934] __switch_to+0x204/0x350
[79081.074482] [c0000007e8d03820] [c000000000a11508] __schedule+0x368/0x8d0
[79081.074486] --- interrupt: 1000ba30 at 0xc0000007e8d039f0
[79081.074486] LR = 0x10026a6c1d0
[79081.074490] [c0000007e8d03a40] [c000000000a120a0] schedule_preempt_disabled+0x20/0x30 (unreliable)
[79081.074494] [c0000007e8d03a60] [c000000000a1420c] __mutex_lock_slowpath+0xfc/0x1f0
[79081.074497] [c0000007e8d03ae0] [c000000000a1436c] mutex_lock+0x6c/0x70
[79081.074501] [c0000007e8d03b10] [c00000000064488c] online_show+0x3c/0x90
[79081.074503] [c0000007e8d03b90] [c000000000644fec] dev_attr_show+0x5c/0xc0
[79081.074508] [c0000007e8d03bd0] [c00000000035b7f4] sysfs_kf_seq_show+0x114/0x200
[79081.074511] [c0000007e8d03c20] [c0000000003591e4] kernfs_seq_show+0x54/0x70
[79081.074515] [c0000007e8d03c50] [c0000000002e74fc] seq_read+0xec/0x500
[79081.074519] [c0000007e8d03cf0] [c00000000035a474] kernfs_fop_read+0x184/0x220
[79081.074523] [c0000007e8d03d50] [c0000000002b520c] __vfs_read+0x6c/0x120
[79081.074527] [c0000007e8d03d90] [c0000000002b5364] vfs_read+0xa4/0x1c0
[79081.074530] [c0000007e8d03de0] [c0000000002b54ec] SyS_read+0x6c/0x110
[79081.074534] [c0000007e8d03e30] [c000000000009258] system_call+0x38/0xd0
[79081.074546] INFO: task ppc64_cpu:111047 blocked for more than 120 seconds.
[79081.074597] Not tainted 3.19.0-22-generic #22~14.04.1-Ubuntu
[79081.074802] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[79081.074865] ppc64_cpu D 00003fff82892d08 0 111047 109995 0x00040000
[79081.074868] Call Trace:
[79081.074871] [c000000f1c67f680] [c000000f1c67f710] 0xc000000f1c67f710 (unreliable)
[79081.074875] [c000000f1c67f850] [c000000000015934] __switch_to+0x204/0x350
[79081.074878] [c000000f1c67f8b0] [c000000000a11508] __schedule+0x368/0x8d0
[79081.074882] [c000000f1c67fad0] [c0000000000aff10] cpu_hotplug_begin+0xa0/0xb0
[79081.074887] [c000000f1c67fb10] [c00000000020b0a0] _cpu_down+0xb0/0x3a0
[79081.074890] [c000000f1c67fbd0] [c00000000020b3e8] cpu_down+0x58/0xa0
[79081.074894] [c000000f1c67fc00] [c00000000064fa0c] cpu_subsys_offline+0x2c/0x50
[79081.074897] [c000000f1c67fc30] [c000000000647aa4] device_offline+0x104/0x140
[79081.074900] [c000000f1c67fc70] [c000000000647c6c] online_store+0x6c/0xc0
[79081.074904] [c000000f1c67fcc0] [c000000000643ab8] dev_attr_store+0x68/0xa0
[79081.074907] [c000000f1c67fd00] [c00000000035b350] sysfs_kf_write+0x80/0xb0
[79081.074910] [c000000f1c67fd40] [c00000000035a28c] kernfs_fop_write+0x18c/0x1f0
[79081.074914] [c000000f1c67fd90] [c0000000002b474c] vfs_write+0xdc/0x260
[79081.074917] [c000000f1c67fde0] [c0000000002b55fc] SyS_write+0x6c/0x110
[79081.074921] [c000000f1c67fe30] [c000000000009258] system_call+0x38/0xd0
[79201.074065] INFO: task irqbalance:1897 blocked for more than 120 seconds.
[79201.074312] Not tainted 3.19.0-22-generic #22~14.04.1-Ubuntu
[79201.074361] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[79201.074421] irqbalance D 00003fff9ac39d3c 0 1897 1 0x00040000
[79201.074424] Call Trace:
[79201.074428] [c0000007e8d035f0] [00003fff9af50000] 0x3fff9af50000 (unreliable)
[79201.074432] [c0000007e8d037c0] [c000000000015934] __switch_to+0x204/0x350
[79201.074436] [c0000007e8d03820] [c000000000a11508] __schedule+0x368/0x8d0
[79201.074439] --- interrupt: 1000ba30 at 0xc0000007e8d039f0
[79201.074439] LR = 0x10026a6c1d0
[79201.074443] [c0000007e8d03a40] [c000000000a120a0] schedule_preempt_disabled+0x20/0x30 (unreliable)
[79201.074447] [c0000007e8d03a60] [c000000000a1420c] __mutex_lock_slowpath+0xfc/0x1f0
[79201.074450] [c0000007e8d03ae0] [c000000000a1436c] mutex_lock+0x6c/0x70
[79201.074453] [c0000007e8d03b10] [c00000000064488c] online_show+0x3c/0x90
[79201.074456] [c0000007e8d03b90] [c000000000644fec] dev_attr_show+0x5c/0xc0
[79201.074459] [c0000007e8d03bd0] [c00000000035b7f4] sysfs_kf_seq_show+0x114/0x200
[79201.074462] [c0000007e8d03c20] [c0000000003591e4] kernfs_seq_show+0x54/0x70
[79201.074465] [c0000007e8d03c50] [c0000000002e74fc] seq_read+0xec/0x500
[79201.074468] [c0000007e8d03cf0] [c00000000035a474] kernfs_fop_read+0x184/0x220
[79201.074472] [c0000007e8d03d50] [c0000000002b520c] __vfs_read+0x6c/0x120
[79201.074475] [c0000007e8d03d90] [c0000000002b5364] vfs_read+0xa4/0x1c0
[79201.074479] [c0000007e8d03de0] [c0000000002b54ec] SyS_read+0x6c/0x110
[79201.074482] [c0000007e8d03e30] [c000000000009258] system_call+0x38/0xd0
[79201.074499] INFO: task ppc64_cpu:111047 blocked for more than 120 seconds.
[79201.074638] Not tainted 3.19.0-22-generic #22~14.04.1-Ubuntu
[79201.074726] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[79201.074786] ppc64_cpu D 00003fff82892d08 0 111047 109995 0x00040000
[79201.074789] Call Trace:
[79201.074792] [c000000f1c67f680] [c000000f1c67f710] 0xc000000f1c67f710 (unreliable)
[79201.074795] [c000000f1c67f850] [c000000000015934] __switch_to+0x204/0x350
[79201.074798] [c000000f1c67f8b0] [c000000000a11508] __schedule+0x368/0x8d0
[79201.074802] [c000000f1c67fad0] [c0000000000aff10] cpu_hotplug_begin+0xa0/0xb0
[79201.074805] [c000000f1c67fb10] [c00000000020b0a0] _cpu_down+0xb0/0x3a0
[79201.074808] [c000000f1c67fbd0] [c00000000020b3e8] cpu_down+0x58/0xa0
[79201.074811] [c000000f1c67fc00] [c00000000064fa0c] cpu_subsys_offline+0x2c/0x50
[79201.074814] [c000000f1c67fc30] [c000000000647aa4] device_offline+0x104/0x140
[79201.074817] [c000000f1c67fc70] [c000000000647c6c] online_store+0x6c/0xc0
[79201.074821] [c000000f1c67fcc0] [c000000000643ab8] dev_attr_store+0x68/0xa0
[79201.074824] [c000000f1c67fd00] [c00000000035b350] sysfs_kf_write+0x80/0xb0
[79201.074827] [c000000f1c67fd40] [c00000000035a28c] kernfs_fop_write+0x18c/0x1f0
[79201.074831] [c000000f1c67fd90] [c0000000002b474c] vfs_write+0xdc/0x260
[79201.074834] [c000000f1c67fde0] [c0000000002b55fc] SyS_write+0x6c/0x110
[79201.074837] [c000000f1c67fe30] [c000000000009258] system_call+0x38/0xd0
[79321.074029] INFO: task irqbalance:1897 blocked for more than 120 seconds.
[79321.074269] Not tainted 3.19.0-22-generic #22~14.04.1-Ubuntu
[79321.074319] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[79321.074378] irqbalance D 00003fff9ac39d3c 0 1897 1 0x00040000
[79321.074382] Call Trace:
[79321.074386] [c0000007e8d035f0] [00003fff9af50000] 0x3fff9af50000 (unreliable)
[79321.074390] [c0000007e8d037c0] [c000000000015934] __switch_to+0x204/0x350
[79321.074393] [c0000007e8d03820] [c000000000a11508] __schedule+0x368/0x8d0
[79321.074396] --- interrupt: 1000ba30 at 0xc0000007e8d039f0
[79321.074396] LR = 0x10026a6c1d0
[79321.074400] [c0000007e8d03a40] [c000000000a120a0] schedule_preempt_disabled+0x20/0x30 (unreliable)
[79321.074404] [c0000007e8d03a60] [c000000000a1420c] __mutex_lock_slowpath+0xfc/0x1f0
[79321.074407] [c0000007e8d03ae0] [c000000000a1436c] mutex_lock+0x6c/0x70
[79321.074410] [c0000007e8d03b10] [c00000000064488c] online_show+0x3c/0x90
[79321.074412] [c0000007e8d03b90] [c000000000644fec] dev_attr_show+0x5c/0xc0
[79321.074416] [c0000007e8d03bd0] [c00000000035b7f4] sysfs_kf_seq_show+0x114/0x200
[79321.074419] [c0000007e8d03c20] [c0000000003591e4] kernfs_seq_show+0x54/0x70
[79321.074422] [c0000007e8d03c50] [c0000000002e74fc] seq_read+0xec/0x500
[79321.074425] [c0000007e8d03cf0] [c00000000035a474] kernfs_fop_read+0x184/0x220
[79321.074429] [c0000007e8d03d50] [c0000000002b520c] __vfs_read+0x6c/0x120
[79321.074432] [c0000007e8d03d90] [c0000000002b5364] vfs_read+0xa4/0x1c0
[79321.074436] [c0000007e8d03de0] [c0000000002b54ec] SyS_read+0x6c/0x110
[79321.074439] [c0000007e8d03e30] [c000000000009258] system_call+0x38/0xd0
[79321.074453] INFO: task ppc64_cpu:111047 blocked for more than 120 seconds.
== Comment: #1 - Satheesh Rajendran <satheera@xxxxxxxxxx> - 2015-07-14 02:34:55 ==
Tried to get sosreport but the same got stuck during info gathering at processor.
# sosreport
...
Please enter your first initial and last name [tul8fp]: satheesh
Please enter the case number that you are generating this report for: trace
Running plugins. Please wait ...
Running 51/64: processor...
== Comment: #3 - Ranjal G. Shenoy <ranjshen@xxxxxxxxxx> - 2015-07-14 05:18:17 ==
Hi Sandhya,
From the call trace it looks like ppc64_task which is trying to
offline a cpu is blocked inside cpu_hotplug_begin(). This happens when
someone else is trying to prevent a cpu-hotplug using the
get_online_cpus()/put_online_cpus() call. It is not clear from the
logs what is that entity that's preventing this.
That said, I don't think the patch that you are referring to has
anything to do with it. The problem lies elsewhere. If you see that
the ppc64_cpu task is not making any progress at all, then it might be
prudent to enable lockdep which will at least list out all the locks
that are held at any point.
== Comment: #4 - Ranjal G. Shenoy <ranjshen@xxxxxxxxxx> - 2015-07-14 05:48:39 ==
(In reply to comment #3)
> Hi Sandhya,
>
> From the call trace it looks like ppc64_task which is trying to offline a
> cpu is blocked inside cpu_hotplug_begin(). This happens when someone else is
> trying to prevent a cpu-hotplug using the
> get_online_cpus()/put_online_cpus() call. It is not clear from the logs what
> is that entity that's preventing this.
>
> That said, I don't think the patch that you are referring to has anything
> to do with it. The problem lies elsewhere. If you see that the ppc64_cpu
> task is not making any progress at all, then it might be prudent to enable
> lockdep which will at least list out all the locks that are held at any
> point.
To add to that, I recall seeing a similar issue where cpu-offline
operation was blocking inside cpu_hotplug_begin. The fix for that is
present in the mainline with commit id : 87af9e7ff9. You can try
backporting that one.
== Comment: #13 - Satheesh Rajendran <satheera@xxxxxxxxxx> - 2015-07-27 12:06:19 ==
Ran script mentioned in bug description continuously for 6 hours and not have seen the mentioned call traces.
Once this fix is available as part of ubuntu14.04.3 released kernel,
this bug can be closed.
Thanks in advance.
Regards,
-Satheesh.
== Comment: #14 - Brahadambal Srinivasan <brsriniv@xxxxxxxxxx> - 2015-08-04 09:31:21 ==
Cherry picked bug backported to the trusty kernel to resolve the issue reported in this bug
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1481357/+subscriptions
