How can I detect whether an “NMI watchdog: BUG: soft lockup” is a hardware or a software issue?
Soft Lockup
dmesg reports in my laptop, since quite some time now, NMI watchdog: BUG: soft lockup every time I try to use updatedb or firefox. Samples of what is reported posted at https://github.com/zfsonlinux/zfs/issues/4536#issuecomment-280894134.
Related questions are
- What is a CPU soft lockup?
- What does "kernel:NMI watchdog: BUG: soft lockup" followed by other errors mean?
- Kernel Crash/ Cpu error?
I have also read/commented at
- https://github.com/zfsonlinux/zfs/issues/4536
Question
How can I detect whether it's a hardware issue or, as I think, confirm it's an issue related to the kernel/software?
Details
Linux Distribution
Funtoo-Linux, a rolling distribution
Kernels
I have (at least) observed the "BUG" while using the following kernel(s) versions:
pf
- 4.11_p4-pf
- 4.8_p8
- 4.5_p4
ck
- 4.12.7-ck
debian
- lts-4.9.30
- 4.8.x
- 4.7.8
Configuration
I use a custom configuration to compile the kernel. It's mostly the same configuration I use(d) for long time, when there was no "soft lockup" problem or whatsoever related to a "watchdog".
I can copy-paste or link the configuration file. However, two important settings I have found else to be "required"
CONFIG_KALLSYMS=y
CONFIG_PREEMPT_NONE=y
ZFS
I observed the "BUG" while using ZoL versions
- 0.6.5.11
- 0.6.5.10
- 0.6.5.9
- 0.6.5.8
- 0.6.5.3
linux-kernel zfs bugs
edited 14 mins ago
Pang
12715
asked Aug 25 '17 at 8:56
Nikos AlexandrisNikos Alexandris
7862936
|
show 3 more comments
Soft Lockup
dmesg reports in my laptop, since quite some time now, NMI watchdog: BUG: soft lockup every time I try to use updatedb or firefox. Samples of what is reported posted at https://github.com/zfsonlinux/zfs/issues/4536#issuecomment-280894134.
Related questions are
- What is a CPU soft lockup?
- What does "kernel:NMI watchdog: BUG: soft lockup" followed by other errors mean?
- Kernel Crash/ Cpu error?
I have also read/commented at
- https://github.com/zfsonlinux/zfs/issues/4536
Question
How can I detect whether it's a hardware issue or, as I think, confirm it's an issue related to the kernel/software?
Details
Linux Distribution
Funtoo-Linux, a rolling distribution
Kernels
I have (at least) observed the "BUG" while using the following kernel(s) versions:
pf
- 4.11_p4-pf
- 4.8_p8
- 4.5_p4
ck
- 4.12.7-ck
debian
- lts-4.9.30
- 4.8.x
- 4.7.8
Configuration
I use a custom configuration to compile the kernel. It's mostly the same configuration I use(d) for long time, when there was no "soft lockup" problem or whatsoever related to a "watchdog".
I can copy-paste or link the configuration file. However, two important settings I have found else to be "required"
CONFIG_KALLSYMS=y
CONFIG_PREEMPT_NONE=y
ZFS
I observed the "BUG" while using ZoL versions
- 0.6.5.11
- 0.6.5.10
- 0.6.5.9
- 0.6.5.8
- 0.6.5.3
linux-kernel zfs bugs
edited 14 mins ago
Pang
12715
asked Aug 25 '17 at 8:56
Nikos AlexandrisNikos Alexandris
7862936
NMI by definition is a hw interrupt; it manifesting itself only on those two programs, could it be load related, have you tried other heavy I/O programs?
– Rui F Ribeiro
Aug 25 '17 at 8:59
1
@RuiFRibeiro The OP is not asking what NMI is but what caused the watchdog to be woken up (IOW what caused the kernel to be stuck)
– xhienne
Aug 25 '17 at 9:37
1
@RuiFRibeiro I really want to know whether my laptop needs a hardware service or if I am messing too much with my custom kernel configurations. But, yes, I got the "BUG" also once using a simplefindcommand that was finding too many files.
– Nikos Alexandris
Aug 25 '17 at 12:17
@RuiFRibeiro And if useful, I have tried (in the past) an Ubuntu-Live version. It did not cause the CPU to stale.
– Nikos Alexandris
Aug 25 '17 at 12:20
1
@RuiFRibeiro To learn and have fun with it in the beginning. Now because it's neat! See also funtoo.org/ZFS_Fun.
– Nikos Alexandris
Aug 25 '17 at 13:22
|
show 3 more comments
Soft Lockup
dmesg reports in my laptop, since quite some time now, NMI watchdog: BUG: soft lockup every time I try to use updatedb or firefox. Samples of what is reported posted at https://github.com/zfsonlinux/zfs/issues/4536#issuecomment-280894134.
Related questions are
- What is a CPU soft lockup?
- What does "kernel:NMI watchdog: BUG: soft lockup" followed by other errors mean?
- Kernel Crash/ Cpu error?
I have also read/commented at
- https://github.com/zfsonlinux/zfs/issues/4536
Question
How can I detect whether it's a hardware issue or, as I think, confirm it's an issue related to the kernel/software?
Details
Linux Distribution
Funtoo-Linux, a rolling distribution
Kernels
I have (at least) observed the "BUG" while using the following kernel(s) versions:
pf
- 4.11_p4-pf
- 4.8_p8
- 4.5_p4
ck
- 4.12.7-ck
debian
- lts-4.9.30
- 4.8.x
- 4.7.8
Configuration
I use a custom configuration to compile the kernel. It's mostly the same configuration I use(d) for long time, when there was no "soft lockup" problem or whatsoever related to a "watchdog".
I can copy-paste or link the configuration file. However, two important settings I have found else to be "required"
CONFIG_KALLSYMS=y
CONFIG_PREEMPT_NONE=y
ZFS
I observed the "BUG" while using ZoL versions
- 0.6.5.11
- 0.6.5.10
- 0.6.5.9
- 0.6.5.8
- 0.6.5.3
linux-kernel zfs bugs
edited 14 mins ago
Pang
12715
asked Aug 25 '17 at 8:56
Nikos AlexandrisNikos Alexandris
7862936
Soft Lockup
dmesg reports in my laptop, since quite some time now, NMI watchdog: BUG: soft lockup every time I try to use updatedb or firefox. Samples of what is reported posted at https://github.com/zfsonlinux/zfs/issues/4536#issuecomment-280894134.
Related questions are
- What is a CPU soft lockup?
- What does "kernel:NMI watchdog: BUG: soft lockup" followed by other errors mean?
- Kernel Crash/ Cpu error?
I have also read/commented at
- https://github.com/zfsonlinux/zfs/issues/4536
Question
How can I detect whether it's a hardware issue or, as I think, confirm it's an issue related to the kernel/software?
Details
Linux Distribution
Funtoo-Linux, a rolling distribution
Kernels
I have (at least) observed the "BUG" while using the following kernel(s) versions:
pf
- 4.11_p4-pf
- 4.8_p8
- 4.5_p4
ck
- 4.12.7-ck
debian
- lts-4.9.30
- 4.8.x
- 4.7.8
Configuration
I use a custom configuration to compile the kernel. It's mostly the same configuration I use(d) for long time, when there was no "soft lockup" problem or whatsoever related to a "watchdog".
I can copy-paste or link the configuration file. However, two important settings I have found else to be "required"
CONFIG_KALLSYMS=y
CONFIG_PREEMPT_NONE=y
ZFS
I observed the "BUG" while using ZoL versions
- 0.6.5.11
- 0.6.5.10
- 0.6.5.9
- 0.6.5.8
- 0.6.5.3
linux-kernel zfs bugs
linux-kernel zfs bugs
edited 14 mins ago
Pang
12715
asked Aug 25 '17 at 8:56
Nikos AlexandrisNikos Alexandris
7862936
edited 14 mins ago
Pang
12715
asked Aug 25 '17 at 8:56
Nikos AlexandrisNikos Alexandris
7862936
edited 14 mins ago
Pang
12715
edited 14 mins ago
Pang
12715
edited 14 mins ago
Pang
12715
12715
asked Aug 25 '17 at 8:56
Nikos AlexandrisNikos Alexandris
7862936
asked Aug 25 '17 at 8:56
Nikos AlexandrisNikos Alexandris
7862936
asked Aug 25 '17 at 8:56
Nikos AlexandrisNikos Alexandris
7862936
7862936
NMI by definition is a hw interrupt; it manifesting itself only on those two programs, could it be load related, have you tried other heavy I/O programs?
– Rui F Ribeiro
Aug 25 '17 at 8:59
1
@RuiFRibeiro The OP is not asking what NMI is but what caused the watchdog to be woken up (IOW what caused the kernel to be stuck)
– xhienne
Aug 25 '17 at 9:37
1
@RuiFRibeiro I really want to know whether my laptop needs a hardware service or if I am messing too much with my custom kernel configurations. But, yes, I got the "BUG" also once using a simplefindcommand that was finding too many files.
– Nikos Alexandris
Aug 25 '17 at 12:17
@RuiFRibeiro And if useful, I have tried (in the past) an Ubuntu-Live version. It did not cause the CPU to stale.
– Nikos Alexandris
Aug 25 '17 at 12:20
1
@RuiFRibeiro To learn and have fun with it in the beginning. Now because it's neat! See also funtoo.org/ZFS_Fun.
– Nikos Alexandris
Aug 25 '17 at 13:22
|
show 3 more comments
NMI by definition is a hw interrupt; it manifesting itself only on those two programs, could it be load related, have you tried other heavy I/O programs?
– Rui F Ribeiro
Aug 25 '17 at 8:59
1
@RuiFRibeiro The OP is not asking what NMI is but what caused the watchdog to be woken up (IOW what caused the kernel to be stuck)
– xhienne
Aug 25 '17 at 9:37
1
@RuiFRibeiro I really want to know whether my laptop needs a hardware service or if I am messing too much with my custom kernel configurations. But, yes, I got the "BUG" also once using a simplefindcommand that was finding too many files.
– Nikos Alexandris
Aug 25 '17 at 12:17
@RuiFRibeiro And if useful, I have tried (in the past) an Ubuntu-Live version. It did not cause the CPU to stale.
– Nikos Alexandris
Aug 25 '17 at 12:20
1
@RuiFRibeiro To learn and have fun with it in the beginning. Now because it's neat! See also funtoo.org/ZFS_Fun.
– Nikos Alexandris
Aug 25 '17 at 13:22
NMI by definition is a hw interrupt; it manifesting itself only on those two programs, could it be load related, have you tried other heavy I/O programs?
– Rui F Ribeiro
Aug 25 '17 at 8:59
NMI by definition is a hw interrupt; it manifesting itself only on those two programs, could it be load related, have you tried other heavy I/O programs?
– Rui F Ribeiro
Aug 25 '17 at 8:59
1
1
@RuiFRibeiro The OP is not asking what NMI is but what caused the watchdog to be woken up (IOW what caused the kernel to be stuck)
– xhienne
Aug 25 '17 at 9:37
@RuiFRibeiro The OP is not asking what NMI is but what caused the watchdog to be woken up (IOW what caused the kernel to be stuck)
– xhienne
Aug 25 '17 at 9:37
1
1
@RuiFRibeiro I really want to know whether my laptop needs a hardware service or if I am messing too much with my custom kernel configurations. But, yes, I got the "BUG" also once using a simple
find command that was finding too many files.– Nikos Alexandris
Aug 25 '17 at 12:17
@RuiFRibeiro I really want to know whether my laptop needs a hardware service or if I am messing too much with my custom kernel configurations. But, yes, I got the "BUG" also once using a simple
find command that was finding too many files.– Nikos Alexandris
Aug 25 '17 at 12:17
@RuiFRibeiro And if useful, I have tried (in the past) an Ubuntu-Live version. It did not cause the CPU to stale.
– Nikos Alexandris
Aug 25 '17 at 12:20
@RuiFRibeiro And if useful, I have tried (in the past) an Ubuntu-Live version. It did not cause the CPU to stale.
– Nikos Alexandris
Aug 25 '17 at 12:20
1
1
@RuiFRibeiro To learn and have fun with it in the beginning. Now because it's neat! See also funtoo.org/ZFS_Fun.
– Nikos Alexandris
Aug 25 '17 at 13:22
@RuiFRibeiro To learn and have fun with it in the beginning. Now because it's neat! See also funtoo.org/ZFS_Fun.
– Nikos Alexandris
Aug 25 '17 at 13:22
|
show 3 more comments
1 Answer
1
active
oldest
votes
Whilst it could be a hardware problem, however due to the code maturity of the ZFS code for Linux, and a whole slew of people complaining of your very same message in multiple versions, I am inclined to say that is a software bug.
There have been multiple bugs about race conditions in the ZFS code, and truth is that is not still entirely trustworthy for production systems.
If that notebook of yours is a playground/testing system, a good ZFS test to possibly rule out software versus hardware problems would be trying ZFS+FreeBSD, which has a more tested and stable codebase.
If you also had in the past a known stable config with Linux+zfs, as per your aditional comments, it could be a good idea to go back and test it, for ruling out possible problems.
As for trying to debug the actual kernel level code, you could try sysdig but if the system hangs, it is possible it dies on you before spewing logs that can lead to the root of the problem (or not).
answered Aug 25 '17 at 16:07
Rui F RibeiroRui F Ribeiro
41.4k1481140
Thank you. This is meant to be a way to test for hardware vs. software? Is there really no other way to capture what's going on behind the scenes?
– Nikos Alexandris
Aug 25 '17 at 16:11
This unix.stackexchange.com/q/157413/13011 I wrote when there was no problem. Perhaps I should try to get that kernel (3.x.x) and ZFS (0.6.3) running again?
– Nikos Alexandris
Aug 25 '17 at 16:12
Sorry, did read well your comment. added to the answer.
– Rui F Ribeiro
Aug 25 '17 at 16:26
1
I will try yet with another live version, which supports for ZFS.
– Nikos Alexandris
Sep 1 '17 at 13:32
1
Tried with an Lubuntu Live USB. There is no problem "there". Firefox is working properly,updatedbas well. Importing my "zpool" worked flawlessly. The blame is on me and the custom kernel configuration I use. Of course, I don't know what exactly is my wrongdoing.
– Nikos Alexandris
Nov 3 '17 at 10:40
|
show 3 more comments
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Whilst it could be a hardware problem, however due to the code maturity of the ZFS code for Linux, and a whole slew of people complaining of your very same message in multiple versions, I am inclined to say that is a software bug.
There have been multiple bugs about race conditions in the ZFS code, and truth is that is not still entirely trustworthy for production systems.
If that notebook of yours is a playground/testing system, a good ZFS test to possibly rule out software versus hardware problems would be trying ZFS+FreeBSD, which has a more tested and stable codebase.
If you also had in the past a known stable config with Linux+zfs, as per your aditional comments, it could be a good idea to go back and test it, for ruling out possible problems.
As for trying to debug the actual kernel level code, you could try sysdig but if the system hangs, it is possible it dies on you before spewing logs that can lead to the root of the problem (or not).
answered Aug 25 '17 at 16:07
Rui F RibeiroRui F Ribeiro
41.4k1481140
Thank you. This is meant to be a way to test for hardware vs. software? Is there really no other way to capture what's going on behind the scenes?
– Nikos Alexandris
Aug 25 '17 at 16:11
This unix.stackexchange.com/q/157413/13011 I wrote when there was no problem. Perhaps I should try to get that kernel (3.x.x) and ZFS (0.6.3) running again?
– Nikos Alexandris
Aug 25 '17 at 16:12
Sorry, did read well your comment. added to the answer.
– Rui F Ribeiro
Aug 25 '17 at 16:26
1
I will try yet with another live version, which supports for ZFS.
– Nikos Alexandris
Sep 1 '17 at 13:32
1
Tried with an Lubuntu Live USB. There is no problem "there". Firefox is working properly,updatedbas well. Importing my "zpool" worked flawlessly. The blame is on me and the custom kernel configuration I use. Of course, I don't know what exactly is my wrongdoing.
– Nikos Alexandris
Nov 3 '17 at 10:40
|
show 3 more comments
Whilst it could be a hardware problem, however due to the code maturity of the ZFS code for Linux, and a whole slew of people complaining of your very same message in multiple versions, I am inclined to say that is a software bug.
There have been multiple bugs about race conditions in the ZFS code, and truth is that is not still entirely trustworthy for production systems.
If that notebook of yours is a playground/testing system, a good ZFS test to possibly rule out software versus hardware problems would be trying ZFS+FreeBSD, which has a more tested and stable codebase.
If you also had in the past a known stable config with Linux+zfs, as per your aditional comments, it could be a good idea to go back and test it, for ruling out possible problems.
As for trying to debug the actual kernel level code, you could try sysdig but if the system hangs, it is possible it dies on you before spewing logs that can lead to the root of the problem (or not).
answered Aug 25 '17 at 16:07
Rui F RibeiroRui F Ribeiro
41.4k1481140
Thank you. This is meant to be a way to test for hardware vs. software? Is there really no other way to capture what's going on behind the scenes?
– Nikos Alexandris
Aug 25 '17 at 16:11
This unix.stackexchange.com/q/157413/13011 I wrote when there was no problem. Perhaps I should try to get that kernel (3.x.x) and ZFS (0.6.3) running again?
– Nikos Alexandris
Aug 25 '17 at 16:12
Sorry, did read well your comment. added to the answer.
– Rui F Ribeiro
Aug 25 '17 at 16:26
1
I will try yet with another live version, which supports for ZFS.
– Nikos Alexandris
Sep 1 '17 at 13:32
1
Tried with an Lubuntu Live USB. There is no problem "there". Firefox is working properly,updatedbas well. Importing my "zpool" worked flawlessly. The blame is on me and the custom kernel configuration I use. Of course, I don't know what exactly is my wrongdoing.
– Nikos Alexandris
Nov 3 '17 at 10:40
|
show 3 more comments
Whilst it could be a hardware problem, however due to the code maturity of the ZFS code for Linux, and a whole slew of people complaining of your very same message in multiple versions, I am inclined to say that is a software bug.
There have been multiple bugs about race conditions in the ZFS code, and truth is that is not still entirely trustworthy for production systems.
If that notebook of yours is a playground/testing system, a good ZFS test to possibly rule out software versus hardware problems would be trying ZFS+FreeBSD, which has a more tested and stable codebase.
If you also had in the past a known stable config with Linux+zfs, as per your aditional comments, it could be a good idea to go back and test it, for ruling out possible problems.
As for trying to debug the actual kernel level code, you could try sysdig but if the system hangs, it is possible it dies on you before spewing logs that can lead to the root of the problem (or not).
answered Aug 25 '17 at 16:07
Rui F RibeiroRui F Ribeiro
41.4k1481140
Whilst it could be a hardware problem, however due to the code maturity of the ZFS code for Linux, and a whole slew of people complaining of your very same message in multiple versions, I am inclined to say that is a software bug.
There have been multiple bugs about race conditions in the ZFS code, and truth is that is not still entirely trustworthy for production systems.
If that notebook of yours is a playground/testing system, a good ZFS test to possibly rule out software versus hardware problems would be trying ZFS+FreeBSD, which has a more tested and stable codebase.
If you also had in the past a known stable config with Linux+zfs, as per your aditional comments, it could be a good idea to go back and test it, for ruling out possible problems.
As for trying to debug the actual kernel level code, you could try sysdig but if the system hangs, it is possible it dies on you before spewing logs that can lead to the root of the problem (or not).
answered Aug 25 '17 at 16:07
Rui F RibeiroRui F Ribeiro
41.4k1481140
edited Sep 1 '17 at 9:37
answered Aug 25 '17 at 16:07
Rui F RibeiroRui F Ribeiro
41.4k1481140
answered Aug 25 '17 at 16:07
Rui F RibeiroRui F Ribeiro
41.4k1481140
answered Aug 25 '17 at 16:07
Rui F RibeiroRui F Ribeiro
41.4k1481140
41.4k1481140
Thank you. This is meant to be a way to test for hardware vs. software? Is there really no other way to capture what's going on behind the scenes?
– Nikos Alexandris
Aug 25 '17 at 16:11
This unix.stackexchange.com/q/157413/13011 I wrote when there was no problem. Perhaps I should try to get that kernel (3.x.x) and ZFS (0.6.3) running again?
– Nikos Alexandris
Aug 25 '17 at 16:12
Sorry, did read well your comment. added to the answer.
– Rui F Ribeiro
Aug 25 '17 at 16:26
1
I will try yet with another live version, which supports for ZFS.
– Nikos Alexandris
Sep 1 '17 at 13:32
1
Tried with an Lubuntu Live USB. There is no problem "there". Firefox is working properly,updatedbas well. Importing my "zpool" worked flawlessly. The blame is on me and the custom kernel configuration I use. Of course, I don't know what exactly is my wrongdoing.
– Nikos Alexandris
Nov 3 '17 at 10:40
|
show 3 more comments
Thank you. This is meant to be a way to test for hardware vs. software? Is there really no other way to capture what's going on behind the scenes?
– Nikos Alexandris
Aug 25 '17 at 16:11
This unix.stackexchange.com/q/157413/13011 I wrote when there was no problem. Perhaps I should try to get that kernel (3.x.x) and ZFS (0.6.3) running again?
– Nikos Alexandris
Aug 25 '17 at 16:12
Sorry, did read well your comment. added to the answer.
– Rui F Ribeiro
Aug 25 '17 at 16:26
1
I will try yet with another live version, which supports for ZFS.
– Nikos Alexandris
Sep 1 '17 at 13:32
1
Tried with an Lubuntu Live USB. There is no problem "there". Firefox is working properly,updatedbas well. Importing my "zpool" worked flawlessly. The blame is on me and the custom kernel configuration I use. Of course, I don't know what exactly is my wrongdoing.
– Nikos Alexandris
Nov 3 '17 at 10:40
Thank you. This is meant to be a way to test for hardware vs. software? Is there really no other way to capture what's going on behind the scenes?
– Nikos Alexandris
Aug 25 '17 at 16:11
Thank you. This is meant to be a way to test for hardware vs. software? Is there really no other way to capture what's going on behind the scenes?
– Nikos Alexandris
Aug 25 '17 at 16:11
This unix.stackexchange.com/q/157413/13011 I wrote when there was no problem. Perhaps I should try to get that kernel (3.x.x) and ZFS (0.6.3) running again?
– Nikos Alexandris
Aug 25 '17 at 16:12
This unix.stackexchange.com/q/157413/13011 I wrote when there was no problem. Perhaps I should try to get that kernel (3.x.x) and ZFS (0.6.3) running again?
– Nikos Alexandris
Aug 25 '17 at 16:12
Sorry, did read well your comment. added to the answer.
– Rui F Ribeiro
Aug 25 '17 at 16:26
Sorry, did read well your comment. added to the answer.
– Rui F Ribeiro
Aug 25 '17 at 16:26
1
1
I will try yet with another live version, which supports for ZFS.
– Nikos Alexandris
Sep 1 '17 at 13:32
I will try yet with another live version, which supports for ZFS.
– Nikos Alexandris
Sep 1 '17 at 13:32
1
1
Tried with an Lubuntu Live USB. There is no problem "there". Firefox is working properly,
updatedb as well. Importing my "zpool" worked flawlessly. The blame is on me and the custom kernel configuration I use. Of course, I don't know what exactly is my wrongdoing.– Nikos Alexandris
Nov 3 '17 at 10:40
Tried with an Lubuntu Live USB. There is no problem "there". Firefox is working properly,
updatedb as well. Importing my "zpool" worked flawlessly. The blame is on me and the custom kernel configuration I use. Of course, I don't know what exactly is my wrongdoing.– Nikos Alexandris
Nov 3 '17 at 10:40
|
show 3 more comments
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NMI by definition is a hw interrupt; it manifesting itself only on those two programs, could it be load related, have you tried other heavy I/O programs?
– Rui F Ribeiro
Aug 25 '17 at 8:59
1
@RuiFRibeiro The OP is not asking what NMI is but what caused the watchdog to be woken up (IOW what caused the kernel to be stuck)
– xhienne
Aug 25 '17 at 9:37
1
@RuiFRibeiro I really want to know whether my laptop needs a hardware service or if I am messing too much with my custom kernel configurations. But, yes, I got the "BUG" also once using a simple
findcommand that was finding too many files.– Nikos Alexandris
Aug 25 '17 at 12:17
@RuiFRibeiro And if useful, I have tried (in the past) an Ubuntu-Live version. It did not cause the CPU to stale.
– Nikos Alexandris
Aug 25 '17 at 12:20
1
@RuiFRibeiro To learn and have fun with it in the beginning. Now because it's neat! See also funtoo.org/ZFS_Fun.
– Nikos Alexandris
Aug 25 '17 at 13:22