How can insmod fail with kernel module is already loaded, even is lsmod does not contain that module?Are...
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How can insmod fail with kernel module is already loaded, even is lsmod does not contain that module?
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}
I'm making a minimal Linux distro with buildroot to learn kernel module development.
If I call a minimal module hello.ko (or almost any other name I've tried), everything works fine.
However, if I use the exact same code, but call the module workqueue.ko, insmod workqueue.ko fails, dmesg contains:
workqueue: module is already loaded
and insmod outputs to stderr:
insmod: can't insert 'workqueue.ko': invalid argument
Both lsmod and cat /proc/modules are empty.
This is the exact repo that produced the problem.
For reference the module code is:
#include <linux/module.h>
#include <linux/kernel.h>
MODULE_LICENSE("GPL");
int init_module(void)
{
printk(KERN_INFO "hello initn");
return 0;
}
void cleanup_module(void)
{
printk(KERN_INFO "hello cleanupn");
}
and the kernel version (default implied by buildroot) is 4.9.
linux linux-kernel kernel-modules buildroot
edited May 14 '17 at 14:03
GAD3R
28.6k1959116
asked May 14 '17 at 10:35
Ciro Santilli 新疆改造中心996ICU六四事件Ciro Santilli 新疆改造中心996ICU六四事件
5,63024847
add a comment |
I'm making a minimal Linux distro with buildroot to learn kernel module development.
If I call a minimal module hello.ko (or almost any other name I've tried), everything works fine.
However, if I use the exact same code, but call the module workqueue.ko, insmod workqueue.ko fails, dmesg contains:
workqueue: module is already loaded
and insmod outputs to stderr:
insmod: can't insert 'workqueue.ko': invalid argument
Both lsmod and cat /proc/modules are empty.
This is the exact repo that produced the problem.
For reference the module code is:
#include <linux/module.h>
#include <linux/kernel.h>
MODULE_LICENSE("GPL");
int init_module(void)
{
printk(KERN_INFO "hello initn");
return 0;
}
void cleanup_module(void)
{
printk(KERN_INFO "hello cleanupn");
}
and the kernel version (default implied by buildroot) is 4.9.
linux linux-kernel kernel-modules buildroot
edited May 14 '17 at 14:03
GAD3R
28.6k1959116
asked May 14 '17 at 10:35
Ciro Santilli 新疆改造中心996ICU六四事件Ciro Santilli 新疆改造中心996ICU六四事件
5,63024847
add a comment |
I'm making a minimal Linux distro with buildroot to learn kernel module development.
If I call a minimal module hello.ko (or almost any other name I've tried), everything works fine.
However, if I use the exact same code, but call the module workqueue.ko, insmod workqueue.ko fails, dmesg contains:
workqueue: module is already loaded
and insmod outputs to stderr:
insmod: can't insert 'workqueue.ko': invalid argument
Both lsmod and cat /proc/modules are empty.
This is the exact repo that produced the problem.
For reference the module code is:
#include <linux/module.h>
#include <linux/kernel.h>
MODULE_LICENSE("GPL");
int init_module(void)
{
printk(KERN_INFO "hello initn");
return 0;
}
void cleanup_module(void)
{
printk(KERN_INFO "hello cleanupn");
}
and the kernel version (default implied by buildroot) is 4.9.
linux linux-kernel kernel-modules buildroot
edited May 14 '17 at 14:03
GAD3R
28.6k1959116
asked May 14 '17 at 10:35
Ciro Santilli 新疆改造中心996ICU六四事件Ciro Santilli 新疆改造中心996ICU六四事件
5,63024847
I'm making a minimal Linux distro with buildroot to learn kernel module development.
If I call a minimal module hello.ko (or almost any other name I've tried), everything works fine.
However, if I use the exact same code, but call the module workqueue.ko, insmod workqueue.ko fails, dmesg contains:
workqueue: module is already loaded
and insmod outputs to stderr:
insmod: can't insert 'workqueue.ko': invalid argument
Both lsmod and cat /proc/modules are empty.
This is the exact repo that produced the problem.
For reference the module code is:
#include <linux/module.h>
#include <linux/kernel.h>
MODULE_LICENSE("GPL");
int init_module(void)
{
printk(KERN_INFO "hello initn");
return 0;
}
void cleanup_module(void)
{
printk(KERN_INFO "hello cleanupn");
}
and the kernel version (default implied by buildroot) is 4.9.
linux linux-kernel kernel-modules buildroot
linux linux-kernel kernel-modules buildroot
edited May 14 '17 at 14:03
GAD3R
28.6k1959116
asked May 14 '17 at 10:35
Ciro Santilli 新疆改造中心996ICU六四事件Ciro Santilli 新疆改造中心996ICU六四事件
5,63024847
edited May 14 '17 at 14:03
GAD3R
28.6k1959116
asked May 14 '17 at 10:35
Ciro Santilli 新疆改造中心996ICU六四事件Ciro Santilli 新疆改造中心996ICU六四事件
5,63024847
edited May 14 '17 at 14:03
GAD3R
28.6k1959116
edited May 14 '17 at 14:03
GAD3R
28.6k1959116
edited May 14 '17 at 14:03
GAD3R
28.6k1959116
28.6k1959116
asked May 14 '17 at 10:35
Ciro Santilli 新疆改造中心996ICU六四事件Ciro Santilli 新疆改造中心996ICU六四事件
5,63024847
asked May 14 '17 at 10:35
Ciro Santilli 新疆改造中心996ICU六四事件Ciro Santilli 新疆改造中心996ICU六四事件
5,63024847
asked May 14 '17 at 10:35
Ciro Santilli 新疆改造中心996ICU六四事件Ciro Santilli 新疆改造中心996ICU六四事件
5,63024847
5,63024847
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
$ uname -a
Linux alan-laptop 4.10.14-200.fc25.x86_64 #1 SMP Wed May 3 22:52:30 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
$ ls /sys/module/workqueue/
parameters uevent
$ ls /sys/module/workqueue/parameters/
debug_force_rr_cpu disable_numa power_efficient
It's a builtin already. Maybe to provide a namespace for the parameters that effect kernel workqueue behaviour.
answered May 14 '17 at 11:40
sourcejedisourcejedi
26.7k445119
Hmmm, can you find where in the source that gets created? I could not find any settings in.config. Why not just use other/sysfiles that don't conflict with module names?
– Ciro Santilli 新疆改造中心996ICU六四事件
May 14 '17 at 11:45
1
@CiroSantilli709大抓捕六四事件法轮功 You know how to define a module, you can just usegit grepto search for a definition of the moduleworkqueue.
– sourcejedi
May 14 '17 at 12:10
@CiroSantilli包子露宪六四事件法轮功 that's not what the link says. It is/sys/module/that shows builtins like this "workqueue". They don't show up in/proc/modules.
– sourcejedi
May 15 '18 at 17:46
Yes, you are right, I copied wrong.
– Ciro Santilli 新疆改造中心996ICU六四事件
May 15 '18 at 19:21
fun fact: some things under/sys/moduleare not necessarily moduels it seems unix.stackexchange.com/questions/225706/…
– Ciro Santilli 新疆改造中心996ICU六四事件
May 15 '18 at 19:22
add a comment |
Do not use workqueue as kernel module's name.
In this case, some conflicts could happen.
answered 20 mins ago
劉宥辰劉宥辰
1
New contributor
劉宥辰 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
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2 Answers
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2 Answers
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votes
$ uname -a
Linux alan-laptop 4.10.14-200.fc25.x86_64 #1 SMP Wed May 3 22:52:30 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
$ ls /sys/module/workqueue/
parameters uevent
$ ls /sys/module/workqueue/parameters/
debug_force_rr_cpu disable_numa power_efficient
It's a builtin already. Maybe to provide a namespace for the parameters that effect kernel workqueue behaviour.
answered May 14 '17 at 11:40
sourcejedisourcejedi
26.7k445119
Hmmm, can you find where in the source that gets created? I could not find any settings in.config. Why not just use other/sysfiles that don't conflict with module names?
– Ciro Santilli 新疆改造中心996ICU六四事件
May 14 '17 at 11:45
1
@CiroSantilli709大抓捕六四事件法轮功 You know how to define a module, you can just usegit grepto search for a definition of the moduleworkqueue.
– sourcejedi
May 14 '17 at 12:10
@CiroSantilli包子露宪六四事件法轮功 that's not what the link says. It is/sys/module/that shows builtins like this "workqueue". They don't show up in/proc/modules.
– sourcejedi
May 15 '18 at 17:46
Yes, you are right, I copied wrong.
– Ciro Santilli 新疆改造中心996ICU六四事件
May 15 '18 at 19:21
fun fact: some things under/sys/moduleare not necessarily moduels it seems unix.stackexchange.com/questions/225706/…
– Ciro Santilli 新疆改造中心996ICU六四事件
May 15 '18 at 19:22
add a comment |
$ uname -a
Linux alan-laptop 4.10.14-200.fc25.x86_64 #1 SMP Wed May 3 22:52:30 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
$ ls /sys/module/workqueue/
parameters uevent
$ ls /sys/module/workqueue/parameters/
debug_force_rr_cpu disable_numa power_efficient
It's a builtin already. Maybe to provide a namespace for the parameters that effect kernel workqueue behaviour.
answered May 14 '17 at 11:40
sourcejedisourcejedi
26.7k445119
Hmmm, can you find where in the source that gets created? I could not find any settings in.config. Why not just use other/sysfiles that don't conflict with module names?
– Ciro Santilli 新疆改造中心996ICU六四事件
May 14 '17 at 11:45
1
@CiroSantilli709大抓捕六四事件法轮功 You know how to define a module, you can just usegit grepto search for a definition of the moduleworkqueue.
– sourcejedi
May 14 '17 at 12:10
@CiroSantilli包子露宪六四事件法轮功 that's not what the link says. It is/sys/module/that shows builtins like this "workqueue". They don't show up in/proc/modules.
– sourcejedi
May 15 '18 at 17:46
Yes, you are right, I copied wrong.
– Ciro Santilli 新疆改造中心996ICU六四事件
May 15 '18 at 19:21
fun fact: some things under/sys/moduleare not necessarily moduels it seems unix.stackexchange.com/questions/225706/…
– Ciro Santilli 新疆改造中心996ICU六四事件
May 15 '18 at 19:22
add a comment |
$ uname -a
Linux alan-laptop 4.10.14-200.fc25.x86_64 #1 SMP Wed May 3 22:52:30 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
$ ls /sys/module/workqueue/
parameters uevent
$ ls /sys/module/workqueue/parameters/
debug_force_rr_cpu disable_numa power_efficient
It's a builtin already. Maybe to provide a namespace for the parameters that effect kernel workqueue behaviour.
answered May 14 '17 at 11:40
sourcejedisourcejedi
26.7k445119
$ uname -a
Linux alan-laptop 4.10.14-200.fc25.x86_64 #1 SMP Wed May 3 22:52:30 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
$ ls /sys/module/workqueue/
parameters uevent
$ ls /sys/module/workqueue/parameters/
debug_force_rr_cpu disable_numa power_efficient
It's a builtin already. Maybe to provide a namespace for the parameters that effect kernel workqueue behaviour.
answered May 14 '17 at 11:40
sourcejedisourcejedi
26.7k445119
answered May 14 '17 at 11:40
sourcejedisourcejedi
26.7k445119
answered May 14 '17 at 11:40
sourcejedisourcejedi
26.7k445119
answered May 14 '17 at 11:40
sourcejedisourcejedi
26.7k445119
26.7k445119
Hmmm, can you find where in the source that gets created? I could not find any settings in.config. Why not just use other/sysfiles that don't conflict with module names?
– Ciro Santilli 新疆改造中心996ICU六四事件
May 14 '17 at 11:45
1
@CiroSantilli709大抓捕六四事件法轮功 You know how to define a module, you can just usegit grepto search for a definition of the moduleworkqueue.
– sourcejedi
May 14 '17 at 12:10
@CiroSantilli包子露宪六四事件法轮功 that's not what the link says. It is/sys/module/that shows builtins like this "workqueue". They don't show up in/proc/modules.
– sourcejedi
May 15 '18 at 17:46
Yes, you are right, I copied wrong.
– Ciro Santilli 新疆改造中心996ICU六四事件
May 15 '18 at 19:21
fun fact: some things under/sys/moduleare not necessarily moduels it seems unix.stackexchange.com/questions/225706/…
– Ciro Santilli 新疆改造中心996ICU六四事件
May 15 '18 at 19:22
add a comment |
Hmmm, can you find where in the source that gets created? I could not find any settings in.config. Why not just use other/sysfiles that don't conflict with module names?
– Ciro Santilli 新疆改造中心996ICU六四事件
May 14 '17 at 11:45
1
@CiroSantilli709大抓捕六四事件法轮功 You know how to define a module, you can just usegit grepto search for a definition of the moduleworkqueue.
– sourcejedi
May 14 '17 at 12:10
@CiroSantilli包子露宪六四事件法轮功 that's not what the link says. It is/sys/module/that shows builtins like this "workqueue". They don't show up in/proc/modules.
– sourcejedi
May 15 '18 at 17:46
Yes, you are right, I copied wrong.
– Ciro Santilli 新疆改造中心996ICU六四事件
May 15 '18 at 19:21
fun fact: some things under/sys/moduleare not necessarily moduels it seems unix.stackexchange.com/questions/225706/…
– Ciro Santilli 新疆改造中心996ICU六四事件
May 15 '18 at 19:22
Hmmm, can you find where in the source that gets created? I could not find any settings in
.config. Why not just use other /sys files that don't conflict with module names?– Ciro Santilli 新疆改造中心996ICU六四事件
May 14 '17 at 11:45
Hmmm, can you find where in the source that gets created? I could not find any settings in
.config. Why not just use other /sys files that don't conflict with module names?– Ciro Santilli 新疆改造中心996ICU六四事件
May 14 '17 at 11:45
1
1
@CiroSantilli709大抓捕六四事件法轮功 You know how to define a module, you can just use
git grep to search for a definition of the module workqueue.– sourcejedi
May 14 '17 at 12:10
@CiroSantilli709大抓捕六四事件法轮功 You know how to define a module, you can just use
git grep to search for a definition of the module workqueue.– sourcejedi
May 14 '17 at 12:10
@CiroSantilli包子露宪六四事件法轮功 that's not what the link says. It is
/sys/module/ that shows builtins like this "workqueue". They don't show up in /proc/modules.– sourcejedi
May 15 '18 at 17:46
@CiroSantilli包子露宪六四事件法轮功 that's not what the link says. It is
/sys/module/ that shows builtins like this "workqueue". They don't show up in /proc/modules.– sourcejedi
May 15 '18 at 17:46
Yes, you are right, I copied wrong.
– Ciro Santilli 新疆改造中心996ICU六四事件
May 15 '18 at 19:21
Yes, you are right, I copied wrong.
– Ciro Santilli 新疆改造中心996ICU六四事件
May 15 '18 at 19:21
fun fact: some things under
/sys/module are not necessarily moduels it seems unix.stackexchange.com/questions/225706/…– Ciro Santilli 新疆改造中心996ICU六四事件
May 15 '18 at 19:22
fun fact: some things under
/sys/module are not necessarily moduels it seems unix.stackexchange.com/questions/225706/…– Ciro Santilli 新疆改造中心996ICU六四事件
May 15 '18 at 19:22
add a comment |
Do not use workqueue as kernel module's name.
In this case, some conflicts could happen.
answered 20 mins ago
劉宥辰劉宥辰
1
New contributor
劉宥辰 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
Do not use workqueue as kernel module's name.
In this case, some conflicts could happen.
answered 20 mins ago
劉宥辰劉宥辰
1
New contributor
劉宥辰 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
Do not use workqueue as kernel module's name.
In this case, some conflicts could happen.
answered 20 mins ago
劉宥辰劉宥辰
1
New contributor
劉宥辰 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Do not use workqueue as kernel module's name.
In this case, some conflicts could happen.
answered 20 mins ago
劉宥辰劉宥辰
1
New contributor
劉宥辰 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 20 mins ago
劉宥辰劉宥辰
1
New contributor
劉宥辰 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 20 mins ago
劉宥辰劉宥辰
1
answered 20 mins ago
劉宥辰劉宥辰
1
1
New contributor
劉宥辰 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
劉宥辰 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
劉宥辰 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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