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Monolithic vs Micro kernel
How to switch from a custom Linux kernel to a distribution kernelWhy do we need a compiled kernel source tree for compiling modules?What can cause kernel out_of_memory error?Kernel Printk: xx message suppressedsolaris to linux migrationWhat are main differences between Linux and FreeBSD system from sysadmin point of view?Server won't boot, kernel panic - not syncingHow to disable perf subsystem in Linux kernel?How can I track security issues with running kernel under paravirtualisation?Exec format Error. cxbf.ko from kernel has no modversions, so it cannot be reused for kernel
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What are the differences between a monolithic kernel and a microkernel with respect to structure and security. My friend told me that Linux systems have monolithic kernel and thus are not easier to hack but I don't think he was actually correct.
Someone please enlighten me.
unix kernel
asked Aug 14 '10 at 13:39
Prasoon SauravPrasoon Saurav
19727
add a comment |
What are the differences between a monolithic kernel and a microkernel with respect to structure and security. My friend told me that Linux systems have monolithic kernel and thus are not easier to hack but I don't think he was actually correct.
Someone please enlighten me.
unix kernel
asked Aug 14 '10 at 13:39
Prasoon SauravPrasoon Saurav
19727
For a bit of historical background, you can read the The Tanenbaum-Torvalds Debate from 1992.
– Dennis Williamson
Aug 14 '10 at 18:24
add a comment |
What are the differences between a monolithic kernel and a microkernel with respect to structure and security. My friend told me that Linux systems have monolithic kernel and thus are not easier to hack but I don't think he was actually correct.
Someone please enlighten me.
unix kernel
asked Aug 14 '10 at 13:39
Prasoon SauravPrasoon Saurav
19727
What are the differences between a monolithic kernel and a microkernel with respect to structure and security. My friend told me that Linux systems have monolithic kernel and thus are not easier to hack but I don't think he was actually correct.
Someone please enlighten me.
unix kernel
unix kernel
asked Aug 14 '10 at 13:39
Prasoon SauravPrasoon Saurav
19727
asked Aug 14 '10 at 13:39
Prasoon SauravPrasoon Saurav
19727
asked Aug 14 '10 at 13:39
Prasoon SauravPrasoon Saurav
19727
asked Aug 14 '10 at 13:39
Prasoon SauravPrasoon Saurav
19727
asked Aug 14 '10 at 13:39
Prasoon SauravPrasoon Saurav
19727
19727
For a bit of historical background, you can read the The Tanenbaum-Torvalds Debate from 1992.
– Dennis Williamson
Aug 14 '10 at 18:24
add a comment |
For a bit of historical background, you can read the The Tanenbaum-Torvalds Debate from 1992.
– Dennis Williamson
Aug 14 '10 at 18:24
For a bit of historical background, you can read the The Tanenbaum-Torvalds Debate from 1992.
– Dennis Williamson
Aug 14 '10 at 18:24
For a bit of historical background, you can read the The Tanenbaum-Torvalds Debate from 1992.
– Dennis Williamson
Aug 14 '10 at 18:24
add a comment |
2 Answers
2
active
oldest
votes
The basic difference is that a micro kernel (MK) is very small and only provides a very minimal set of services.
The majority of what are normally considered operating system services are provided by separate processes that execute outside of the kernel, and in a less privileged mode.
These processes need to comunicate via some from of IPC, instead of just reading/writing to whatever data structure they want to access.
MKs tend to be fairly easy to port as the kernel is small, the porting effort is low.
Since a lot of the services provided are potentially running in userspace instead of kernel space, they can not easily trash other processes. This is a security plus.
E.g say the part of the networking stack was in userspace, and was compromised it might not be able to disrupt other processes/tasks. Whereas if that same part of the network stack in a monolithic kernel might be running in kernel space where if compromised it would be able to trash other processes, since it would be privileged.
answered Aug 14 '10 at 14:11
Jason TanJason Tan
2,48221321
add a comment |
To illustrate Jason's talk, here is an illustration to see the difference between micro- hybrid- and monolithic-kernel :
Legible image source file on Wikipedia.
edited Apr 28 at 21:15
Community♦
1
answered Aug 14 '10 at 18:19
StuderStuder
1,180714
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
The basic difference is that a micro kernel (MK) is very small and only provides a very minimal set of services.
The majority of what are normally considered operating system services are provided by separate processes that execute outside of the kernel, and in a less privileged mode.
These processes need to comunicate via some from of IPC, instead of just reading/writing to whatever data structure they want to access.
MKs tend to be fairly easy to port as the kernel is small, the porting effort is low.
Since a lot of the services provided are potentially running in userspace instead of kernel space, they can not easily trash other processes. This is a security plus.
E.g say the part of the networking stack was in userspace, and was compromised it might not be able to disrupt other processes/tasks. Whereas if that same part of the network stack in a monolithic kernel might be running in kernel space where if compromised it would be able to trash other processes, since it would be privileged.
answered Aug 14 '10 at 14:11
Jason TanJason Tan
2,48221321
add a comment |
The basic difference is that a micro kernel (MK) is very small and only provides a very minimal set of services.
The majority of what are normally considered operating system services are provided by separate processes that execute outside of the kernel, and in a less privileged mode.
These processes need to comunicate via some from of IPC, instead of just reading/writing to whatever data structure they want to access.
MKs tend to be fairly easy to port as the kernel is small, the porting effort is low.
Since a lot of the services provided are potentially running in userspace instead of kernel space, they can not easily trash other processes. This is a security plus.
E.g say the part of the networking stack was in userspace, and was compromised it might not be able to disrupt other processes/tasks. Whereas if that same part of the network stack in a monolithic kernel might be running in kernel space where if compromised it would be able to trash other processes, since it would be privileged.
answered Aug 14 '10 at 14:11
Jason TanJason Tan
2,48221321
add a comment |
The basic difference is that a micro kernel (MK) is very small and only provides a very minimal set of services.
The majority of what are normally considered operating system services are provided by separate processes that execute outside of the kernel, and in a less privileged mode.
These processes need to comunicate via some from of IPC, instead of just reading/writing to whatever data structure they want to access.
MKs tend to be fairly easy to port as the kernel is small, the porting effort is low.
Since a lot of the services provided are potentially running in userspace instead of kernel space, they can not easily trash other processes. This is a security plus.
E.g say the part of the networking stack was in userspace, and was compromised it might not be able to disrupt other processes/tasks. Whereas if that same part of the network stack in a monolithic kernel might be running in kernel space where if compromised it would be able to trash other processes, since it would be privileged.
answered Aug 14 '10 at 14:11
Jason TanJason Tan
2,48221321
The basic difference is that a micro kernel (MK) is very small and only provides a very minimal set of services.
The majority of what are normally considered operating system services are provided by separate processes that execute outside of the kernel, and in a less privileged mode.
These processes need to comunicate via some from of IPC, instead of just reading/writing to whatever data structure they want to access.
MKs tend to be fairly easy to port as the kernel is small, the porting effort is low.
Since a lot of the services provided are potentially running in userspace instead of kernel space, they can not easily trash other processes. This is a security plus.
E.g say the part of the networking stack was in userspace, and was compromised it might not be able to disrupt other processes/tasks. Whereas if that same part of the network stack in a monolithic kernel might be running in kernel space where if compromised it would be able to trash other processes, since it would be privileged.
answered Aug 14 '10 at 14:11
Jason TanJason Tan
2,48221321
edited Aug 14 '10 at 16:12
answered Aug 14 '10 at 14:11
Jason TanJason Tan
2,48221321
answered Aug 14 '10 at 14:11
Jason TanJason Tan
2,48221321
answered Aug 14 '10 at 14:11
Jason TanJason Tan
2,48221321
2,48221321
add a comment |
add a comment |
To illustrate Jason's talk, here is an illustration to see the difference between micro- hybrid- and monolithic-kernel :
Legible image source file on Wikipedia.
edited Apr 28 at 21:15
Community♦
1
answered Aug 14 '10 at 18:19
StuderStuder
1,180714
add a comment |
To illustrate Jason's talk, here is an illustration to see the difference between micro- hybrid- and monolithic-kernel :
Legible image source file on Wikipedia.
edited Apr 28 at 21:15
Community♦
1
answered Aug 14 '10 at 18:19
StuderStuder
1,180714
add a comment |
To illustrate Jason's talk, here is an illustration to see the difference between micro- hybrid- and monolithic-kernel :
Legible image source file on Wikipedia.
edited Apr 28 at 21:15
Community♦
1
answered Aug 14 '10 at 18:19
StuderStuder
1,180714
To illustrate Jason's talk, here is an illustration to see the difference between micro- hybrid- and monolithic-kernel :
Legible image source file on Wikipedia.
edited Apr 28 at 21:15
Community♦
1
answered Aug 14 '10 at 18:19
StuderStuder
1,180714
edited Apr 28 at 21:15
Community♦
1
edited Apr 28 at 21:15
Community♦
1
edited Apr 28 at 21:15
Community♦
1
1
answered Aug 14 '10 at 18:19
StuderStuder
1,180714
answered Aug 14 '10 at 18:19
StuderStuder
1,180714
answered Aug 14 '10 at 18:19
StuderStuder
1,180714
1,180714
add a comment |
add a comment |
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For a bit of historical background, you can read the The Tanenbaum-Torvalds Debate from 1992.
– Dennis Williamson
Aug 14 '10 at 18:24