Talk:Modular Kernel: Difference between revisions
Latest comment: 15 years ago by Solar in topic Disadvantages
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(New page: == Disadvantages == I don't agree with the following statements under 'Disadvantages': * It may loose stability. If there is a module that does something bad, the kernel can crash, as mod...) |
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* ...and therefore security is compromised. A module can do anything, so one could easily write an evil module to crash things (Some OS's only allow modules to be loaded by the root user). |
* ...and therefore security is compromised. A module can do anything, so one could easily write an evil module to crash things (Some OS's only allow modules to be loaded by the root user). |
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I read that e.g. Minix has it's modules running in user mode, so the first statement is a matter of opinion. Second, a monolithic kernel always has it's 'modules' running in kernel space, so this is not a disadvantage of a modular kernel. It may actually be an advantage that its possible to run the modules in user space, therefore having better protection against 'bad' modules. [[User:Virtlink|Virtlink]] 13:25, 21 October 2008 (UTC) |
I read that e.g. Minix has it's modules running in user mode, so the first statement is a matter of opinion. Second, a monolithic kernel always has it's 'modules' running in kernel space, so this is not a disadvantage of a modular kernel. It may actually be an advantage that its possible to run the modules in user space, therefore having better protection against 'bad' modules. [[User:Virtlink|Virtlink]] 13:25, 21 October 2008 (UTC) |
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:Note that a modular kernel having its modules running in userspace would be called a [[Microkernel]]. -- [[User:Solar|Solar]] 13:41, 21 October 2008 (UTC) |
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Latest revision as of 13:41, 21 October 2008
Disadvantages
I don't agree with the following statements under 'Disadvantages':
- It may loose stability. If there is a module that does something bad, the kernel can crash, as modules should have full permissions.
- ...and therefore security is compromised. A module can do anything, so one could easily write an evil module to crash things (Some OS's only allow modules to be loaded by the root user).
I read that e.g. Minix has it's modules running in user mode, so the first statement is a matter of opinion. Second, a monolithic kernel always has it's 'modules' running in kernel space, so this is not a disadvantage of a modular kernel. It may actually be an advantage that its possible to run the modules in user space, therefore having better protection against 'bad' modules. Virtlink 13:25, 21 October 2008 (UTC)
- Note that a modular kernel having its modules running in userspace would be called a Microkernel. -- Solar 13:41, 21 October 2008 (UTC)