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Re: whether kernel thread has its own address space.

On Tue, 2006-05-02 at 16:15 +0530, Manjunath Naik wrote:
>  
> Hi all,
>  
> While I am reading "Understanding Linux Kernel" Book, I came across
> the following sentence in chapter 11 - Process Scheduling.
>  
> "The Schedule() function ensure that if next selected process is
> kernel thread, then it uses the address space used by the previos
> process".
>  
> Why it is required?

it's an optimization

>  Does the kernel thread not have its own address space?

what would it *mean* to have a own address space (userspace address
space that is).. you're not allowed to do copy_*_user api from kernel
thread for this reason.. since it means nothing.



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