Contents of CR3 register when a kernel thread is executed

[Mulyadi Santosa]

On 18/04/2011, limp <johnkyr83 at hotmail.com> wrote:
> Hi all,
>
> I am trying to understand in what extend the PGD (page global directory)
> value stored in the CR3 register indicate the running process/thread by the
> Linux scheduler.
>
> I know that each process has its own PGD value but what I am confused about
> is the value of CR3 register when kernel threads are scheduled.

kernel thread(s) simply borrow latest scheduled process's PGD ( that
means, the entire address space)....this is done to save unneccessary
TLB flush since kernel thread operates in kernel space and that's the
same to all processes

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
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