Messages in this thread | | | Date | Fri, 09 Apr 1999 12:17:58 -0400 | From | Brian Gerst <> | Subject | Re: Kernel Stack |
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Livia Catarina Soares wrote: > 1- Where is the kernel stack ?? > Is it above the address "0xC0000000" in the kernel memory ??
There is one kernel stack for every user process, and it is mapped in kernel memory (above PAGE_OFFSET). Note that even in an interrupt context, the kernel stack of whatever user process was running is used.
> 2- Which is the size of the kernel stack ??
It is fixed at 8k - sizeof (struct task_struct). This is the reason recursion in the kernel should be avoided.
> 3- Is there some system call that inform the kernel stack free size ??
No. Normally when in user mode the kernel stack should be empty.
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Brian Gerst
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