On 9/4/06, pandari kashyap <pandari.kashyap@xxxxxxxxx> wrote:
Hello Newbies, I wanted to know whether Kernel maintains a kernel mode stack for each user process? or does it maintain one kernel mode stack for all user processes?. Where exactly in memory is this stack space allocated?.
The stack space is allocated in the kernel virtual memory address space (3GB - 4GB). There is one kernel mode stack per user process. There is also one kernel mode stack per kernel process (i.e. the processes that are not attached to any user process - created using kernel_thread()). I'm not sure about the interrupt mode stack though, but I guess there is ONE interrupt mode stack per CPU (And all drivers share it?).
How does kernel get the address of the process descriptor from the stack pointer?
Look for the "current" macro in current.h. Thanks, Rajat -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
