Re: Share Wait Queue between different modules ?

[Steven Rostedt <rostedt@goodmis.org>]

On Mon, 2005-05-16 at 16:11 +0100, Dinesh Ahuja wrote:
> Hi ,
> 
> Just trying to explore a situation where different
> modules may need to share same wait queues. Could
> anyone tell me the pratical situation where we need to
> have above mentioned situation ?
> 

Have an example of this situation?

> Please clarify me on below point : 
> We say that kernel stack is very much limited around
> 8KB.
> Does all the running processes share this stack or
> each process has 8KB of the space which process can
> access when it is running in kernel mode.
> 

The later.  Each process has its own kernel stack when in kernel mode.

> Sharing wait queues will be difficult if the kernel
> space is 8KB for all the ready processes because then
> the no of wait_queue_t elements which can be added
> will be limited.
> 

As mentioned above, each process has its own kernel stack.


-- Steve