Re: some doubt in struct task data member..

[Amol Lad <amol@xxxxxxxxxxxxxxxxxxx>]

On Thu, 2006-11-02 at 09:52 +0530, suman adak wrote:
> i have seen this struct task in schd.h file 
> struct task_struct {
>          volatile long state;    /* -1 unrunnable, 0 runnable, >0
> stopped */
>          struct thread_info *thread_info;
>          atomic_t usage; 
>          unsigned long flags;
> ........
> ........
> }
> 
> can anybody pointout me , why state variable is declared as long. I
> wrote one simple module programming to print state value for each
> task.
> I have seen the it is returning 0 or 1 only. Is it not wastage of
> kernel memory declaring as long type as we can do with short int? 
> Or i am missing something else..

Maybe for cache aligning purposes..

> 
> Thanks
> Suman
> 
> 
> 


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