Re: List of Processes

["Raghu R. Arur" <rra2002@xxxxxxxxxxxxxxx>]

 Yes, you should hold the lock before iterating over all the tasks. 
Holding the lock is mandatory in SMP kernels.

 Raghu


On Thu, 1 Jul 2004, Anupam Kapoor wrote:

> one small doubt, shouldn't we be acquiring a lock while iterating over
> all the tasks ?
> 
> anupam
> 
> On Thu, 01 Jul 2004 07:20:25 +0000, manish regmi
> <manish_regmi@xxxxxxxxxxx> wrote:
> > 
> > 
> > 
> > >>iirc there is a macro defined already "for_each_process" that you can
> > >use to get all the processes
> > >
> > >struct task_struct  *p;
> > >
> > >for_each_process (p) {
> > >    ....
> > >}
> > >
> > >hth
> > >kind regards
> > >anupam
> > 
> > /* sched.h */
> > 
> > for_each_task(p){
> > ...
> > }
> > 
> > :)
> > 
> > 
> > > > Hi....
> > > >
> > > > I would like to know which file i can find the struct
> > > > that list  all processes executing in linux...
> > > >
> > > > Thanks,
> > > > Luis Henrique.
> > 
> > for_each_task(p)
> > {
> > ...
> > }
> > 
> > You will each task's descriptor on p on each loop. The first one will be
> > that of init. You will automatically break from loop when you finish
> > traverse through all tasks.
> > Actually a circular list.
> > 
> > #define for_each_task(p) \
> >         for (p = &init_task ; (p = p->next_task) != &init_task ; )
> > 
> > regards manish
> > 
> > _________________________________________________________________
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> 
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