Re: Scheduler: SIGSTOP on multi threaded processes

[Alex Riesen]

On 5/4/05, Daniel Jacobowitz <dan@xxxxxxxxxx> wrote:
> On Wed, May 04, 2005 at 02:16:24PM -0400, Richard B. Johnson wrote:
> > The kernel doesn't do SIGSTOP or SIGCONT. Within init, there is
> > a SIGSTOP and SIGCONT handler. These can be inherited by others
> > unless changed, perhaps by a 'C' runtime library. Basically,
> > the SIGSTOP handler executes pause() until the SIGCONT signal
> > is received.
> >
> > Any delay in stopping is the time necessary for the signal to
> > be delivered. It is possible that the section of code that
> > contains the STOP/CONT handler was paged out and needs to be
> > paged in before the signal can be delivered.
> >
> > You might quicken this up by installing your own handler for
> > SIGSTOP and SIGCONT....
> 
> I don't know what RTOSes you've been working with recently, but none of
> the above is true for Linux.  I don't think it ever has been.
> 

I don't even think it was true for anything. It's his usual way of
saying things.
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