Re: Can't stop find-grep-dired when using Cygwin for the inferior process

[Lennart Borgman]

Kim F. Storm wrote:
> How can the choice of firewall influence whether delete-process
> works or not?
>   
I do not know. I just know that when I reverted to my old firewall the 
problem seems to be (nearly) gone. And I know that with the other 
firewall things sometimes slowed down to a crawl.

I am guessing that it was a lot of swapping behind this.
>   
> > After that I tested again and I was going to say that the problem is
> > gone. It is nearly - but not quite. Most of the times kill-find works
> > now, but once Emacs froze like before. Could this be some kind of race
> > condition?
> >     
>
> Without knowing what emacs was doing or waiting for, nobody can tell!
>   
You are right of course. I just guessed on a race conditions since the 
freeze does not happen always and it happens much more often when using 
that other firewall.


> If you are just interested in a few defines, just printf them in main.
>
>   
Thanks, that is about what I have been doing.
> > > AFAICS, delete-process calls kill-process, so it looks like a loop
> > > in some of the book-keeping in delete-process ... can you find that
> > > loop?  IOW, what is emacs doing when it "hangs" ?
> > >   
> > >       
> > It does not look like a loop. Emacs eats no CPU.
> >     
>
> It is probably waiting for some event then.  A backtrace
> should show you where it is waiting, and the state may
> then show you what it is waiting for.
>   
Is there any way to get that when Emacs is frozen?

At the moment I just hope that this does not happen again. Actually it 
could have been something outside of Emacs causing the trouble.