Subject: Re: CVS commit: syssrc/sys/kern
To: Bill Studenmund <>
From: Jaromir Dolecek <>
List: tech-kern
Date: 12/09/2002 21:42:22
Bill Studenmund wrote:
> How do you tell them apart? If you could apply the 0.5 second delay to
> only cases 2 & 3, then that'd be fine. But you can't.

Indeed. I was trying to argue you don't really need to tell them apart,
but you need :)

> Also, it's one thing to block waiting for a process slot to open up, but
> that's not what you've done. The process waits for an absolute amout of
> time.

It would be quite simple to change it to do wakeup when the process
can do the fork, i.e. when other process exits and frees a usable
process slot. That said, it's not really worth the extra code,
and it would _still_ screw programs like thttpd.
> You've made an unconfigurable change that impacts what has been acceptable
> behavior FOR DECADES. Either revert it, or sysctl it with a default of
> zero.

I think that this makes most sense. It can trivially be switched on
for systems where this would be useful (or when actual fork-bomb lands),
but wouldn't do anything to people who don't explicitly turn it on. 
Would everyone be happy with this? Perry, Thor, Michael, others?

Jaromir Dolecek <>  
-=- We should be mindful of the potential goal, but as the tantric    -=-
-=- Buddhist masters say, ``You may notice during meditation that you -=-
-=- sometimes levitate or glow.   Do not let this distract you.''     -=-