[ale] Swap Memory usage

[stephen at phynp6.phy-astr.gsu.edu (Stephen Leonard)]

Chris Ricker <kaboom at gatech.edu> writes:

> On Sun, 21 Sep 2003, Stephen Leonard wrote:
> 
> > I think the standard method is to use mlock(2) to keep pages
> > resident in memory.  However, I didn't see any occurences of
> > it with a quick grep through openssh-3.7.1p1.
> 
> It is the standard tool, but it's not used much b/c on many systems 
> (including Linux), only root can mlock() for security reasons. Rather than 
> having to make ssh-agent, the ssh client, etc., SUID, it's just not used in 
> them....

I see.  Well, fwiw, setrlimit(2) has RLIMIT_MEMLOCK.  This may
be OS dependent, but i would imagine it would allow processes
to mlock() pages without a DoS to the system.  But I understand
your point.  I guess it mainly depends on the security policy
of the application in mind.

stephen