Re: additional oom-killer tuneable worth submitting?

Alan
2006-12-07T23:14:34Z

> We add a new "oom_thresh" member to the task struct.
> We introduce a new proc entry "/proc/<pid>/oomthresh" to control it.
>
> The "oom-thresh" value maps to the max expected memory consumption for
> that process. As long as a process uses less memory than the specified
> threshold, then it is immune to the oom-killer.

You've just introduced a deadlock. What happens if nobody is over that
predicted memory and the kernel uses more resource ?
>
> On an embedded platform this allows the designer to engineer the system
> and protect critical apps based on their expected memory consumption.
> If one of those apps goes crazy and starts chewing additional memory
> then it becomes vulnerable to the oom killer while the other apps remain
> protected.

That is why we have no-overcommit support. Now there is an argument for
a meaningful rlimit-as to go with it, and together I think they do what
you really need.

Alan