Martin Dalecki wrote:
> 
> I have a constructive proposal:
> 
> It would make much sense to make the oom killer
> leave not just root processes alone but processes belonging to a UID
> lower
> then a certain value as well (500). This would be:
> 
> 1. Easly managable by the admin. Just let oracle/www and analogous users
>    have a UID lower then let's say 500.
> 
> 2. In full compliance with the port trick done by TCP/IP (ports < 1024
> vers other)
> 
> 3. It wouldn't need any addition of new interface (no jebanoje gawno in
> /proc in addition()
> 
> 4. Really simple to implement/document understand.
> 
> 5. Be the same way as Solaris does similiar things.
> 
> ...
> 
> Damn: I will let my chess club alone toady and will just code it down
> NOW.
> 
> Spec:
> 
> 1. Processes with a UID < 100 are immune to OOM killers.
> 2. Processes with a UID >= 100 && < 500 are hard for the OOM killer to
> take on.
> 3. Processes with a UID >= 500 are easy targets.
> 
> Let me introduce a new terminology in full analogy to "fire walls"
> routers and therabouts:
> 
> Processes of category 1. are called captains (oficerzy)
> Processes of category 2. are called corporals (porucznicy)
> Processes of category 2. are called privates (?o3nierze)

OK I just did it. as I already told I have "stress tested it" by 
installing the Orcale insternet application server suide
on a hoplessly underequipped box ("only" 128MByte RMA).
The assorted patch is attached. 

Since I'm one day late up to my promise to provide this
patch it's actually fascinating that already 4 people (in esp. not
newbees requesting a new /proc entry for everything)
for reassurance that I will indeed implement it... Well 
this kind of "high" and "eager" feadback seems for me to indicate 
that there is very serious desire for it. And then of course I
just have to ask our people working with DB's here at work as well :-).

Ah... and of course I think this patch can already go directly 
into the official kernel. The quality of code should permit 
it. I would esp. request Rik van Riel to have a closer look
at it...