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SubjectRe: [PATCH] VM fix for 2.4.0-test9 & OOM handler
On Mon, 9 Oct 2000, Andrea Arcangeli wrote:
> On Mon, Oct 09, 2000 at 10:06:02PM +0200, Ingo Molnar wrote:
> > i think the OOM algorithm should not kill processes that have
> > process that has child processes likely results in unexpected behavior of
>
> You just know what I think about those heuristics. I think all
> we need is a per-task pagefault/allocation rate avoiding any
> other complication that tries to do the right thing but that it
> will end doing the wrong thing eventually, but obviously nobody
> agreeed with me and before I implement that myself it will still
> take some time.

Furthermore, keeping track of these allocations will mean that you
/ALWAYS/ rack up the overhead of keeping track of this, even though
most machines probably won't run out of memory ever, or no more
than twice a year or so ;)

> Even the total_vm information will be wrong for example if the
> task was a netscape iconized and completly swapped out that
> wasn't running since two days. Killing it is going to only delay
> the killing of the real offender that is generating a flood of
> page faults at high frequency.

However true this may be, I wonder if we really care /that/ much.

OOM is a very rare situation and as long as you don't do something
that's really a bad surprise to the user, everything should be ok.

regards,

Rik
--
"What you're running that piece of shit Gnome?!?!"
-- Miguel de Icaza, UKUUG 2000

http://www.conectiva.com/ http://www.surriel.com/

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