Re: [patch] oom: give current access to memory reserves if it hasbeen killed

From: David Rientjes
Date: Fri Apr 02 2010 - 15:46:53 EST

On Fri, 2 Apr 2010, Oleg Nesterov wrote:

> > > David, you continue to ignore my arguments ;) select_bad_process()
> > > must not filter out the tasks with ->mm == NULL.
> > >
> > I'm not ignoring your arguments, I think you're ignoring what I'm
> > responding to.
> Ah, sorry, I misunderstood your replies.
> > I prefer to keep oom_badness() to be a positive range as
> > it always has been (and /proc/pid/oom_score has always used an unsigned
> > qualifier),
> Yes, I thought about /proc/pid/oom_score, but imho this is minor issue.
> We can s/%lu/%ld/ though, or just report 0 if oom_badness() returns -1.
> Or something.

Just have it return 0, meaning never kill, and then ensure "chosen" is
never set for an oom_badness() of 0, even if we don't have another task to
kill. That's how Documentation/filesystems/proc.txt describes it anyway.
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