Re: Memory overcommit

From: KOSAKI Motohiro
Date: Tue Oct 27 2009 - 02:46:48 EST


> > > %check_badness.pl | sort -n | tail
> > > --
> > > 89924 Â 3938 Â Âmixer_applet2
> > > 90210 Â 3942 Â Âtomboy
> > > 94753 Â 3936 Â Âclock-applet
> > > 101994 Â3919 Â Âpulseaudio
> > > 113525 Â4028 Â Âgnome-terminal
> > > 127340 Â1 Â Â Â init
> > > 128177 Â3871 Â Ânautilus
> > > 151003 Â11515 Â bash
> > > 256944 Â11653 Â mmap
> > > 425561 Â3829 Â Âgnome-session
> > > --
> > > Sigh, gnome-session has twice value of mmap(1G).
> > > Of course, gnome-session only uses 6M bytes of anon.
> > > I wonder this is because gnome-session has many children..but need to
> > > dig more. Does anyone has idea ?
> > > (CCed kosaki)
> >
> > Following output address the issue.
> > The fact is, modern desktop application linked pretty many library. it
> > makes bloat VSS size and increase
> > OOM score.
> >
> > Ideally, We shouldn't account evictable file-backed mappings for oom_score.
> >
> Hmm.
> I wonder why we consider VM size for OOM kiling.
> How about RSS size?

Because, swap out-ed bad body (e.g. fork bomb process) still should
be killed by oom.
RSS + swap-entries is acceptable to me.



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