Re: weird memory related problems, negative memory usage or fake memory usage?

[Andrea Arcangeli]

On Tue, Sep 25, 2001 at 07:54:07PM -0300, Rik van Riel wrote:
> On Wed, 26 Sep 2001, Andrea Arcangeli wrote:
> > On Mon, Sep 24, 2001 at 07:03:20PM -0300, Rik van Riel wrote:
> > > On Mon, 24 Sep 2001, Olivier Sessink wrote:
> 
> > > >   PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME COMMAND
> > > >  1262 root       5 -10 50764  -1M  1320 S <   2.7 99.9   0:01 XFree86
> > >
> > > It seems Andrea wasn't careful with the merge and
> > > backed out some of the locking wrt mm->rss.
> >
> > thanks for forwarding this report, actually I just noticed this
> > here and that's good so I can reproduce :)
> >
> > it is possible it is my mistake, but I don't think so, infact I
> > don't recall to have changed rss stuff or locking around it.
> 
> Mmm, then it could also be one of the bugs which got
> fixed in -ac but where Linus never reacted to the

possibly yes but maybe not, dunno right now or I would be just sending
the fix inline in this email :).  As said I never seen it before Ben's
tlb shootdown was merged into mainline, but again I repeat it can
_really_ be just an unlucky coincidence. But I guess because of this
coincidence the tlb shootdown will be the first things I will audit
tomorrow.

Andrea