Messages in this thread |  | | Date | Wed, 26 Sep 2001 00:36:26 +0200 | From | Andrea Arcangeli <> | Subject | Re: weird memory related problems, negative memory usage or fake memory usage? |
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On Mon, Sep 24, 2001 at 07:03:20PM -0300, Rik van Riel wrote: > [Andrea, please read this bugreport ...] > > On Mon, 24 Sep 2001, Olivier Sessink wrote: > > > after upgrade from 2.4.10pre8 to 2.4.10 I have weird problems, > > Xfree sometimes shows up with 99.9% memory in top (on a box with > > 512 mb), and in ps axl it has 4294989036 in the RSS column. When > > this happens the box starts to kill some processes, starts > > heavily swapping (top reports > 400MB in the cache, but the > > machine is heavily swapping!!!) and is completely unusable. > > > Since this makes the machine completely unusable, and since it is not > > happening on 2.4.10pre8 I guess it is a bug ;-) > > > 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. Incidentally the first time I reproduced it here was after the tlb shootdown patch from Ben was introduced, never reproduced it here previously with only my changes. However it is possibly just a coincidence.
> > Andrea, you may want to spend some time auditing > your VM like has been done with the other 2.4 VM. > > cheers, > > Rik > -- > IA64: a worthy successor to the i860. > > http://www.surriel.com/ > http://www.conectiva.com/ http://distro.conectiva.com/ > >
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