Re: Severe Linux 2.4 kernel memory leakage

From: Andi Kleen (ak@muc.de)
Date: Sun Nov 25 2001 - 12:03:10 EST


"Peter T. Breuer" <ptb@it.uc3m.es> writes:

> "A month of sundays ago Chris Chabot wrote:"
> > The box has ran Redhat 7.1 and 7.2, with plain vanilla linux kernels
> > 2.4.9 upto 2.4.15, in all situations the same problem appeared.
> >
> > The problem is that when the box boots up, it uses about 60Mb of memory.
> > However after only 1 1/2 days, the memory usage is already around 430Mb
> > (!!). (this is ofcource used - buffers - cache, as displayed by 'free').
>
> I also have this problem. Unknown circumstances provoke it. Kernel
> 2.4.9 to 2.4.13. When it occurs I lose about 30MB a day.

Compare snapshots of /proc/slabinfo before and after.

It may be completely harmless; e.g. a slab cache. free is unfortunately
quite misleading with newer kernels; it doesn't give information about
many important caches (e.g. not about the slab caches)

-Andi

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This archive was generated by hypermail 2b29 : Fri Nov 30 2001 - 21:00:19 EST