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SubjectRe: Out of Memory: Killed process 16498 (java).
On Thu, Jan 19, 2006 at 05:49:20PM -0800, Andrew Morton wrote:
> Dave Jones <davej@redhat.com> wrote:
> >
> > The Fedora user in the bug report
> > https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=175173
> > who on x86-64 with 5GB saw zone_dma exhausted saw a similar result,
> > delays the kill, but it does still happen.
>
> Again, that person's ZONE_DMA has *zero* pages on the LRU. Something has
> consumed all of the piddling little zone for kernel data structures. It is
> a true oom.
>
> We need to work out who is using all this ZONE_DMA memory and make them
> stop it.

It reminds me, we had a similar problem in the 2.4.x kernel with
many SCSI hosts loaded - that caused scsi_malloc (which uses DMA)
to consume a lot of DMA memory and trigger the OOM. I know that code
was much rewritten for 2.6.x, through DMA allocations in the SCSI
subsystem (regardless of drivers) still exist here and there.

--
Dan Aloni
da-x@monatomic.org, da-x@colinux.org, da-x@gmx.net, dan@xiv.co.il
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