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SubjectRe: 2.4.>=13 VM/kswapd/shmem/Oracle issue (was Re: Google's mm problems)
On Sun, Nov 18, 2001 at 07:17:02AM +0100, Mike Galbraith wrote:
> On Sat, 17 Nov 2001, Andrea Arcangeli wrote:
> > If all your hardware is PCI nobody will make an allocation from the
> > ZONE_DMA classzone and so kswapd will never loop on the ZONE_DMA, as
> > instead can happen with -ac as soon as the ZONE_DMA becomes unfreeable
> > and under the low watermark (and "unfreeable" of course also means all
> > anon not locked memory but no swap installed in the machine).
> We don't fallback to ZONE_DMA anymore? (good)

we still fallback on the ZONE_DMA, otherwise mem=17m wouldn't boot :)

what we don't do is to try to balance the dma zone if nobody is asking
memory explicitly from the dma zone [isa users].

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