On Fri, Dec 30, 2005 at 11:42:34PM +0100, Peter Zijlstra wrote:

From: Nick Piggin <redacted>

Explicitly teach kswapd about the incremental min logic instead of just scanning
all zones under the first low zone. This should keep more even pressure applied
on the zones.

The new shrink_zone() logic exposes the very worst side of the current
balance_pgdat() function. Without this patch reclaim is limited to ZONE_DMA.

Can you please describe the issue with over protection of DMA zone you experienced?

I'll see if I can reproduce it with Nick's standalone patch on top of vanilla, what
load was that?

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