Linus's incremental min will protect ZONE_DMA in the same manner.
> and you're totally wrong saying that mlocking 700m on a 4G box
> could kill it.
It is possible to mlock 700M of the normal zone on a 4G -aa kernel.
I can't immediately think of anything apart from vma's which will
make it fall over, but it will run like crap.
> 2.5 misses this important fix too btw.
It does not appear to be an important fix at all. There have been
zero reports of it on any mailing list which I read since the google
days.
Yes, it needs to be addressed. But it is not worth taking 100 megabytes
of pagecache away from everyone. That is just a matter of choosing
the default value.
2.5 has much bigger problems than this - radix_tree nodes and pte_chains
in particular.
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