Re: [Lhms-devel] [PATCH 0/7] Fragmentation Avoidance V19

Linus Torvalds
2005-11-04T01:06:26Z

On Fri, 4 Nov 2005, Nick Piggin wrote:
>
> Looks like ppc64 is getting 64K page support, at which point higher
> order allocations (eg. for stacks) basically disappear don't they?

Yes and no, HOWEVER, nobody sane will ever use 64kB pages on a
general-purpose machine.

64kB pages are _only_ usable for databases, nothing else.

Why? Do the math. Try to cache the whole kernel source tree in 4kB pages
vs 64kB pages. See how the memory usage goes up by a factor of _four_.

Linus