Re: [Lse-tech] Re: 10.31 second kernel compile

Martin J. Bligh (
Sun, 24 Mar 2002 22:40:34 -0800

> Frankly, all the discussion I've seen about altering page sizes
> threatens to add considerable complexity for very dubious gains.

If we don't mix page sizes, but just increase the default from
4k, does this still add a lot of complexity in your eyes? I can't
see why it would ... ?

> If someone can point at a real-world workload and say "we suck",
> and we can't fix that suckage without altering the page size then
> would that person please come forth.

I believe one of the traditional problems stated for this case is
the amount of virtual address space taken up by all the struct pages
for a machine with large amounts of memory (32-64Gb). At the moment,
the obvious choice of architecture is still 32 bit, but maybe AMD
Hammer will fix this ... Unless someone has a plan to move all those
up into highmem as well ....


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