Re: the new VMt

Andrea Arcangeli
2000-09-25T16:11:21Z

On Mon, Sep 25, 2000 at 06:02:18PM +0200, Ingo Molnar wrote:
> Frankly, how often do we allocate multi-order pages? I've just made quick

The deadlock Alan pointed out can happen also with single page allocation
if we in 2.4.x-current put a loop in GFP_KERNEL.

> ie. 99.45% of all allocations are single-page! 0.50% is the 8kb

You're right. That's why it's a waste to have so many order in the
buddy allocator. Even more now that the hashtables should be allocated
with the bootmem allocator! :) Chuck seen the slowdown of increasing
the highest order allocation in his bench. But of course in 2.2.x we can't
avoid that.

Andrea