Re: [PATCH] SLUB: revert direct page allocator pass through

From: Christoph Lameter
Date: Fri Jan 23 2009 - 11:02:53 EST

On Sat, 24 Jan 2009, Nick Piggin wrote:

> Page allocator is never going to be as fast as slab allocator, for
> issues I explained a long time ago. Not to say it can't be improved,
> just stating facts.

Why not? Remember the discussion we had a while ago. You can bring the
pages into a state where minimal manipulations are required for alloc free
and avoid all the checks in the hot paths. The SLUB method could be used
taking a big contiguous chunk and then issueing page size portions of it.
That could be quite fast.

Or if you prefer order-0. Do a single linked list like SLQB does.

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