Messages in this thread | | | Date | Wed, 4 Feb 2009 15:09:15 -0500 (EST) | From | Christoph Lameter <> | Subject | Re: [patch] SLQB slab allocator |
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On Wed, 4 Feb 2009, Nick Piggin wrote:
> That's very true, and we touched on this earlier. It is I guess > you can say a downside of queueing. But an analogous situation > in SLUB would be that lots of pages on the partial list with > very few free objects, or freeing objects to pages with few > objects in them. Basically SLUB will have to do the extra work > in the fastpath.
But these are pages with mostly allocated objects and just a few objects free. The SLAB case is far worse: You have N objects on a queue and they are keeping possibly N pages away from the page allocator and in those pages *nothing* is used.
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