Re: [PATCH][RFC] slub: increasing order reduces memory usage of somekey caches

From: Christoph Lameter
Date: Wed Jul 16 2008 - 10:47:49 EST

Vegard Nossum wrote:

> Hm, I don't think so? I thought that those 1 and 2 were not orders,
> but in fact the number of pages. Which seems correct, since now you
> have 4096 / 208 = 19 :-)

Makes sense. So the problem is that for some reason his kernel chose order 0 for dentries. Mine choose order 1 and everything was fine. Maybe related to the number of processors (my box has 8)? We added some logic in 2.6.26 to increase slab sizes if lots of processors are present.
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