Re: [patch 05/26] Slab allocators: Cleanup zeroing allocations

[Pekka J Enberg]

On Tue, 19 Jun 2007, Matt Mackall wrote:
> > I worry a bit about adding another branch checking __GFP_ZERO in such
> > a hot path for SLAB/SLUB.

On Tue, 19 Jun 2007, Christoph Lameter wrote:
> Its checking the gfpflags variable on the stack. In a recently touched 
> cachline.

The variable could be in a register too but it's the _branch 
instruction_ that is bit worrisome especially for embedded devices (think 
slob). I haven't measured this, so consider this as pure speculation and 
hand-waving from my part.
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