Messages in this thread | | | Date | Wed, 20 Jun 2007 09:14:43 +0300 (EEST) | From | Pekka J Enberg <> | Subject | Re: [patch 05/26] Slab allocators: Cleanup zeroing allocations |
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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. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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