Messages in this thread | | | Date | Tue, 21 Aug 2007 16:17:16 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: [PATCH] SLUB use cmpxchg_local |
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On Tue, 21 Aug 2007, Mathieu Desnoyers wrote:
> SLUB Use cmpxchg() everywhere. > > It applies to "SLUB: Single atomic instruction alloc/free using > cmpxchg".
> +++ slab/mm/slub.c 2007-08-20 18:42:28.000000000 -0400 > @@ -1682,7 +1682,7 @@ redo: > > object[c->offset] = freelist; > > - if (unlikely(cmpxchg_local(&c->freelist, freelist, object) != freelist)) > + if (unlikely(cmpxchg(&c->freelist, freelist, object) != freelist)) > goto redo; > return; > slow:
Ok so regular cmpxchg, no cmpxchg_local. cmpxchg_local does not bring anything more? My measurements did not show any difference. I measured on Athlon64. What processor is being used?
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