| Date | Mon, 20 Aug 2007 13:32:05 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: [patch 01/23] Fall back on interrupt disable in cmpxchg8b on 80386 and 80486 |
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On Mon, 20 Aug 2007, Mathieu Desnoyers wrote:
> already present in cmpxchg_386_u32 tells much about how this cmpxchg > implementation should not be used in a SMP context. However, the cmpxchg_local > can perfectly use this fallback, since it only needs to be atomic wrt the local > cpu.
Do you have an example where the use of cmpxchg_local is a performance benefit when actually used in code? cmpxchg is already problematic functionality since it is not available on all platforms. - 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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