Re: [PATCH] x86 idle: repair large-server 50-watt idle-power regression

From: H. Peter Anvin
Date: Thu Dec 19 2013 - 13:10:07 EST


On 12/19/2013 09:07 AM, Ingo Molnar wrote:
>
> Likewise, having a barrier before the MONITOR looks sensible as well.
> Having it _after_ monitor looks weird and is probably wrong. [It might
> have been the effects of someone seeing the spurious wakeup problems
> with realizing the true source, or so.]
>

Does anyone know the history of this barrier after the monitor? I know
Len is looking for a minimal patchset that can go into -stable, and it
seems prudent to not preturb the code more than necessary, but going
forward it would be nice to know...

-hpa


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/