Re: [PATCH] x86 idle: repair large-server 50-watt idle-power regression
On Thu, Dec 19, 2013 at 06:25:35PM +0100, Peter Zijlstra wrote: > That said, I would find it very strange indeed if a CLFLUSH doesn't also > flush the store buffer.
OK, it explicitly states it does not do that and you indeed need an mfence before the clflush.