Messages in this thread | | | Date | Fri, 15 May 2015 00:27:22 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [RFC PATCH] x86, espfix: use spin_lock rather than mutex |
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On 05/14/2015 11:54 PM, Ingo Molnar wrote: > > The only slightly subtle detail with that is to use alloc_pages_node() > with the secondary CPU's node, to make sure the espfix stack is > NUMA-local to the CPU that is going to use it. >
It doesn't hurt, although it isn't super critical as each page will be shared among 64 CPUs. The whole espfix stack is only a single cacheline long.
-hpa
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