On 05/15/2015 12:27 AM, H. Peter Anvin wrote:
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.
I don't think we actually need these pages allocated until we try to run
user code. Can we move this very late in initialization instead?
--Andy
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