On 18/03/2019 13:11, Juergen Gross wrote:
> Instead of freeing percpu areas during suspend and allocating them
> again when resuming keep them. Only free an area in case a cpu didn't
> come up again when resuming.
>
> Signed-off-by: Juergen Gross <jgr...@suse.com>

Hmm - this is slightly problematic, given the dual nature of this code.

I agree that it this change is beneficial for the suspend case, but it
is a problem when we are parking an individual CPU for smt=0 or
xen-hptool reasons.

Do we have any hint we can use when taking the CPU down as to whether
we're expecting it to come straight back up again?

~Andrew

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