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Re: [Xen-devel] [PATCH] x86: reduce Meltdown band-aid IPI overhead

On 01/26/2018 12:07 PM, Jan Beulich wrote:
> In case we can detect single-threaded guest processes (by checking
> whether we can account for all root page table uses locally on the vCPU
> that's running), there's no point in issuing a sync IPI upon an L4 entry
> update, as no other vCPU of the guest will have that page table loaded.
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Looks good to me, and I think the summation is pretty clear:

Acked-by: George Dunlap <george.dunlap@xxxxxxxxxx>

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