On Fri, 15 Jun 2018, Vitaly Kuznetsov wrote:
> * Fills in gva_list starting from offset. Returns the number of items added.
> @@ -93,10 +95,19 @@ static void hyperv_flush_tlb_others(const struct cpumask
> *cpus,
> if (cpumask_equal(cpus, cpu_present_mask)) {
> flush->flags |= HV_FLUSH_ALL_PROCESSORS;
> } else {
> + /*
> + * It is highly likely that VP ids are in ascending order
> + * matching Linux CPU ids; Check VP index for the highest CPU
> + * in the supplied set to see if EX hypercall is required.
> + * This is just a best guess but should work most of the time.
TLB flushing based on 'best guess' and 'should work most of the time' is
not a brilliant approach.
Thanks,
tglx
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