> +
> +#ifdef CONFIG_PREEMPT_RT
> + /*
> + * Since flushing tlb needs expensive hypervisor call(s) on celleb,
> + * always flush it on RT to reduce scheduling latency.
> + */
> + if (machine_is(celleb)) {
> + flush_tlb_pending();
> + return;
> + }
> +#endif /* CONFIG_PREEMPT_RT */
> +
> if (i >= PPC64_TLB_BATCH_NR)
> flush_tlb_pending();
> }
Any reason to do that only on celleb ? :-)
Also, we might want to still batch, though in smaller amount. Have you measured
the time it takes ? We might want to modulate the amount based on wether we
are using native hash tables or an hypervisor.
Ben.
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