Subject: Re: [PATCH v11 4/4] arm64: support batched/deferred tlb shootdown during page reclamation/migration

From: Catalin Marinas <[email-masked]>
Date: Fri, 21 Jul 2023 19:25:05 +0100

On Mon, Jul 17, 2023 at 09:10:04PM +0800, Yicong Yang wrote:
> +static inline void arch_tlbbatch_add_pending(struct arch_tlbflush_unmap_batch *batch,
> +					     struct mm_struct *mm,
> +					     unsigned long uaddr)
> +{
> +	__flush_tlb_page_nosync(mm, uaddr);
> +}
> +
> +static inline void arch_flush_tlb_batched_pending(struct mm_struct *mm)
> +{
> +	dsb(ish);
> +}
> +
> +static inline void arch_tlbbatch_flush(struct arch_tlbflush_unmap_batch *batch)
> +{
> +	dsb(ish);
> +}

Nitpick: as an additional patch, I'd add some comment for these two
functions that the TLBI has already been issued and only a DSB is needed
to synchronise its effect on the other CPUs.

Reviewed-by: Catalin Marinas <[email-masked]>