Nicholas Piggin <npig...@gmail.com> writes:
> When the mm is being torn down there will be a full PID flush so
> there is no need to flush the TLB on page size changes.
and that tlb flush is PID flush since tlb->fulmm is set? So this avoids
multiple PID tlb flush.
Reviewed-by: Aneesh Kumar K.V <aneesh.ku...@linux.ibm.com>
>
> Signed-off-by: Nicholas Piggin <npig...@gmail.com>
> ---
> arch/powerpc/include/asm/tlb.h | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/arch/powerpc/include/asm/tlb.h b/arch/powerpc/include/asm/tlb.h
> index 5d3107f2b014..d1b3dc4a6a0a 100644
> --- a/arch/powerpc/include/asm/tlb.h
> +++ b/arch/powerpc/include/asm/tlb.h
> @@ -84,6 +84,9 @@ static inline void __tlb_remove_tlb_entry(struct mmu_gather
> *tlb, pte_t *ptep,
> static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb,
> unsigned int page_size)
> {
> + if (tlb->fullmm)
> + return;
> +
> if (!tlb->page_size)
> tlb->page_size = page_size;
> else if (tlb->page_size != page_size) {
> --
> 2.17.0
