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Mon, 1 Feb 2021 13:09:43 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 5349921A2F1E3; Mon, 1 Feb 2021 13:09:43 +0100 (CET) Date: Mon, 1 Feb 2021 13:09:43 +0100 From: Peter Zijlstra To: Nadav Amit Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Nadav Amit , Andrea Arcangeli , Andrew Morton , Andy Lutomirski , Dave Hansen , Thomas Gleixner , Will Deacon , Yu Zhao , Nick Piggin , linux-csky@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, x86@kernel.org Subject: Re: [RFC 11/20] mm/tlb: remove arch-specific tlb_start/end_vma() Message-ID: References: <20210131001132.3368247-1-namit@vmware.com> <20210131001132.3368247-12-namit@vmware.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210131001132.3368247-12-namit@vmware.com> X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Sat, Jan 30, 2021 at 04:11:23PM -0800, Nadav Amit wrote: > diff --git a/include/asm-generic/tlb.h b/include/asm-generic/tlb.h > index 427bfcc6cdec..b97136b7010b 100644 > --- a/include/asm-generic/tlb.h > +++ b/include/asm-generic/tlb.h > @@ -334,8 +334,8 @@ static inline void __tlb_reset_range(struct mmu_gather *tlb) > > #ifdef CONFIG_MMU_GATHER_NO_RANGE > > -#if defined(tlb_flush) || defined(tlb_start_vma) || defined(tlb_end_vma) > -#error MMU_GATHER_NO_RANGE relies on default tlb_flush(), tlb_start_vma() and tlb_end_vma() > +#if defined(tlb_flush) > +#error MMU_GATHER_NO_RANGE relies on default tlb_flush() > #endif > > /* > @@ -362,10 +362,6 @@ static inline void tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vm > > #ifndef tlb_flush > > -#if defined(tlb_start_vma) || defined(tlb_end_vma) > -#error Default tlb_flush() relies on default tlb_start_vma() and tlb_end_vma() > -#endif #ifdef CONFIG_ARCH_WANT_AGGRESSIVE_TLB_FLUSH_BATCHING #error .... #endif goes here... > static inline void tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vma) > { > if (tlb->fullmm) > return; > > + if (IS_ENABLED(CONFIG_ARCH_WANT_AGGRESSIVE_TLB_FLUSH_BATCHING)) > + return; Also, can you please stick to the CONFIG_MMU_GATHER_* namespace? I also don't think AGRESSIVE_FLUSH_BATCHING quite captures what it does. How about: CONFIG_MMU_GATHER_NO_PER_VMA_FLUSH ?