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Wed, 05 Nov 2025 01:49:26 -0800 (PST) Received: from dw-tp ([171.76.85.117]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-ba1f765f148sm5030694a12.24.2025.11.05.01.49.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Nov 2025 01:49:25 -0800 (PST) From: Ritesh Harjani (IBM) To: Kevin Brodsky , linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, Kevin Brodsky , Alexander Gordeev , Andreas Larsson , Andrew Morton , Boris Ostrovsky , Borislav Petkov , Catalin Marinas , Christophe Leroy , Dave Hansen , David Hildenbrand , "David S. Miller" , David Woodhouse , "H. Peter Anvin" , Ingo Molnar , Jann Horn , Juergen Gross , "Liam R. Howlett" , Lorenzo Stoakes , Madhavan Srinivasan , Michael Ellerman , Michal Hocko , Mike Rapoport , Nicholas Piggin , Peter Zijlstra , Ryan Roberts , Suren Baghdasaryan , Thomas Gleixner , Vlastimil Babka , Will Deacon , Yeoreum Yun , linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org, xen-devel@lists.xenproject.org, x86@kernel.org Subject: Re: [PATCH v4 09/12] powerpc/mm: replace batch->active with in_lazy_mmu_mode() In-Reply-To: <20251029100909.3381140-10-kevin.brodsky@arm.com> Date: Wed, 05 Nov 2025 15:10:20 +0530 Message-ID: <87ldkk4y2j.ritesh.list@gmail.com> References: <20251029100909.3381140-1-kevin.brodsky@arm.com> <20251029100909.3381140-10-kevin.brodsky@arm.com> MIME-Version: 1.0 Content-Type: text/plain X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251105_085359_139401_19297FB7 X-CRM114-Status: GOOD ( 13.92 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Kevin Brodsky writes: > A per-CPU batch struct is activated when entering lazy MMU mode; its > lifetime is the same as the lazy MMU section (it is deactivated when > leaving the mode). Preemption is disabled in that interval to ensure > that the per-CPU reference remains valid. > > The generic lazy_mmu layer now tracks whether a task is in lazy MMU > mode. We can therefore use the generic helper in_lazy_mmu_mode() > to tell whether a batch struct is active instead of tracking it > explicitly. > > Signed-off-by: Kevin Brodsky > --- > arch/powerpc/include/asm/book3s/64/tlbflush-hash.h | 9 --------- > arch/powerpc/mm/book3s64/hash_tlb.c | 2 +- > 2 files changed, 1 insertion(+), 10 deletions(-) > This looks good to me. Reviewed-by: Ritesh Harjani (IBM)