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DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1769516203; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=8PNYJl+4luznSu7Qs41hn6BnOWw9fSYJ1f3qY5qKkjU=; b=FIbdx3KzT3ZzuPWcHXh6lZeu0knjRgXOY2FCQKsdr3pHR7oc/n8z24+0bCjEsSNByQL3i0 6SwoaMgXgtfA9BWg4CrNy8gMxJBXcNgtiljra9XdM5cxUx+WSsUy2hZfxCkH+JPhZqVh5a kHtoJcZoWzF8ijbWfD8mCP8Ts6pi/D4= From: Qi Zheng To: david@kernel.org, andreas@gaisler.com, richard.weiyang@gmail.com, will@kernel.org, peterz@infradead.org, aneesh.kumar@kernel.org, npiggin@gmail.com, dev.jain@arm.com, ioworker0@gmail.com, linmag7@gmail.com, akpm@linux-foundation.org Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-alpha@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linux-um@lists.infradead.org, sparclinux@vger.kernel.org, Qi Zheng , "James E.J. Bottomley" , Helge Deller Subject: [PATCH v4 5/8] parisc: mm: enable MMU_GATHER_RCU_TABLE_FREE Date: Tue, 27 Jan 2026 20:12:58 +0800 Message-ID: In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: F3CF980015 X-Stat-Signature: y1zj184n679m5k3aceyxhpacc7p7fqbb X-Rspam-User: X-HE-Tag: 1769516204-983021 X-HE-Meta: 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 Puoq8zVa 9skmJ2WJmP3CEFgrcnINuKG9DkvoywnmsbpWUUUz/rJ8LK4/0wSz8ezzGVf/c+UEM5EwD0NElsTYNserXwV5sIMtYp0F8gEKubKWe9oN9Eu+5xCMmUnutghZbQg9iFxm0umh/rZYm4071RosaWkx/uYGNL3LOZyxHjFIJpzB8gjbo6H98GQNtQSgQcML3HH4jCZhNNHY0/i+WqwaOQUG0BCzg30/raGoB/vUVXDRRu8uU84fiax+3KcySlWqGD2DYVJTb+B8TXOKO06Qpb2Gh9Bf1CwsjsNXzyMxxsYHicEmgGsL4lJxLm3k/SP+4aFgmZKOYFNK5df7CgIT722nNdkyvr8FFxIwTJDzR75fnomZV258= 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: List-Subscribe: List-Unsubscribe: From: Qi Zheng On a 64-bit system, madvise(MADV_DONTNEED) may cause a large number of empty PTE page table pages (such as 100GB+). To resolve this problem, first enable MMU_GATHER_RCU_TABLE_FREE to prepare for enabling the PT_RECLAIM feature, which resolves this problem. Signed-off-by: Qi Zheng Cc: "James E.J. Bottomley" Cc: Helge Deller --- arch/parisc/Kconfig | 1 + arch/parisc/include/asm/tlb.h | 4 ++-- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index 47fd9662d8005..62d5a89d5c7bc 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -79,6 +79,7 @@ config PARISC select GENERIC_CLOCKEVENTS select CPU_NO_EFFICIENT_FFS select THREAD_INFO_IN_TASK + select MMU_GATHER_RCU_TABLE_FREE select NEED_DMA_MAP_STATE select NEED_SG_DMA_LENGTH select HAVE_ARCH_KGDB diff --git a/arch/parisc/include/asm/tlb.h b/arch/parisc/include/asm/tlb.h index 44235f367674d..4501fee0a8fa4 100644 --- a/arch/parisc/include/asm/tlb.h +++ b/arch/parisc/include/asm/tlb.h @@ -5,8 +5,8 @@ #include #if CONFIG_PGTABLE_LEVELS == 3 -#define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tlb)->mm, pmd) +#define __pmd_free_tlb(tlb, pmd, addr) tlb_remove_ptdesc((tlb), virt_to_ptdesc(pmd)) #endif -#define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, pte) +#define __pte_free_tlb(tlb, pte, addr) tlb_remove_ptdesc((tlb), page_ptdesc(pte)) #endif -- 2.20.1