From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3100FD6552C for ; Wed, 17 Dec 2025 09:47:12 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 88A586B008C; Wed, 17 Dec 2025 04:47:11 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 834D86B0092; Wed, 17 Dec 2025 04:47:11 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 712846B0093; Wed, 17 Dec 2025 04:47:11 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 5B6216B008C for ; Wed, 17 Dec 2025 04:47:11 -0500 (EST) Received: from smtpin25.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 19F45BBB32 for ; Wed, 17 Dec 2025 09:47:11 +0000 (UTC) X-FDA: 84228484662.25.C340926 Received: from out-180.mta1.migadu.com (out-180.mta1.migadu.com [95.215.58.180]) by imf28.hostedemail.com (Postfix) with ESMTP id 74D74C0013 for ; Wed, 17 Dec 2025 09:47:09 +0000 (UTC) Authentication-Results: imf28.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=brOaZf2K; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf28.hostedemail.com: domain of qi.zheng@linux.dev designates 95.215.58.180 as permitted sender) smtp.mailfrom=qi.zheng@linux.dev ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1765964829; a=rsa-sha256; cv=none; b=WXylHfaLVdSeK7HMKTJT5emwqfSgEKxzA3S+ukwdkzolMX5HXqwxNYvuT+q2TZWVfeWsqe uv9Or2GL9loVLKAEIFv7efDsP3SjbvL+ka+O06rRL/FGSDI4uUdJBLEHyuOziHG13eXslY lpTfPa/oVBoPQvjSobhJwKsa42IVoWE= ARC-Authentication-Results: i=1; imf28.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=brOaZf2K; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf28.hostedemail.com: domain of qi.zheng@linux.dev designates 95.215.58.180 as permitted sender) smtp.mailfrom=qi.zheng@linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1765964829; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=WjvVUE6PLFuQKn8iudCm/UQAhzXxbds5MAnD30p0biw=; b=pUcNWwarR1yTaIZ1wpMZqEDWq1Xwp0KvRlRo6isQpaXWw5xOfonsqqFSYJr7XJ76FlabcQ 6iG+Ty3oMlPu1tnWiVFQemYr0iGXeBSJ8CIrV4ZtGrUqH/42jxB++8HJ5dV9dXVAfNB6Mm baTpOKrzZgA9hjUB4D639WeSi5ydwag= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1765964827; 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=WjvVUE6PLFuQKn8iudCm/UQAhzXxbds5MAnD30p0biw=; b=brOaZf2K2ad6KJwOD2w1YutexFLGuWsWBcWsSFSW9Rhbh0uxRAqynp0B/EeXVhrva+cXWe gZB0oCXryrPE12cWqlsQwhYB5Dx/EC0LkrSQOTkvtYLvI3X0HBt+KxidI0BnlqQYnQoYUU wdwCgfkrV6k+l3/j3AAJV14uDlUcyGw= From: Qi Zheng To: will@kernel.org, aneesh.kumar@kernel.org, npiggin@gmail.com, peterz@infradead.org, dev.jain@arm.com, akpm@linux-foundation.org, david@kernel.org, ioworker0@gmail.com, linmag7@gmail.com 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, Qi Zheng , Huacai Chen , WANG Xuerui Subject: [PATCH v3 3/7] LoongArch: mm: enable MMU_GATHER_RCU_TABLE_FREE Date: Wed, 17 Dec 2025 17:45:44 +0800 Message-ID: In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 74D74C0013 X-Stat-Signature: q4jxz9wz3ntzf367re385xdu3wnj8b7r X-Rspam-User: X-HE-Tag: 1765964829-847237 X-HE-Meta: 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 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: Huacai Chen Cc: WANG Xuerui --- arch/loongarch/Kconfig | 1 + arch/loongarch/include/asm/pgalloc.h | 7 +++---- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 730f342145197..43d5b863e1fb2 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -187,6 +187,7 @@ config LOONGARCH select IRQ_LOONGARCH_CPU select LOCK_MM_AND_FIND_VMA select MMU_GATHER_MERGE_VMAS if MMU + select MMU_GATHER_RCU_TABLE_FREE select MODULES_USE_ELF_RELA if MODULES select NEED_PER_CPU_EMBED_FIRST_CHUNK select NEED_PER_CPU_PAGE_FIRST_CHUNK diff --git a/arch/loongarch/include/asm/pgalloc.h b/arch/loongarch/include/asm/pgalloc.h index 08dcc698ec184..248f62d0b590e 100644 --- a/arch/loongarch/include/asm/pgalloc.h +++ b/arch/loongarch/include/asm/pgalloc.h @@ -55,8 +55,7 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm) return pte; } -#define __pte_free_tlb(tlb, pte, address) \ - tlb_remove_ptdesc((tlb), page_ptdesc(pte)) +#define __pte_free_tlb(tlb, pte, address) tlb_remove_ptdesc((tlb), page_ptdesc(pte)) #ifndef __PAGETABLE_PMD_FOLDED @@ -79,7 +78,7 @@ static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) return pmd; } -#define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x) +#define __pmd_free_tlb(tlb, x, addr) tlb_remove_ptdesc((tlb), virt_to_ptdesc(x)) #endif @@ -99,7 +98,7 @@ static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address) return pud; } -#define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x) +#define __pud_free_tlb(tlb, x, addr) tlb_remove_ptdesc((tlb), virt_to_ptdesc(x)) #endif /* __PAGETABLE_PUD_FOLDED */ -- 2.20.1