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 9666FCF2590 for ; Wed, 19 Nov 2025 07:33:16 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id F122B6B00A6; Wed, 19 Nov 2025 02:33:15 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id EC23F6B00A8; Wed, 19 Nov 2025 02:33:15 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D62D16B00A9; Wed, 19 Nov 2025 02:33:15 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id C28936B00A6 for ; Wed, 19 Nov 2025 02:33:15 -0500 (EST) Received: from smtpin13.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id 743D11A0385 for ; Wed, 19 Nov 2025 07:33:15 +0000 (UTC) X-FDA: 84126540750.13.F5A5D77 Received: from out-181.mta0.migadu.com (out-181.mta0.migadu.com [91.218.175.181]) by imf18.hostedemail.com (Postfix) with ESMTP id A6E161C0004 for ; Wed, 19 Nov 2025 07:33:13 +0000 (UTC) Authentication-Results: imf18.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=Pb5LFJ+I; spf=pass (imf18.hostedemail.com: domain of qi.zheng@linux.dev designates 91.218.175.181 as permitted sender) smtp.mailfrom=qi.zheng@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1763537593; 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=zdgUvYzcKft0e9ATGbEv1Xh5QzTrrx2Vkhg8Ynjkseo=; b=ItAnhOyF/aFOyLWEE/Ag2VJVvsrEwtgPB8LihEqByXmXCtB8kjVlN/Gn82ohp0XotgazLw /MgdNn8Pz+mJnLtw2jHxZF4UtSy1ETZJBiC59yXFUEaRBUG2P3PGMjd4ID6BS+c1iUM7Xb PDRx6uW6To6s+n2uYLzmRyDD9tEBO6U= ARC-Authentication-Results: i=1; imf18.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=Pb5LFJ+I; spf=pass (imf18.hostedemail.com: domain of qi.zheng@linux.dev designates 91.218.175.181 as permitted sender) smtp.mailfrom=qi.zheng@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1763537593; a=rsa-sha256; cv=none; b=nfqFVgop76qBRj0eObIfExdDs6BJSHdGZHeYaix+dk+J37EkNzlxfSv/9QP01F7JRdceFI S10kiR5+tTBQVFN2hHJqL1sCOWHcIwTxwTtjvuQhuf2h7gnxnrEMdzZ3jCgXxGfVRPbdz1 UAURMZ/VAmOgDzuqgP22oAzn9mWSQmY= 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=1763537588; 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=zdgUvYzcKft0e9ATGbEv1Xh5QzTrrx2Vkhg8Ynjkseo=; b=Pb5LFJ+IU/AZ2Oz4xGklQJtAr7Es3lk5E9mJtBOlpGjpEgsHLj1bdTC0GTVwKClzrR4LOK intXEaBo7Ss5/OCkxQXg0NTRpmfVxlu9kTak8I4es9WvoPUCvmE9L4Qkpx6nGAl9AKSns5 kY9KU02r2QCtq/wVBDCUyb2Auh35ZjY= 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 , Thomas Bogendoerfer Subject: [PATCH v2 4/7] mips: mm: enable MMU_GATHER_RCU_TABLE_FREE Date: Wed, 19 Nov 2025 15:31:21 +0800 Message-ID: <1ef6075dca55a0ace4a6de6350531e4bc513080e.1763537007.git.zhengqi.arch@bytedance.com> In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: A6E161C0004 X-Stat-Signature: 6b55qnhmcts9edo7qg81rpkt5zc6s3i4 X-Rspam-User: X-HE-Tag: 1763537593-679970 X-HE-Meta: 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 3rPCmHgP JHhE9D/izeY7U/wUtwo5OhIDHA/5VeLxZMi+BA5kN75K+0D/UQVXkGpRnZkQwV/C57QB5rQ6JqWnZEt6LsRrieDUl+2an3D1aMRcX0qMts6TU/CYxSxKXaL1sTv6ZJ9Z7iSuWng3BPNjmvlq4f9S7KaZe11oi4ZZVuPgvDs58PPwoeOe5TonSjJIh7GLjGZCKqunsJ/iu6xD+F6EeR0eWrL5e3wLtuEsGnUdR 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: Thomas Bogendoerfer --- arch/mips/Kconfig | 1 + arch/mips/include/asm/pgalloc.h | 7 +++---- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index e8683f58fd3e2..8b16dd4db7c08 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -99,6 +99,7 @@ config MIPS select IRQ_FORCED_THREADING select ISA if EISA select LOCK_MM_AND_FIND_VMA + select MMU_GATHER_RCU_TABLE_FREE select MODULES_USE_ELF_REL if MODULES select MODULES_USE_ELF_RELA if MODULES && 64BIT select PERF_USE_VMALLOC diff --git a/arch/mips/include/asm/pgalloc.h b/arch/mips/include/asm/pgalloc.h index 942af87f1cddb..9a7e5af16c00b 100644 --- a/arch/mips/include/asm/pgalloc.h +++ b/arch/mips/include/asm/pgalloc.h @@ -48,8 +48,7 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) extern void pgd_init(void *addr); extern pgd_t *pgd_alloc(struct mm_struct *mm); -#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 @@ -72,7 +71,7 @@ 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 @@ -98,7 +97,7 @@ static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud) set_p4d(p4d, __p4d((unsigned long)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