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 86DF8D2F000 for ; Tue, 27 Jan 2026 12:16:40 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id BADFE6B0092; Tue, 27 Jan 2026 07:16:39 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id B36FB6B0093; Tue, 27 Jan 2026 07:16:39 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A5B026B0095; Tue, 27 Jan 2026 07:16:39 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 969E86B0092 for ; Tue, 27 Jan 2026 07:16:39 -0500 (EST) Received: from smtpin20.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 618A013C128 for ; Tue, 27 Jan 2026 12:16:39 +0000 (UTC) X-FDA: 84377642118.20.EC5D72F Received: from out-171.mta1.migadu.com (out-171.mta1.migadu.com [95.215.58.171]) by imf01.hostedemail.com (Postfix) with ESMTP id D759C4000B for ; Tue, 27 Jan 2026 12:16:37 +0000 (UTC) Authentication-Results: imf01.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=sFZyeoHJ; spf=pass (imf01.hostedemail.com: domain of qi.zheng@linux.dev designates 95.215.58.171 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=1769516198; 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=fkW1q5oTlkchrLBj7uhW1/fyT/NJTp0qrNRVsGoiJYg=; b=DboJAacrcn/jO8kfw/vSICnB+ehe1quoL/i7OczLcqaxPk81FjhHJG3ylN3J+J70Hewu03 Uags5eYwwVCevinunTIpCZ2ffBdUtQPRNChlopNHI+xRKpT7A+7OJ2fF5Ee0hn+sNxpdAL +gEiGWP2g3o+aJfBEPKvISjtHHasUPg= ARC-Authentication-Results: i=1; imf01.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=sFZyeoHJ; spf=pass (imf01.hostedemail.com: domain of qi.zheng@linux.dev designates 95.215.58.171 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=1769516198; a=rsa-sha256; cv=none; b=iyMpTV3QwPLZpQDQOkLN8rsIvs/DzNz01Y4LviUsqGX4oXCq0SV0hjMFf6akXLkhy/ivk/ 0WXpCVAe3yQZI0drdhu6QgJH2EHg4xfAlbbyoDxT3FJ/9aAxhPO54I/y7kkpTfiAEm8b05 SuJyBhZk3eEVccZcXkavirTahRvN6rs= 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=1769516194; 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=fkW1q5oTlkchrLBj7uhW1/fyT/NJTp0qrNRVsGoiJYg=; b=sFZyeoHJIKbye9uwcywAcpjl2xzdJccXUsdUJIt0TNtOYHgA7a208ZAIF7HqUNMoKtlbs6 TW0o13FMFBrSCMFPpUnlYGDJlzuL1Fr0k5t+5kHxBoiaDB3yOgkQV/YzB2ftvcx1Aazeg3 1xj0enzbG3UIgCeH+LduDr8+xkNa3bA= 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 , Thomas Bogendoerfer Subject: [PATCH v4 4/8] mips: mm: enable MMU_GATHER_RCU_TABLE_FREE Date: Tue, 27 Jan 2026 20:12:57 +0800 Message-ID: <0d17f00a724f77aaca2da7c847acd490c3a47571.1769515122.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: rspam01 X-Rspamd-Queue-Id: D759C4000B X-Stat-Signature: kzp1dxkq7fxxnagythjp71w78gryao1w X-Rspam-User: X-HE-Tag: 1769516197-862708 X-HE-Meta: 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 5JyZOdhs ZtlLRhLSaCeN9KaM= 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 b88b97139fa8e..c0c94e26ce396 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 7a04381efa0b5..895bf79e76762 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 @@ -97,7 +96,7 @@ 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