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 9D63DCE7AB9 for ; Fri, 14 Nov 2025 11:13:58 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id F13128E0012; Fri, 14 Nov 2025 06:13:57 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id EC3928E0002; Fri, 14 Nov 2025 06:13:57 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DB22C8E0012; Fri, 14 Nov 2025 06:13:57 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id C5C068E0002 for ; Fri, 14 Nov 2025 06:13:57 -0500 (EST) Received: from smtpin10.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 8C12316032C for ; Fri, 14 Nov 2025 11:13:57 +0000 (UTC) X-FDA: 84108952914.10.66474BE Received: from out-186.mta0.migadu.com (out-186.mta0.migadu.com [91.218.175.186]) by imf09.hostedemail.com (Postfix) with ESMTP id C4F0D14000E for ; Fri, 14 Nov 2025 11:13:55 +0000 (UTC) Authentication-Results: imf09.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b="iw/rnvl+"; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf09.hostedemail.com: domain of qi.zheng@linux.dev designates 91.218.175.186 as permitted sender) smtp.mailfrom=qi.zheng@linux.dev ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1763118836; a=rsa-sha256; cv=none; b=gdV4xDv8OERfJRg5a3oFelJ2xjarlKYySoYhPn8ulpsSn+T3fZMCRkR2MQQxDdkczru7mY /pb+kn3qb1Qzc+n9ywYZbrvbyJMvlaT3867NEbL27IxwRWWCKI+JddBIjnHyr6hr2m/j+I tOrVaAMm/Nj9AekVnOpbSHnLpS4KYS4= ARC-Authentication-Results: i=1; imf09.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b="iw/rnvl+"; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf09.hostedemail.com: domain of qi.zheng@linux.dev designates 91.218.175.186 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=1763118835; 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=xE2z7TAxeJ/1HQSzhHJnzUcYxbE0hsI+5X32zwVc0VI=; b=VXwMeJPiIFWbh0Bw1fpcI2aAg4iyFEqWEogN5/rYYt52bAwI4MvZC45rda1oPJhBo8cW0A Iwbzje/wdWwgBOOP9aYK15TyKoUsVnlA17DU3eVQPjqcfqbU2tKGKGXPxYs5Ct1x5WBbO/ QGt+NKU2TJaryTgNMrrIQKqbxsVElAQ= 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=1763118834; 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=xE2z7TAxeJ/1HQSzhHJnzUcYxbE0hsI+5X32zwVc0VI=; b=iw/rnvl+mSTQwZ1VtfwsUIUgZEgEWYMoBXUqNckA12rFzs5wwBw1DfEnB9VXrBAiN5lBA2 +WL6SCJD5yzsK1tlWnajFGyhDa2TXm27uAcag6i4H/j/tdwWGVq+UdZZjcaWuNr4dD50wD yUns3WW5Fq1s6Y/AV0bEqLTbFKSi9Ds= 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@redhat.com, ioworker0@gmail.com Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.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 4/7] mips: mm: enable MMU_GATHER_RCU_TABLE_FREE Date: Fri, 14 Nov 2025 19:11:18 +0800 Message-ID: In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: C4F0D14000E X-Stat-Signature: b1ccudrrjprsfcw1m5e1mgmczmmyrzgn X-Rspam-User: X-HE-Tag: 1763118835-711916 X-HE-Meta: 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 wDx7M1IX K9EphatF7i1Ht/X2lxJ2ptu66NOh1+44O65fTf+64qWYWGmmtoFXwtzF8k9Lca8uJ6jAz/6/ijFlXiU8pGPLQM/1MZ8/4Tx5muRL+8FZCRO9aLurp/rCD07rq3C4yUrWC79qZnCdJ8DkTAECn02EdI2sLgGtOljHI4EOwIwdE/KlToL0G5btYnfCIQmWMqK5DfWIoXxYZRjpWe9npBoEnyvZETzjh7uSw7qVegAWzkI5GYaia73uQM1SwCrdOV5KWa090/mtIk7vg02o= 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 | 6 ++++-- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index e8683f58fd3e2..0ee8820a354c4 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -108,6 +108,7 @@ config MIPS select TRACE_IRQFLAGS_SUPPORT select ARCH_HAS_ELFCORE_COMPAT select HAVE_ARCH_KCSAN if 64BIT + select MMU_GATHER_RCU_TABLE_FREE config MIPS_FIXUP_BIGPHYS_ADDR bool diff --git a/arch/mips/include/asm/pgalloc.h b/arch/mips/include/asm/pgalloc.h index 942af87f1cddb..c00f445045f43 100644 --- a/arch/mips/include/asm/pgalloc.h +++ b/arch/mips/include/asm/pgalloc.h @@ -72,7 +72,8 @@ 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 +99,8 @@ 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