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 84BBECE7AB9 for ; Fri, 14 Nov 2025 11:13:53 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id DB2F28E000C; Fri, 14 Nov 2025 06:13:52 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id D631F8E0002; Fri, 14 Nov 2025 06:13:52 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C520F8E000C; Fri, 14 Nov 2025 06:13:52 -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 B07068E0002 for ; Fri, 14 Nov 2025 06:13:52 -0500 (EST) Received: from smtpin04.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 4EF5A4BA07 for ; Fri, 14 Nov 2025 11:13:52 +0000 (UTC) X-FDA: 84108952704.04.FCE958C Received: from out-178.mta0.migadu.com (out-178.mta0.migadu.com [91.218.175.178]) by imf17.hostedemail.com (Postfix) with ESMTP id 9A97640012 for ; Fri, 14 Nov 2025 11:13:50 +0000 (UTC) Authentication-Results: imf17.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=Y9ji6TET; spf=pass (imf17.hostedemail.com: domain of qi.zheng@linux.dev designates 91.218.175.178 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=1763118830; 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=2CgIQM8Rm+rrIBZ65Gc8uDgVfjAkTSjqf1Ed4GSiWMI=; b=zNEbvITZNKcderLH2cq/vQp1hCmVsTg4NAxCh3EHN5RYajWlGgEHhgg8XpediVMBrx4cOu LxUc0vl4z53klE3/arVn7YGr5IDa+q6wMS7YvkgPKiu2U25YOU48FaxjHQoFXxaQ0dF6YZ bNYMj91qgaHWEedi9rHm+TwStzcgNao= ARC-Authentication-Results: i=1; imf17.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=Y9ji6TET; spf=pass (imf17.hostedemail.com: domain of qi.zheng@linux.dev designates 91.218.175.178 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=1763118830; a=rsa-sha256; cv=none; b=VbWdlc5tc4PaDIUDDc1esGWZuWGug2q7hgc/pzRlQqpZKD5h8LMcIUBVgch8f64ArmaVIj Op7lfvTlJGHx3m58riftZ0zfDtEFe3JqCM1bjmACJ1VSuIO+kES8VjEtqVVWidNLg0+rRo pqIe1xCxccNG73YV+QLBycnZc1QK+n8= 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=1763118828; 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=2CgIQM8Rm+rrIBZ65Gc8uDgVfjAkTSjqf1Ed4GSiWMI=; b=Y9ji6TETXOEdJtN7riEZs1egBNIfxqbBF5em7JWsQrRQR5gaeRiytwZ+sxyYdN3yN2wb0q Cp2WEDEqOTCXmA8Q46TPNk2xSPagvU9B7BFxShiJtemzQIQxjnYV6Z0rYNSFwfadUPgSEc hGyB5DAs7t2eEqKZwitvuD99nlUBcqs= 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 , Huacai Chen , WANG Xuerui Subject: [PATCH 3/7] loongarch: mm: enable MMU_GATHER_RCU_TABLE_FREE Date: Fri, 14 Nov 2025 19:11:17 +0800 Message-ID: <146b5a0207052b38d04caac6b20756a61c2189b3.1763117269.git.zhengqi.arch@bytedance.com> In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspamd-Queue-Id: 9A97640012 X-Stat-Signature: wxok6bemujux6jxhp1y4wunne3nn8ean X-Rspamd-Server: rspam02 X-Rspam-User: X-HE-Tag: 1763118830-191353 X-HE-Meta: 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 cZxje+am fDFgCUKADhKNjrWKBBzFfkPWbSAt6xAhM4ugtezl/PES6qT6atjo/IkmL7deMQ9MRCI8+5YLxZHH3eZfIZdD/Px4FG4HEtqa1sXbpLuoqa225FKpWPgob+cCtbDQp1JhU4f9SRTKCy9rqwONxws4r+caOn+ySCkAxzlp+BAC6ehxYHVe42LCN+cU0oHmJtR6RBH91UR1cZvcsu7mx46akw3eVVg== 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 | 6 ++++-- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 5b1116733d881..3bf2f2a9cd647 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -210,6 +210,7 @@ config LOONGARCH select USER_STACKTRACE_SUPPORT select VDSO_GETRANDOM select ZONE_DMA32 + select MMU_GATHER_RCU_TABLE_FREE config 32BIT bool diff --git a/arch/loongarch/include/asm/pgalloc.h b/arch/loongarch/include/asm/pgalloc.h index 1c63a9d9a6d35..0539d04bf1525 100644 --- a/arch/loongarch/include/asm/pgalloc.h +++ b/arch/loongarch/include/asm/pgalloc.h @@ -79,7 +79,8 @@ 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 @@ -99,7 +100,8 @@ 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