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 D8F9DCE7AB9 for ; Fri, 14 Nov 2025 11:13:42 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 3C7878E0009; Fri, 14 Nov 2025 06:13:42 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 3780B8E0002; Fri, 14 Nov 2025 06:13:42 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 266A38E0009; Fri, 14 Nov 2025 06:13:42 -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 1205C8E0002 for ; Fri, 14 Nov 2025 06:13:42 -0500 (EST) Received: from smtpin10.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id A75DB4CCE8 for ; Fri, 14 Nov 2025 11:13:41 +0000 (UTC) X-FDA: 84108952242.10.1124601 Received: from out-172.mta0.migadu.com (out-172.mta0.migadu.com [91.218.175.172]) by imf05.hostedemail.com (Postfix) with ESMTP id F13C410000C for ; Fri, 14 Nov 2025 11:13:39 +0000 (UTC) Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=ahulCYKl; spf=pass (imf05.hostedemail.com: domain of qi.zheng@linux.dev designates 91.218.175.172 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=1763118820; 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=QEefGr34jCXytLhrSj7xX2XGq0Zan5wY+b22XB//Qmo=; b=fKTVz3wAtGtTejJ77upKRszvaqzRgoCn1+l2m6e05LdAcmPmPAry4xf8gRzz7E392FYInH 2+XHYN+4t2pbmhnEdkoaL0jRcEiLdIVOEAD57HWmhfjzA4HMGFB6URZhskTAqfA04wloHn 2nBdAkqhgwIiZH2BgNU0brjxWAY3Vgc= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1763118820; a=rsa-sha256; cv=none; b=mL/GeUoAucFp4k3AxNJylArUms3K6gaqOTHMgehIlHpP3MxSt5MZu7I1Bsen/jXPWAWrCx qOjkn+WYcNICACCnTUCOQxbjNUUOrgMhtQ2Pb8oC3v5sunMb22gLDA8KZL84QzVrdk1Tkr mYG+rLwZZQZMp+MrM3GDFoQ0narEGcQ= ARC-Authentication-Results: i=1; imf05.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=ahulCYKl; spf=pass (imf05.hostedemail.com: domain of qi.zheng@linux.dev designates 91.218.175.172 as permitted sender) smtp.mailfrom=qi.zheng@linux.dev; dmarc=pass (policy=none) header.from=linux.dev 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=1763118818; 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=QEefGr34jCXytLhrSj7xX2XGq0Zan5wY+b22XB//Qmo=; b=ahulCYKl1T8/1EigkwF90o/vnGsd/SAoByvuSZpMwweuYRBk2FeVT2gsJ/dzEfCsjfcpLo mpzn6A8+HWUhO2EAEW8sql75SXT+7QKV88bnfAPoO9rKIxep+P5dEjCwnXn6+B9LQj02Kb jUh7PSOGRzsLU0M33QU2JbDlxuvcAFE= 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 , Richard Henderson , Matt Turner Subject: [PATCH 1/7] alpha: mm: enable MMU_GATHER_RCU_TABLE_FREE Date: Fri, 14 Nov 2025 19:11:15 +0800 Message-ID: <66cd5b21aecc3281318b66a3a4aae078c4b9d37b.1763117269.git.zhengqi.arch@bytedance.com> In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Stat-Signature: qh9uomn99wfhmeib484q88gx9sbs9zcy X-Rspam-User: X-Rspamd-Queue-Id: F13C410000C X-Rspamd-Server: rspam01 X-HE-Tag: 1763118819-18964 X-HE-Meta: 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 5U6SCILr yryINhJ7mgWXFpLdx+X4KT3fnsAHSmcy017MzwKJuk2F3VS6zucCOz2XgCotxJoFX2OX5ghzmhgFA4U45j3mwDgkHHbw8ZGhHpkPdcEsBYaiH1B5zMfGl5KlH37kIePbfjCXCe4crmCoZhBBURfDrCjNgfcd2CsTEgxIGG+yP+FO7B9L7SrLmNkZ8/OKFCua/SFaxXUiPl60epVRqgOYaME+weT3rNKvzxEiT4JVPXRpLsi1vkPZpU+R+hizrIYP2v0qACUE7bw5RHiJpvo9F2m5s4INm6+0QpnhemXnjsnSgx2rGSDh7jacdWrupZU7VVz36 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: Richard Henderson Cc: Matt Turner --- arch/alpha/Kconfig | 1 + arch/alpha/include/asm/tlb.h | 8 +++++--- 2 files changed, 6 insertions(+), 3 deletions(-) diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index 80367f2cf821c..681ed894d9e72 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -40,6 +40,7 @@ config ALPHA select MMU_GATHER_NO_RANGE select SPARSEMEM_EXTREME if SPARSEMEM select ZONE_DMA + select MMU_GATHER_RCU_TABLE_FREE help The Alpha is a 64-bit general-purpose processor designed and marketed by the Digital Equipment Corporation of blessed memory, diff --git a/arch/alpha/include/asm/tlb.h b/arch/alpha/include/asm/tlb.h index 4f79e331af5ea..4fe5a901720f0 100644 --- a/arch/alpha/include/asm/tlb.h +++ b/arch/alpha/include/asm/tlb.h @@ -4,7 +4,9 @@ #include -#define __pte_free_tlb(tlb, pte, address) pte_free((tlb)->mm, pte) -#define __pmd_free_tlb(tlb, pmd, address) pmd_free((tlb)->mm, pmd) - +#define __pte_free_tlb(tlb, pte, address) \ + tlb_remove_ptdesc((tlb), page_ptdesc(pte)) +#define __pmd_free_tlb(tlb, pmd, address) \ + tlb_remove_ptdesc((tlb), virt_to_ptdesc(pmd)) + #endif -- 2.20.1