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 CC90BD65526 for ; Wed, 17 Dec 2025 09:47:08 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 391306B008A; Wed, 17 Dec 2025 04:47:08 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 33B316B008C; Wed, 17 Dec 2025 04:47:08 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 26F186B0092; Wed, 17 Dec 2025 04:47:08 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 1932F6B008A for ; Wed, 17 Dec 2025 04:47:08 -0500 (EST) Received: from smtpin13.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id B6026BBF10 for ; Wed, 17 Dec 2025 09:47:07 +0000 (UTC) X-FDA: 84228484494.13.0206EDF Received: from out-176.mta1.migadu.com (out-176.mta1.migadu.com [95.215.58.176]) by imf15.hostedemail.com (Postfix) with ESMTP id 72900A0006 for ; Wed, 17 Dec 2025 09:47:04 +0000 (UTC) Authentication-Results: imf15.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=jh2KGANA; spf=pass (imf15.hostedemail.com: domain of qi.zheng@linux.dev designates 95.215.58.176 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=1765964824; 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=nqzAgJ4OlgcGBu7aVY4MnPgaTUGUmQkYyYjl0T7Jjfo=; b=u1UYm+A6Cfv3tSqra+o+dAHITSiQqWreZhHhiuDqrF6kiA7Ca/b/q/58HnBo0HNo6OY+h5 E1dfPspP2BioYTjC7lurI+k4AvH+Stt5hQkwBnunS707qJIC5n2qYwpodbgtO5P/vhByma KMhG7OutwX6gekrmtevd3Ea0yEbmRRw= ARC-Authentication-Results: i=1; imf15.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=jh2KGANA; spf=pass (imf15.hostedemail.com: domain of qi.zheng@linux.dev designates 95.215.58.176 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=1765964824; a=rsa-sha256; cv=none; b=0dLIL9tc8JurdS3/vL1agU8P1NcDP1bmfLLWovdd9f7DFdK+vov5ZLPBC7TnqOUhMpC3ul hpSdod3c7TrYyHsWfWiHgmSwYpYJmSAYT1bJltnmxrux88wXVs/wp0Kxzao3NxrqiiMeJc ohY5cC3PRsMB8qSeV2iAxD3EpBzi85A= 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=1765964822; 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=nqzAgJ4OlgcGBu7aVY4MnPgaTUGUmQkYyYjl0T7Jjfo=; b=jh2KGANAcZFZ/Soyhd/A84RQMbBaBHVyKCxUF5JCM+7cx9Rnhf/tMQ9P6HVN/+QKFGILZp BLjt6g/DwkO9AsGY0t54potwgCcFvvmS0tsSHhK+hfb0CuuOfNRuGIBOXhCfCHIj04JF9d IqY0V30iUlnAoa7IdoieTfgaHfQtGcM= 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 , Richard Henderson , Matt Turner Subject: [PATCH v3 2/7] alpha: mm: enable MMU_GATHER_RCU_TABLE_FREE Date: Wed, 17 Dec 2025 17:45:43 +0800 Message-ID: <3018b189364a57a76fc70dcb477aa5f0da045b05.1765963770.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: rspam02 X-Stat-Signature: 4gq96aorcey65d1ohbftuxng5n9dxc3p X-Rspam-User: X-Rspamd-Queue-Id: 72900A0006 X-HE-Tag: 1765964824-783857 X-HE-Meta: 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 NF2uLvTB N01U2sTlArYaXt8ts8h/rYyvwhFZX6KcAbp6H2cVqjsj+sfUo0QpahX/K+kQTZH8s22q6ROvQTTlb1w+JpJiRZoP3dwTJA76FQBuidXkTkDPz5dSYauc9vvHhaHXwNs9vXraXRI9vLYEX8i7KiddRsTHuZf6fMmyULHlEND8vs0nTq0OgKOmytdjZLRZyJ6xLmTa/pXXNRcWVIi/KQYN5krx3MpR3d6lkbHAztPKDatbUGT+QRDAZhz/KYbmwAbuBuvfFy6PO/ETfDvANUOC6+TS6ZPWDrmX4lj2VTZtqOKBr6lG2DA27Hv8ADBPRPMRGFG3D 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 | 6 +++--- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index 80367f2cf821c..6c7dbf0adad62 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -38,6 +38,7 @@ config ALPHA select OLD_SIGSUSPEND select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67 select MMU_GATHER_NO_RANGE + select MMU_GATHER_RCU_TABLE_FREE select SPARSEMEM_EXTREME if SPARSEMEM select ZONE_DMA help diff --git a/arch/alpha/include/asm/tlb.h b/arch/alpha/include/asm/tlb.h index 4f79e331af5ea..ad586b898fd6b 100644 --- a/arch/alpha/include/asm/tlb.h +++ b/arch/alpha/include/asm/tlb.h @@ -4,7 +4,7 @@ #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