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 2B06ECE7AE8 for ; Fri, 14 Nov 2025 11:14:14 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 884248E0017; Fri, 14 Nov 2025 06:14:13 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 85B948E0002; Fri, 14 Nov 2025 06:14:13 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 798A48E0017; Fri, 14 Nov 2025 06:14:13 -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 663DE8E0002 for ; Fri, 14 Nov 2025 06:14:13 -0500 (EST) Received: from smtpin08.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 2190F58780 for ; Fri, 14 Nov 2025 11:14:13 +0000 (UTC) X-FDA: 84108953586.08.AA76689 Received: from out-174.mta0.migadu.com (out-174.mta0.migadu.com [91.218.175.174]) by imf28.hostedemail.com (Postfix) with ESMTP id 6B168C0012 for ; Fri, 14 Nov 2025 11:14:11 +0000 (UTC) Authentication-Results: imf28.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=B1fHws4v; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf28.hostedemail.com: domain of qi.zheng@linux.dev designates 91.218.175.174 as permitted sender) smtp.mailfrom=qi.zheng@linux.dev ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1763118851; a=rsa-sha256; cv=none; b=zfDG/gkp3vOprtecJqvq2X5F4agc9qq++yhGbNbpYrO2c+zCtCAC+qTANi+GRVIRiWesV3 FfsRCd7TdCZrQ07etF4NUab+mqEWF31j7QUvyldK5jiGby+DVTCay7XtBByRHisdDngqnU gykTjSwzWpcih8c4KSG3qlKeZ/97V5k= ARC-Authentication-Results: i=1; imf28.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=B1fHws4v; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf28.hostedemail.com: domain of qi.zheng@linux.dev designates 91.218.175.174 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=1763118851; 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=3MvAZBElD0X3pJk/MX8AXoxW4zTACm8dJmSYdSV26R0=; b=CXQfxrCsFkxML1+G8Pu5p5tIFLRp89rPHo6Ax1SbVa2S6bofaQ1wurG0cQfwZ1QTvyPXhi tiYaDhdLRykBSKPkHfEYGcLIZTiFpxzPAhRF4jvlZxRZnG2kEsQryHq5oVB71WNMSqR/3G u1n2jnBBom4oeu9UAdZz5EEfMMIWsuQ= 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=1763118849; 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=3MvAZBElD0X3pJk/MX8AXoxW4zTACm8dJmSYdSV26R0=; b=B1fHws4vdV9SHk7Nm4NMEkMGypQnWt5ebGnT0lkQhYxPSrPX9T5usjJtN8D6xLK5/tENRj 6lr6jCeTav9vHkLaX2Cm/MDvr39umGBs008BSWf4p0qasklCP7V5XJNNR/0A712o57bV/X UdgHrzzazzIM8MjWkX4twJlrGaTbo7c= 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 Subject: [PATCH 7/7] mm: make PT_RECLAIM depend on MMU_GATHER_RCU_TABLE_FREE && 64BIT Date: Fri, 14 Nov 2025 19:11:21 +0800 Message-ID: <0a4d1e6f0bf299cafd1fc624f965bd1ca542cea8.1763117269.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: 6B168C0012 X-Rspamd-Server: rspam07 X-Stat-Signature: e4a7c7c4jkbryaz1bpp6uaaf8pu74568 X-Rspam-User: X-HE-Tag: 1763118851-946192 X-HE-Meta: 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 3tY46h41 vtyF+paA+BSH+dO5BwrTkCC23esjTERMiKG6EiCNJYfLy6k9ste83xuvJH0OMXLEpsGjxXvhReu9AZgBp7oHhMFX8UOItYJ8hA2rPFKUl0hh8lcXq2OT/XEWo2i1azwEppun6pn9liZ31rIdKIXdL8uh7BqX/vmgpHMwsOF/WvwrQ7GV4RWEEh7EkDwd8bd4Thofgfvz6wrTcEtYhSU3RqkO1pAQ3cJVfFYKkp5nFTz7uSwA= 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 Make PT_RECLAIM depend on MMU_GATHER_RCU_TABLE_FREE so that PT_RECLAIM can be enabled by default on all architectures that support MMU_GATHER_RCU_TABLE_FREE. Considering that a large number of PTE page table pages (such as 100GB+) can only be caused on a 64-bit system, let PT_RECLAIM also depend on 64BIT. Signed-off-by: Qi Zheng --- arch/x86/Kconfig | 1 - mm/Kconfig | 6 +----- 2 files changed, 1 insertion(+), 6 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index eac2e86056902..96bff81fd4787 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -330,7 +330,6 @@ config X86 select FUNCTION_ALIGNMENT_4B imply IMA_SECURE_AND_OR_TRUSTED_BOOT if EFI select HAVE_DYNAMIC_FTRACE_NO_PATCHABLE - select ARCH_SUPPORTS_PT_RECLAIM if X86_64 select ARCH_SUPPORTS_SCHED_SMT if SMP select SCHED_SMT if SMP select ARCH_SUPPORTS_SCHED_CLUSTER if SMP diff --git a/mm/Kconfig b/mm/Kconfig index a5a90b169435d..e795fbd69e50c 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -1440,14 +1440,10 @@ config ARCH_HAS_USER_SHADOW_STACK The architecture has hardware support for userspace shadow call stacks (eg, x86 CET, arm64 GCS or RISC-V Zicfiss). -config ARCH_SUPPORTS_PT_RECLAIM - def_bool n - config PT_RECLAIM bool "reclaim empty user page table pages" default y - depends on ARCH_SUPPORTS_PT_RECLAIM && MMU && SMP - select MMU_GATHER_RCU_TABLE_FREE + depends on MMU_GATHER_RCU_TABLE_FREE && MMU && SMP && 64BIT help Try to reclaim empty user page table pages in paths other than munmap and exit_mmap path. -- 2.20.1