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 AE7B5D2F004 for ; Tue, 27 Jan 2026 12:17:09 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 1E4966B0088; Tue, 27 Jan 2026 07:17:09 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 1A1A96B00A0; Tue, 27 Jan 2026 07:17:09 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 0CE7A6B00A2; Tue, 27 Jan 2026 07:17:09 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id ECE1B6B0088 for ; Tue, 27 Jan 2026 07:17:08 -0500 (EST) Received: from smtpin18.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id BED19160A8A for ; Tue, 27 Jan 2026 12:17:08 +0000 (UTC) X-FDA: 84377643336.18.2ADB47B Received: from out-188.mta1.migadu.com (out-188.mta1.migadu.com [95.215.58.188]) by imf15.hostedemail.com (Postfix) with ESMTP id 1C6E9A000F for ; Tue, 27 Jan 2026 12:17:06 +0000 (UTC) Authentication-Results: imf15.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=PPUTXLwM; spf=pass (imf15.hostedemail.com: domain of qi.zheng@linux.dev designates 95.215.58.188 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=1769516227; 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=9S/xSrdX3PQNdvGeiuAn8WfyMx/Wvh3tfYwOBKYci1k=; b=QVeazx8AtraXimR2SqHCdtYwsfS5So+WEnu0Q0S7+cb65qRG+tddbpsLSG6MLycIwAiCJe N+Ulng24uxK9iugUd1RY0d5u3tNaJSLO5L4ghpWfSgiHM0bLLhv7vg1ceRGJfAQ54xZkPc ZHXgC6VSYwXPWitxKHLg82BhnN8W6Jc= ARC-Authentication-Results: i=1; imf15.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=PPUTXLwM; spf=pass (imf15.hostedemail.com: domain of qi.zheng@linux.dev designates 95.215.58.188 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=1769516227; a=rsa-sha256; cv=none; b=EUwy8zpkz/yRIJdWkfnZWiZ6edk6YzC4Kk9iyaXUnMMOlv+3kkSpW5xiXnzEEWeaN/l4lL mSGsv7So27Y7cF1NKP8iHh7w4PYEvhDIWmXUSGjxojsnsmIc9+6TaAOgUkQiYmM5cN/N2k hReRA8aRjlguzDXif1jiXgSqB82UQOI= 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=1769516225; 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=9S/xSrdX3PQNdvGeiuAn8WfyMx/Wvh3tfYwOBKYci1k=; b=PPUTXLwMU1duEHyeudBnwMgqeL0QFNpFSjT+IpgiJrSgmVNwexEAjm3B23aqu5g9VcrKTg Aaw90cmNk5t7rMZujqg3RHg4NK585jt1GbWmBoHuCc2OwJwlcNbfr9XVJ72IPkS44CiySj 6Y7MLvU/JazKo2G7NgIk8Lrczju32XY= From: Qi Zheng To: david@kernel.org, andreas@gaisler.com, richard.weiyang@gmail.com, will@kernel.org, peterz@infradead.org, aneesh.kumar@kernel.org, npiggin@gmail.com, dev.jain@arm.com, ioworker0@gmail.com, linmag7@gmail.com, akpm@linux-foundation.org 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, sparclinux@vger.kernel.org, Qi Zheng Subject: [PATCH v4 8/8] mm: make PT_RECLAIM depends on MMU_GATHER_RCU_TABLE_FREE Date: Tue, 27 Jan 2026 20:13:01 +0800 Message-ID: <83b034810935a9ff18e425b085e065bb0acb28f3.1769515122.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: pk5opioro4q57ix185pod37o6uwanrcn X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 1C6E9A000F X-HE-Tag: 1769516226-998370 X-HE-Meta: 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 YjHBirYu BRrHFA9PVa5W5uasUNU0eDx4djQhjmxdCyjJltc8kRUpd50zNl85QRR1gM7l6cY/pk+4qrgjpsicP5hnuI9UDMz+Io5bApNPlzB+LDls7mr189kvPEwp52l9ZqdUVYArRGn8AT77VOuLcS6llDDI3fzWtQoR/yDr9rBSvNOgtfF9zvCCrV8xkkSsJ+x720dg4g1IGsVk/IY7TgiuIu9viESRxhFwowqdmvETdpJJI6NcZMZpSZPCqEmFBYoVM9ITKtWISP5tN4xfv8yyLMuIDMAa0Shen74e/+4xhoUZOvsm7Mz0ocfbo7FyjRUEnrl71FFtQU7sjTphR7G8= 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 The PT_RECLAIM can work on all architectures that support MMU_GATHER_RCU_TABLE_FREE, except for those that have selected HAVE_ARCH_TLB_REMOVE_TABLE,so make PT_RECLAIM depends on MMU_GATHER_RCU_TABLE_FREE && !HAVE_ARCH_TLB_REMOVE_TABLE. BTW, change PT_RECLAIM to be enabled by default, since nobody should want to turn it off. Signed-off-by: Qi Zheng Acked-by: David Hildenbrand (Red Hat) --- arch/x86/Kconfig | 1 - mm/Kconfig | 9 ++------- 2 files changed, 2 insertions(+), 8 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 80527299f859a..0d22da56a71b0 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -331,7 +331,6 @@ 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 456e9eaedca39..1f3109b164d86 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -1454,14 +1454,9 @@ config ARCH_HAS_USER_SHADOW_STACK config HAVE_ARCH_TLB_REMOVE_TABLE def_bool n -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 + def_bool y + depends on MMU_GATHER_RCU_TABLE_FREE && !HAVE_ARCH_TLB_REMOVE_TABLE help Try to reclaim empty user page table pages in paths other than munmap and exit_mmap path. -- 2.20.1