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 7BE16D65529 for ; Wed, 17 Dec 2025 09:47:33 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E6AAD6B0098; Wed, 17 Dec 2025 04:47:32 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id E14CF6B0099; Wed, 17 Dec 2025 04:47:32 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D493E6B009B; Wed, 17 Dec 2025 04:47:32 -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 BFF2D6B0098 for ; Wed, 17 Dec 2025 04:47:32 -0500 (EST) Received: from smtpin03.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 929876094A for ; Wed, 17 Dec 2025 09:47:32 +0000 (UTC) X-FDA: 84228485544.03.36742FB Received: from out-181.mta1.migadu.com (out-181.mta1.migadu.com [95.215.58.181]) by imf28.hostedemail.com (Postfix) with ESMTP id CC2B2C000B for ; Wed, 17 Dec 2025 09:47:30 +0000 (UTC) Authentication-Results: imf28.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=Pyc1KpvA; spf=pass (imf28.hostedemail.com: domain of qi.zheng@linux.dev designates 95.215.58.181 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=1765964851; 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=6yDfSie6tI+R/bkHsg8f30F7brlmJ878+dqsdcToXoQ=; b=MzGpBx9THA9qmoec6Z30SRWM/3L8La9Y+QN0Xk6PZ6nuOVFVemWcC1oOa3hseoMuCeGyJK m8AUvFYjN9FNi3gnzyZbm7zqhIb4KHBFVdwSLVLaErwLJWRNRV6f/bPC2FhU0M2GT1h0dc 7VT64SxffT80i40EUA9v44tDWDU2EU8= ARC-Authentication-Results: i=1; imf28.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=Pyc1KpvA; spf=pass (imf28.hostedemail.com: domain of qi.zheng@linux.dev designates 95.215.58.181 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=1765964851; a=rsa-sha256; cv=none; b=1ksKKmvuQX0Roy0yQEP1e42j/r9TfgkID01LTXJpM62TSzEv0az9esWamF3HK2Ky0//d5A Qi5Ee5aroMFicuHRtCoVp39Seusd+Zw2uTHtNBkaLC/fVDAtRTnoYQBA7XNlfDIKO/pfB1 Fls14VBKst2J6CxQzAWu+MyJDaLsXwQ= 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=1765964849; 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=6yDfSie6tI+R/bkHsg8f30F7brlmJ878+dqsdcToXoQ=; b=Pyc1KpvAxk811HYK04xjZpyTzpEkJYxqqJmPoGGAQiXIyGUCHOz7UnqXrw4Idz7ei3/Hvn nKx4SWPSfqUG4f91J+BuNBSg1KCzxG0cBAC6q78EOJ3y5AH8vsj9RdwGKsDwh1k/3OGPBu +BEuL1tluj818rz3TGgaraPxgsFz7Rk= 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 Subject: [PATCH v3 7/7] mm: make PT_RECLAIM depends on MMU_GATHER_RCU_TABLE_FREE Date: Wed, 17 Dec 2025 17:45:48 +0800 Message-ID: In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: CC2B2C000B X-Stat-Signature: j4j6ucrseftwzq6igpt9whezmke3nhdm X-HE-Tag: 1765964850-409303 X-HE-Meta: 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 i9VLBtZ0 rHUEtELw0zCYIc8EwKLkjKsGclxVZfMXKl26QD/nAs3QBOlC6LmJRa1wyf6NuU65WejASEQjf3Jg+iPhVPomD8WG+h1EZatveohMwm5NqopokqdldnV1xzG/knoo7K6qk3h109upu/yiA0ImIZbTHLRR4Vaf3RZdY+2RP8Oiuqejs20mrw+aI8MNBILDX4U5UJxjPZersh4X6r+IQ4Cb6nwvM0eE1V/glqAdMtKWGYCdvzfo= 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, so make PT_RECLAIM depends on MMU_GATHER_RCU_TABLE_FREE. BTW, change PT_RECLAIM to be enabled by default, since nobody should want to turn it off. Signed-off-by: Qi Zheng --- 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 bd0ea5454af82..fc00b429b7129 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -1447,14 +1447,9 @@ 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 + def_bool y + depends on MMU_GATHER_RCU_TABLE_FREE help Try to reclaim empty user page table pages in paths other than munmap and exit_mmap path. -- 2.20.1