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 E2DC8CF2588 for ; Wed, 19 Nov 2025 07:33:41 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 5008A6B0012; Wed, 19 Nov 2025 02:33:41 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 4B1096B0022; Wed, 19 Nov 2025 02:33:41 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3EE096B00AA; Wed, 19 Nov 2025 02:33:41 -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 311F66B0012 for ; Wed, 19 Nov 2025 02:33:41 -0500 (EST) Received: from smtpin29.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id EF1F61603AD for ; Wed, 19 Nov 2025 07:33:40 +0000 (UTC) X-FDA: 84126541800.29.89F5F0B Received: from out-177.mta0.migadu.com (out-177.mta0.migadu.com [91.218.175.177]) by imf11.hostedemail.com (Postfix) with ESMTP id 3E23E40003 for ; Wed, 19 Nov 2025 07:33:39 +0000 (UTC) Authentication-Results: imf11.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=LUgmfphZ; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf11.hostedemail.com: domain of qi.zheng@linux.dev designates 91.218.175.177 as permitted sender) smtp.mailfrom=qi.zheng@linux.dev ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1763537619; a=rsa-sha256; cv=none; b=CQW0uJlHSgUE6kjjkRUq6JEe0X/XupSNxLj3VBDUHRgEashDR3/+XgHVOVKmZe/oXimQoj 8d2FUCArAkUqvf4cXY8MGjB84gPEAnhGGm+SkI2adpOlStDEilhGzZdwXadTNbDADZUPK7 gqv8OdfiHVDlAxU76kYk6kvXk6hf+do= ARC-Authentication-Results: i=1; imf11.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=LUgmfphZ; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf11.hostedemail.com: domain of qi.zheng@linux.dev designates 91.218.175.177 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=1763537619; 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=Z/QZPwfh2tBLiGMNDgv3nVc2+27U6V/3aKYz1C9WyO4=; b=K4395Il9yOB30m5g75UlZLpb2HfmrkLxtmXXW8zwRJtABRzm+jUw5Eul3obhbxm0uvigRo 8cug91vG7vtokt6L0V2so1z8nxWK4peGsjHTYh+yjZotiotTjqpetE9rSjfqwOeQJSA8W7 cd7DbS9apDpBoEpiUBs4e0t48/Yxz4w= 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=1763537617; 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=Z/QZPwfh2tBLiGMNDgv3nVc2+27U6V/3aKYz1C9WyO4=; b=LUgmfphZq+fvy8Fvu1tjVnrqGz9k2q8SBhj9h64+wRn+7bojNcXZyqdp6prQqscS2feFX8 bObNs5syxHC8+5XyV15RIhnayEGuvN50r1EUj1rPlsxFv7tOY7PB78KcZic/oWfkHREL8W JIpYE0IsfsnkMqTZu6kB6Akc6TgnRVo= 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 v2 7/7] mm: enable PT_RECLAIM on all 64-bit architectures Date: Wed, 19 Nov 2025 15:31:24 +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: rspam08 X-Rspamd-Queue-Id: 3E23E40003 X-Stat-Signature: tzg6mcd3j6grc9kbz4p6dsyezad4guna X-HE-Tag: 1763537619-974881 X-HE-Meta: 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 oidfbpNp nsOGR83KMiONZH3uSOJTGuL28P+I+LH/lVgsPn8qBHR2/EWnF+M5t0YztmcItx5JnAGFq417i1oJV9lzw8/hzrTw7/X/0oEliXjXlzs8bVfRrWVjEEyw+nt1oe6Y8P/PwcRdvU2dhYdqK5RoKe6kf2jQO66YjRMx5uSxxa41Nhzxng229S8CjFb6lEORIjbnEnVlWTNfrsF3LoC+D6sfCzl/E23h6e7trye8C7l6Cqd/+LQ0= 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 Now, the MMU_GATHER_RCU_TABLE_FREE is enabled on all 64-bit architectures, so make PT_RECLAIM depend on 64BIT, thereby enabling PT_RECLAIM on all 64-bit architectures. 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 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 d548976d0e0ad..94eec5c0cad96 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -1448,14 +1448,9 @@ 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 64BIT help Try to reclaim empty user page table pages in paths other than munmap and exit_mmap path. -- 2.20.1