From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6B3893C457D for ; Tue, 21 Apr 2026 12:55:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776776109; cv=none; b=o61eLwQ7r6QZfoqPteph6vHzb0Vy4I2s3plIxD8kinCCbDpbTXBuc/zkWs7UIL7/OH7qn16Yz0uxQJrP1EZ342bD8sYYw2Xqki/JTKGeJZ+SeV5cOCuSjs1eZDHz0AMSQuH+a9RDm1PZ3YKL4dpYvbSjjoBWWS8wGUaNQQbyERY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776776109; c=relaxed/simple; bh=bq05xU3PL+CyBthJrCtQ/r4CGnYbkCvNdm1pwmKOzK4=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=WczJkWPGq3DCdML/q1DPpzKsLm/i7/K3F6hXUWyEaJwlcTHigB/RTxNfFtLUwmEXzGhzP/SuUW8bTERqAYJfWsSgP0wWCbrBOZijJniarqWHXcrRTMjLZF2Ug4UGRbr7ojxFuWDGDSAHCudUKajcBo2o6ASOxg4A1MH0Tkpg7oA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=A33+K5KU; arc=none smtp.client-ip=198.175.65.18 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="A33+K5KU" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1776776109; x=1808312109; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=bq05xU3PL+CyBthJrCtQ/r4CGnYbkCvNdm1pwmKOzK4=; b=A33+K5KUJLSpaqLtrQRJjHSPQG8P1vP/RrWo7KFtqokGW+elRiZnGbID pcE1gJljv4T2Dun/4dFnQNA30AbyOtUrAg6TtNdkBVC8P8HB8NTYbWUhJ klEGUfwlVse5DuRhWjyz6rmQKKr1c6p5TUMn980RTWMuR4qK8B5eD1Vg1 LgzjNFCYzWCde7X/sMzSos5DGXJRFXAt8eNVKMCWlzSJpun4KB54ZhQUP m69vmcazMKSiwoDPDPGhLnsHHw/obOM9olwpGflyv/Rw3mCIrg1RsF3j2 vjIM6qJM2aw9hiuFxIl9XtSHqvowvw4NHYeCdq6izoT8OqPK797M6d/cD Q==; X-CSE-ConnectionGUID: QJtOpD4ZR2yUT66EDXgRSw== X-CSE-MsgGUID: dghwGDdyST6Rw6Wljqar6g== X-IronPort-AV: E=McAfee;i="6800,10657,11762"; a="77721572" X-IronPort-AV: E=Sophos;i="6.23,191,1770624000"; d="scan'208";a="77721572" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by orvoesa110.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Apr 2026 05:55:05 -0700 X-CSE-ConnectionGUID: CFmvs+vuREqcNYoLHvmCzg== X-CSE-MsgGUID: uYv5bPufTKi7ctkH2oxBlQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,191,1770624000"; d="scan'208";a="229355498" Received: from spr10.sh.intel.com (HELO localhost) ([10.239.23.75]) by fmviesa008.fm.intel.com with ESMTP; 21 Apr 2026 05:55:01 -0700 From: Yuan Liu To: David Hildenbrand , Oscar Salvador , Mike Rapoport , Wei Yang Cc: linux-mm@kvack.org, Yong Hu , Nanhai Zou , Yuan Liu , Tim Chen , Qiuxu Zhuo , Yu C Chen , Pan Deng , Tianyou Li , Chen Zhang , linux-kernel@vger.kernel.org Subject: [PATCH v4 0/2] mm/memory hotplug/unplug: Optimize zone contiguous check when changing pfn range Date: Tue, 21 Apr 2026 08:55:06 -0400 Message-ID: <20260421125508.2317429-1-yuan1.liu@intel.com> X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This series cleans up the overlap memory map init check and optimizes zone contiguous check when changing pfn range. In addition to providing a significant improvement for VM hotplug (see the second patch for reference), it brings benefits for CXL hotplug as well. The link is as follows https://lore.kernel.org/all/20260409023552.GA2807@AE/ v3 link: https://lore.kernel.org/all/20260408031615.1831922-1-yuan1.liu@intel.com/ v4 changes: Add a new patch for clean up overlap memory map init check Yuan Liu (2): mm: move overlap memory map init check to memmap_init() mm/memory hotplug/unplug: Optimize zone contiguous check when changing pfn range Documentation/mm/physical_memory.rst | 13 +++++ drivers/base/memory.c | 6 ++ include/linux/mmzone.h | 47 ++++++++++++++++ mm/internal.h | 8 +-- mm/memory_hotplug.c | 12 +--- mm/mm_init.c | 82 +++++++++++----------------- 6 files changed, 100 insertions(+), 68 deletions(-) -- 2.47.3