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 X-Spam-Level: X-Spam-Status: No, score=-11.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 717C7C2B9F4 for ; Tue, 22 Jun 2021 05:48:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 50A426113D for ; Tue, 22 Jun 2021 05:48:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230094AbhFVFvG (ORCPT ); Tue, 22 Jun 2021 01:51:06 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:42244 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229677AbhFVFvF (ORCPT ); Tue, 22 Jun 2021 01:51:05 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1624340929; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=xxLPkIPUcsKXQ9diXtN8yoW1MRfwqf/tH+VKrSqwwVo=; b=CbJtkIpVJRuvbNXW3/WRKEQGeCUDbgZl4vb3D6V8mg7081qFwGxVLChYM91Aq2ot35Nw3S C6rsMDforI5He+gA9vhBViI2Vx5Gf5l14yRMnf0NRQE9DrBNMr6jAKZp4UQ1atWe2CPCX8 l4jsXA2rkML5HgmTT4IQlr6+TWyP1DQ= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-78-EmFo63mAMSiy1E8A1NaIAw-1; Tue, 22 Jun 2021 01:48:44 -0400 X-MC-Unique: EmFo63mAMSiy1E8A1NaIAw-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 393BD1005E4C; Tue, 22 Jun 2021 05:48:43 +0000 (UTC) Received: from gshan.redhat.com (vpn2-54-84.bne.redhat.com [10.64.54.84]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3FBD15D9DE; Tue, 22 Jun 2021 05:48:32 +0000 (UTC) From: Gavin Shan To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, alexander.duyck@gmail.com, david@redhat.com, mst@redhat.com, akpm@linux-foundation.org, anshuman.khandual@arm.com, catalin.marinas@arm.com, will@kernel.org, shan.gavin@gmail.com Subject: [PATCH v2 0/3] mm/page_reporting: Make page reporting work on arm64 with 64KB page size Date: Tue, 22 Jun 2021 15:49:23 +0800 Message-Id: <20210622074926.333223-1-gshan@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The page reporting threshold is currently equal to @pageblock_order, which is 13 and 512MB on arm64 with 64KB base page size selected. The page reporting won't be triggered if the freeing page can't come up with a free area like that huge. The condition is hard to be met, especially when the system memory becomes fragmented. This series intends to solve the issue by having page reporting threshold as 5 (2MB) on arm64 with 64KB base page size. The patches are organized as: PATCH[1/3] Fix some coding style in __page_reporting_request(). PATCH[2/3] Allows the device driver (e.g. virtio_balloon) to specify the page reporting order when the device info is registered. PATCH[3/3] Specifies the page reporting order to 5, corresponding to 2MB in size on ARM64 when 64KB base page size is used. Changelog ========= v2: * Rewrite the patches to let device driver specify the page reporting order. (Alex) Gavin Shan (3): mm/page_reporting: Fix code style in __page_reporting_request() mm/page_reporting: Allow driver to specify threshold virtio_balloon: Specify page reporting order if needed drivers/virtio/virtio_balloon.c | 17 +++++++++++++++++ include/linux/page_reporting.h | 3 +++ mm/page_reporting.c | 18 ++++++++++++------ mm/page_reporting.h | 10 ++-------- 4 files changed, 34 insertions(+), 14 deletions(-) -- 2.23.0