From patchwork Wed Dec 2 16:12:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitaly Kuznetsov X-Patchwork-Id: 11946371 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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,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 29C7DC64E7B for ; Wed, 2 Dec 2020 16:13:08 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 92E662173E for ; Wed, 2 Dec 2020 16:13:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 92E662173E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 167466B0068; Wed, 2 Dec 2020 11:13:07 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 117FD8D0003; Wed, 2 Dec 2020 11:13:07 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 031D08D0002; Wed, 2 Dec 2020 11:13:06 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0160.hostedemail.com [216.40.44.160]) by kanga.kvack.org (Postfix) with ESMTP id E20206B0068 for ; Wed, 2 Dec 2020 11:13:06 -0500 (EST) Received: from smtpin28.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id A8C70181AEF2A for ; Wed, 2 Dec 2020 16:13:06 +0000 (UTC) X-FDA: 77548836372.28.uncle39_430b3e2273b4 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin28.hostedemail.com (Postfix) with ESMTP id 5FD076D63 for ; Wed, 2 Dec 2020 16:13:06 +0000 (UTC) X-HE-Tag: uncle39_430b3e2273b4 X-Filterd-Recvd-Size: 3689 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) by imf28.hostedemail.com (Postfix) with ESMTP for ; Wed, 2 Dec 2020 16:13:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1606925585; 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=rZG0IaP7lxvBzgG5lqt7RoK3LK3aNw0DkDp+YEz1Y/0=; b=BddX60hiiMzh/NtFD6xYxZFgjTbCIzljWMjSpNFhFjDWF7cBfPCNBzjUk+Nzg31MXqk5z/ /w8TDmQVur0EKboKuL7ctCKCMIqiuFgpJkruupiL1xg0gJN5xhKxD6I4TgJ9mMi+0yV+Hv u4Frb/MtGnM2WnhSBY0Qm7DvjzhHW78= 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-105-eGdF3qlHNkCsp6VIUssoiQ-1; Wed, 02 Dec 2020 11:13:01 -0500 X-MC-Unique: eGdF3qlHNkCsp6VIUssoiQ-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id E9A0A1006C9E; Wed, 2 Dec 2020 16:12:59 +0000 (UTC) Received: from vitty.brq.redhat.com (unknown [10.40.192.18]) by smtp.corp.redhat.com (Postfix) with ESMTP id BED0F5C1BD; Wed, 2 Dec 2020 16:12:57 +0000 (UTC) From: Vitaly Kuznetsov To: linux-hyperv@vger.kernel.org Cc: Wei Liu , Stephen Hemminger , Haiyang Zhang , Michael Kelley , Dexuan Cui , David Hildenbrand , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 2/2] hv_balloon: do adjust_managed_page_count() when ballooning/un-ballooning Date: Wed, 2 Dec 2020 17:12:45 +0100 Message-Id: <20201202161245.2406143-3-vkuznets@redhat.com> In-Reply-To: <20201202161245.2406143-1-vkuznets@redhat.com> References: <20201202161245.2406143-1-vkuznets@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 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: Unlike virtio_balloon/virtio_mem/xen balloon drivers, Hyper-V balloon driver does not adjust managed pages count when ballooning/un-ballooning and this leads to incorrect stats being reported, e.g. unexpected 'free' output. Note, the calculation in post_status() seems to remain correct: ballooned out pages are never 'available' and we manually add dm->num_pages_ballooned to 'commited'. Suggested-by: David Hildenbrand Signed-off-by: Vitaly Kuznetsov Reviewed-by: David Hildenbrand --- drivers/hv/hv_balloon.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index da3b6bd2367c..8c471823a5af 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -1198,6 +1198,7 @@ static void free_balloon_pages(struct hv_dynmem_device *dm, __ClearPageOffline(pg); __free_page(pg); dm->num_pages_ballooned--; + adjust_managed_page_count(pg, 1); } } @@ -1238,8 +1239,10 @@ static unsigned int alloc_balloon_pages(struct hv_dynmem_device *dm, split_page(pg, get_order(alloc_unit << PAGE_SHIFT)); /* mark all pages offline */ - for (j = 0; j < alloc_unit; j++) + for (j = 0; j < alloc_unit; j++) { __SetPageOffline(pg + j); + adjust_managed_page_count(pg + j, -1); + } bl_resp->range_count++; bl_resp->range_array[i].finfo.start_page =