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=-9.9 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,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 C7C3BC433E5 for ; Fri, 21 Aug 2020 10:35:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 98E2220738 for ; Fri, 21 Aug 2020 10:35:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="f4atkxJj" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727968AbgHUKfc (ORCPT ); Fri, 21 Aug 2020 06:35:32 -0400 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:26111 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728089AbgHUKfW (ORCPT ); Fri, 21 Aug 2020 06:35:22 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1598006121; 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=AeL7eQMcuzDtJ58y3twR8woldx1f2g3cujVSMwGjGgg=; b=f4atkxJjlh77DKACdy22VoaPcQ4vopSeQEfqAo5J39GRHCWAzLROVSfcT8RWbIR7mWwxSV XgVcYhG9gGdInbUWja9cYVT545jqAjeR2C7lUpEbK40+SZUdrvt/aV8hMoMTDPbxhsK+n5 49BUXBFodelVyqVOsqjgwmGd/7TEq/Y= 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-353-Fg8UITSqMl-wo432KovFmA-1; Fri, 21 Aug 2020 06:35:17 -0400 X-MC-Unique: Fg8UITSqMl-wo432KovFmA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 2DF0281F02D; Fri, 21 Aug 2020 10:35:15 +0000 (UTC) Received: from t480s.redhat.com (ovpn-114-87.ams2.redhat.com [10.36.114.87]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5684C60BF1; Fri, 21 Aug 2020 10:35:10 +0000 (UTC) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: virtualization@lists.linux-foundation.org, linux-mm@kvack.org, linux-hyperv@vger.kernel.org, xen-devel@lists.xenproject.org, David Hildenbrand , Andrew Morton , Michal Hocko , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Pankaj Gupta , Baoquan He , Wei Yang Subject: [PATCH v1 5/5] hv_balloon: try to merge system ram resources Date: Fri, 21 Aug 2020 12:34:31 +0200 Message-Id: <20200821103431.13481-6-david@redhat.com> In-Reply-To: <20200821103431.13481-1-david@redhat.com> References: <20200821103431.13481-1-david@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Sender: linux-hyperv-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org Let's use the new mechanism to merge system ram resources below the root. We are the only one hotplugging system ram, e.g., DIMMs don't apply, so this is safe to be used. Cc: Andrew Morton Cc: Michal Hocko Cc: "K. Y. Srinivasan" Cc: Haiyang Zhang Cc: Stephen Hemminger Cc: Wei Liu Cc: Pankaj Gupta Cc: Baoquan He Cc: Wei Yang Signed-off-by: David Hildenbrand --- drivers/hv/hv_balloon.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index 32e3bc0aa665a..49a6305f0fb73 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -745,6 +745,9 @@ static void hv_mem_hot_add(unsigned long start, unsigned long size, has->covered_end_pfn -= processed_pfn; spin_unlock_irqrestore(&dm_device.ha_lock, flags); break; + } else { + /* Try to reduce the number of system ram resources. */ + merge_system_ram_resources(&iomem_resource); } /* -- 2.26.2