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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 A034DC2D0C0 for ; Fri, 20 Dec 2019 14:38:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6C97924684 for ; Fri, 20 Dec 2019 14:38:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576852698; bh=adaLURxApglgsLOtk86MPjGKplHMQiooho1DTqM7f8M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=HUJJBkv6kqqhcUfRMXua9PIl49ydem6icxno4R0yfPUuSb4g4J2WXErNCYGuR3myJ dmp+ncwX1FFuxVxsK7BGCbZfPhfVik745D+AriVbiTtm+6ecZRVPIxZcyq4WRq4OF6 pXjJY0kF8HjIp1I9CYnXdBetfxZxqkR2I0U7dtUk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728103AbfLTOiF (ORCPT ); Fri, 20 Dec 2019 09:38:05 -0500 Received: from mail.kernel.org ([198.145.29.99]:42248 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728400AbfLTOiE (ORCPT ); Fri, 20 Dec 2019 09:38:04 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8D31424687; Fri, 20 Dec 2019 14:38:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576852684; bh=adaLURxApglgsLOtk86MPjGKplHMQiooho1DTqM7f8M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=yJWcNXqm9lZP5BRS7I5XTzSEQpzH2u+biDhkH6H20/uJIv6YaCusPk3LcWkzp4Rlk L3vIhtZfNrMbHATNGY1FZO/xom1bEHqQlHyiS0WPgxHh9fVLXs/uLCbBAcsStJKHZ3 hXSdGpZ8SfEgUPoDLv1stefHc3PH5/fRDGc/fTvg= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Juergen Gross , Nicholas Tsirakis , Boris Ostrovsky , Sasha Levin , xen-devel@lists.xenproject.org Subject: [PATCH AUTOSEL 4.14 18/19] xen/balloon: fix ballooned page accounting without hotplug enabled Date: Fri, 20 Dec 2019 09:37:39 -0500 Message-Id: <20191220143741.10220-18-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191220143741.10220-1-sashal@kernel.org> References: <20191220143741.10220-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Juergen Gross [ Upstream commit c673ec61ade89bf2f417960f986bc25671762efb ] When CONFIG_XEN_BALLOON_MEMORY_HOTPLUG is not defined reserve_additional_memory() will set balloon_stats.target_pages to a wrong value in case there are still some ballooned pages allocated via alloc_xenballooned_pages(). This will result in balloon_process() no longer be triggered when ballooned pages are freed in batches. Reported-by: Nicholas Tsirakis Signed-off-by: Juergen Gross Reviewed-by: Boris Ostrovsky Signed-off-by: Juergen Gross Signed-off-by: Sasha Levin --- drivers/xen/balloon.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index 71a6deeb4e714..3f9260af701f0 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -401,7 +401,8 @@ static struct notifier_block xen_memory_nb = { #else static enum bp_state reserve_additional_memory(void) { - balloon_stats.target_pages = balloon_stats.current_pages; + balloon_stats.target_pages = balloon_stats.current_pages + + balloon_stats.target_unpopulated; return BP_ECANCELED; } #endif /* CONFIG_XEN_BALLOON_MEMORY_HOTPLUG */ -- 2.20.1