From patchwork Fri Mar 14 21:37:57 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nico Pache X-Patchwork-Id: 14017520 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1D5A5C28B2F for ; Fri, 14 Mar 2025 21:38:52 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.915469.1321019 (Exim 4.92) (envelope-from ) id 1ttCjr-0000WJ-U7; Fri, 14 Mar 2025 21:38:43 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 915469.1321019; Fri, 14 Mar 2025 21:38:43 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1ttCjr-0000WA-RP; Fri, 14 Mar 2025 21:38:43 +0000 Received: by outflank-mailman (input) for mailman id 915469; Fri, 14 Mar 2025 21:38:42 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1ttCjq-000827-GO for xen-devel@lists.xenproject.org; Fri, 14 Mar 2025 21:38:42 +0000 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id b24b6d7c-011c-11f0-9ab9-95dc52dad729; Fri, 14 Mar 2025 22:38:42 +0100 (CET) Received: from mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-171-4j3QuXoCNQOrm0DeJ5-F4Q-1; Fri, 14 Mar 2025 17:38:37 -0400 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 1B7E419560BB; Fri, 14 Mar 2025 21:38:34 +0000 (UTC) Received: from h1.redhat.com (unknown [10.22.80.88]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id A74201944E42; Fri, 14 Mar 2025 21:38:28 +0000 (UTC) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: b24b6d7c-011c-11f0-9ab9-95dc52dad729 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1741988320; 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=dGPxM9RdXtkX+Els8nvXOJm60GkYwZd/fztNUeVaxvI=; b=N1KiB4sC3veL8yihY/K7w70PEUapQvZnYNJOxn00MX4IkqAvvXInzqGpxiFnRN3lT4JJW6 IP+fjhE1uNnCkPswfRlQ76q4V50CCDYc1X9QcBQMsxpYb1Ambma43PLZhuFuyvs1qqXvAI SvcAwlSOU9u/3aCDEZS5GAbTZBLmY+g= X-MC-Unique: 4j3QuXoCNQOrm0DeJ5-F4Q-1 X-Mimecast-MFC-AGG-ID: 4j3QuXoCNQOrm0DeJ5-F4Q_1741988314 From: Nico Pache To: linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, virtualization@lists.linux.dev Cc: alexander.atanasov@virtuozzo.com, muchun.song@linux.dev, roman.gushchin@linux.dev, mhocko@kernel.org, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, jgross@suse.com, sstabellini@kernel.org, oleksandr_tyshchenko@epam.com, akpm@linux-foundation.org, mst@redhat.com, david@redhat.com, yosry.ahmed@linux.dev, hannes@cmpxchg.org, nphamcs@gmail.com, chengming.zhou@linux.dev, kanchana.p.sridhar@intel.com, llong@redhat.com, shakeel.butt@linux.dev Subject: [PATCH v2 4/4] xen: balloon: update the NR_BALLOON_PAGES state Date: Fri, 14 Mar 2025 15:37:57 -0600 Message-ID: <20250314213757.244258-5-npache@redhat.com> In-Reply-To: <20250314213757.244258-1-npache@redhat.com> References: <20250314213757.244258-1-npache@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Update the NR_BALLOON_PAGES counter when pages are added to or removed from the Xen balloon. Signed-off-by: Nico Pache --- drivers/xen/balloon.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index 163f7f1d70f1..65d4e7fa1eb8 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -157,6 +157,8 @@ static void balloon_append(struct page *page) list_add(&page->lru, &ballooned_pages); balloon_stats.balloon_low++; } + inc_node_page_state(page, NR_BALLOON_PAGES); + wake_up(&balloon_wq); } @@ -179,6 +181,8 @@ static struct page *balloon_retrieve(bool require_lowmem) balloon_stats.balloon_low--; __ClearPageOffline(page); + dec_node_page_state(page, NR_BALLOON_PAGES); + return page; }