From patchwork Wed Mar 12 00:06:57 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nico Pache X-Patchwork-Id: 14012759 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AFF5C1E86E for ; Wed, 12 Mar 2025 00:07:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741738077; cv=none; b=vB4rjsHkIxRXHA4tdzY+YHtsNSQCaObHtuNTXl5p0ojTyc+qdgvVUtxs/jVVGh0FzRzqXYKrVFiO/mmAnLMyEQhudGCLcBuQkob+DUArD+OgPO0SM+BBZ9OAwzQEF3V416Dn8n7FuznDyN0V+R2OW7q9P9MQZ/lnJEbYvBnqV1s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741738077; c=relaxed/simple; bh=14qdnQXr7GLQTPWGjRQDN0Vm1w/RNmHuEi4P4rqNoIs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=MQc3kejS3M44ZHknrp09bTqkR71/HBOkKS/HQjojx4NDybLBgWBs8FiPBYQFwdy4eS2Y8IOCKEjOE/KTNMdUejdE0X1CJX8td8Ct36yGcJ2r3UxVk1EmK+qB27BgdA7NY7Q0wf6g2+z4B37F9lZd48Gq2DJnpjyvGw/rUxDUwk0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=T7gYQVbG; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="T7gYQVbG" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1741738074; 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=3y2AIYNwaPbCVrw04Rp+BR5zhMHEUrAViSTJpQkqU9Q=; b=T7gYQVbG8BK0wIpkJf+ZQFFUqglrXjuYOj2olB3w05obmDX2AuJtXNHP06y7FRTICzGL08 Utm82+l/VIlsUj9gpgQqW3L9xKdQOClnv+vLFwAM5adnDRqJE4BJQ242w+kyIZ1frhTERG D/eck011LHYtrzTcTqH50qn2F/KNHs8= Received: from mx-prod-mc-05.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-620-xPY-jPQmOkWtvLqk-0dGRA-1; Tue, 11 Mar 2025 20:07:50 -0400 X-MC-Unique: xPY-jPQmOkWtvLqk-0dGRA-1 X-Mimecast-MFC-AGG-ID: xPY-jPQmOkWtvLqk-0dGRA_1741738067 Received: from mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.15]) (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-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 5C0691956080; Wed, 12 Mar 2025 00:07:46 +0000 (UTC) Received: from h1.redhat.com (unknown [10.22.88.56]) by mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 5DA631956094; Wed, 12 Mar 2025 00:07:38 +0000 (UTC) From: Nico Pache To: linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, xen-devel@lists.xenproject.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org Cc: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, jerrin.shaji-george@broadcom.com, bcm-kernel-feedback-list@broadcom.com, arnd@arndb.de, gregkh@linuxfoundation.org, mst@redhat.com, david@redhat.com, jasowang@redhat.com, xuanzhuo@linux.alibaba.com, eperezma@redhat.com, jgross@suse.com, sstabellini@kernel.org, oleksandr_tyshchenko@epam.com, akpm@linux-foundation.org, hannes@cmpxchg.org, mhocko@kernel.org, roman.gushchin@linux.dev, shakeel.butt@linux.dev, muchun.song@linux.dev, nphamcs@gmail.com, yosry.ahmed@linux.dev, kanchana.p.sridhar@intel.com, alexander.atanasov@virtuozzo.com Subject: [RFC 2/5] virtio_balloon: update the NR_BALLOON_PAGES state Date: Tue, 11 Mar 2025 18:06:57 -0600 Message-ID: <20250312000700.184573-3-npache@redhat.com> In-Reply-To: <20250312000700.184573-1-npache@redhat.com> References: <20250312000700.184573-1-npache@redhat.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.15 Update the NR_BALLOON_PAGES counter when pages are added to or removed from the virtio balloon. Signed-off-by: Nico Pache --- drivers/virtio/virtio_balloon.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 89da052f4f68..406414dbb477 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -274,6 +274,8 @@ static unsigned int fill_balloon(struct virtio_balloon *vb, size_t num) set_page_pfns(vb, vb->pfns + vb->num_pfns, page); vb->num_pages += VIRTIO_BALLOON_PAGES_PER_PAGE; + mod_node_page_state(page_pgdat(page), NR_BALLOON_PAGES, + VIRTIO_BALLOON_PAGES_PER_PAGE); if (!virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_DEFLATE_ON_OOM)) adjust_managed_page_count(page, -1); @@ -324,6 +326,8 @@ static unsigned int leak_balloon(struct virtio_balloon *vb, size_t num) set_page_pfns(vb, vb->pfns + vb->num_pfns, page); list_add(&page->lru, &pages); vb->num_pages -= VIRTIO_BALLOON_PAGES_PER_PAGE; + mod_node_page_state(page_pgdat(page), NR_BALLOON_PAGES, + -VIRTIO_BALLOON_PAGES_PER_PAGE); } num_freed_pages = vb->num_pfns;