From patchwork Mon Jan 7 07:01:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Wei W" X-Patchwork-Id: 10750075 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C9CE591E for ; Mon, 7 Jan 2019 07:36:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B75AA28567 for ; Mon, 7 Jan 2019 07:36:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id ABEBE2899B; Mon, 7 Jan 2019 07:36:33 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4C69F28567 for ; Mon, 7 Jan 2019 07:36:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726445AbfAGHgI (ORCPT ); Mon, 7 Jan 2019 02:36:08 -0500 Received: from mga01.intel.com ([192.55.52.88]:52919 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725306AbfAGHgI (ORCPT ); Mon, 7 Jan 2019 02:36:08 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 06 Jan 2019 23:36:08 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,450,1539673200"; d="scan'208";a="107800015" Received: from devel-ww.sh.intel.com ([10.239.48.119]) by orsmga008.jf.intel.com with ESMTP; 06 Jan 2019 23:36:05 -0800 From: Wei Wang To: virtio-dev@lists.oasis-open.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, kvm@vger.kernel.org, mst@redhat.com, cohuck@redhat.com Cc: borntraeger@de.ibm.com, pbonzini@redhat.com, dgilbert@redhat.com, wei.w.wang@intel.com, pasic@linux.ibm.com Subject: [PATCH v3 0/3] virtio-balloon: tweak config_changed Date: Mon, 7 Jan 2019 15:01:03 +0800 Message-Id: <1546844466-38079-1-git-send-email-wei.w.wang@intel.com> X-Mailer: git-send-email 2.7.4 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Since virtio-ccw doesn't work with accessing to the config space inside an interrupt context, this patch series avoids that issue by moving the config register accesses to the related workqueue contexts. v2->v3 ChangeLog: - rename cmd_id_received to cmd_id_received_cache, and have call sites read the latest value via virtio_balloon_cmd_id_received. (Still kept Cornelia and Halil's reviewed-by as it's a minor change) - remove zeroing vb->num_free_page_blocks in probe since vb is allocated via kzalloc. v1->v2 ChangeLog: - add config_read_bitmap to indicate to the workqueue callbacks about the necessity of reading the related config fields. Wei Wang (3): virtio-balloon: tweak config_changed implementation virtio-balloon: improve update_balloon_size_func virtio_balloon: remove the unnecessary 0-initialization drivers/virtio/virtio_balloon.c | 104 ++++++++++++++++++++++++++-------------- 1 file changed, 69 insertions(+), 35 deletions(-)