From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756778Ab1I2P0X (ORCPT ); Thu, 29 Sep 2011 11:26:23 -0400 Received: from mx1.redhat.com ([209.132.183.28]:7199 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756470Ab1I2P0W (ORCPT ); Thu, 29 Sep 2011 11:26:22 -0400 From: Amit Shah To: Rusty Russell Cc: linux-kernel@vger.kernel.org, "Michael S. Tsirkin" , Amit Shah Subject: [PATCH 00/11] virtio: Support for hibernation (S4) Date: Thu, 29 Sep 2011 20:55:56 +0530 Message-Id: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, These patches add support for S4 to virtio (pci) and all drivers. The patches are based on the virtio-console patch series in Rusty's queue. For each driver, all vqs are removed before hibernation, and then re-created after restore. All the drivers in testing work fine: * virtio-blk is used for the only disk in the VM, IO works fine before and after. * virtio-console: port IO keeps working fine before and after. * If a port is waiting for data from the host (blocking read(2) call), this works fine in both the cases: host-side connection is available or unavailable after resume. In case the host-side connection isn't available, the blocking call is terminated. If it is available, the call continues to remain in blocked state till further data arrives. * virtio-net: ping remains active across S4. One packet is lost. (Current qemu.git has a regression in slirp code causing qemu segfault, commit 1ab74cea060 is the offender). * virtio-balloon: Works fine before and after. Forgets the ballooned value across S4. If it's desirable to maintain the ballooned value, a new config option can be created to do this. All in all, this looks pretty good. Please review and apply. Amit Shah (11): virtio: pci: switch to new PM API virtio-pci: add PM notification handlers for restore, freeze, thaw, poweroff virtio: console: Move out vq and vq buf removal into separate functions virtio: console: Add freeze and restore handlers to support S4 virtio: blk: Move out vq initialization to separate function virtio: blk: Add freeze, restore handlers to support S4 virtio: net: Move out vq initialization into separate function virtio: net: Move out vq and vq buf removal into separate function virtio: net: Add freeze, restore handlers to support S4 virtio: balloon: Move out vq initialization into separate function virtio: balloon: Add freeze, restore handlers to support S4 drivers/block/virtio_blk.c | 36 ++++++++++-- drivers/char/virtio_console.c | 124 ++++++++++++++++++++++++++++++--------- drivers/net/virtio_net.c | 98 ++++++++++++++++++++++--------- drivers/virtio/virtio_balloon.c | 65 +++++++++++++++------ drivers/virtio/virtio_pci.c | 57 +++++++++++++++++- include/linux/virtio.h | 4 + 6 files changed, 301 insertions(+), 83 deletions(-) -- 1.7.6.2