A patch series was firstly introduced about a year ago which resolves an issue with qemu-ga and virtio-serial functionality. The issue was discussed in the following thread: https://lists.gnu.org/archive/html/qemu-devel/2018-01/msg06256.html
In short, Sameeh sent an implementation which uses udev on Linux and device events API on Windows. Since udev API is only supported for kernels 2.6+ it is not a good approach and Michael suggested his alternative series which uses a loop and checks if the serial is present or not. Since the Windows API is supported and has backward compatibility up until Windows xp, there is no reason for not using the Windows API. It was finally agreed by Michael and Sameeh that a combination of both approaches should be used. This series does just that, it rebases Michael's patches on top of upstream and merges Sameeh's patches for Windows API into Michael's implementation. Michael's series: https://github.com/mdroth/qemu/commits/qga-retry-path Sameeh's series: https://lists.gnu.org/archive/html/qemu-devel/2017-08/msg02400.html https://lists.gnu.org/archive/html/qemu-devel/2017-08/msg02399.html https://lists.gnu.org/archive/html/qemu-devel/2017-08/msg02401.html Bishara AbuHattoum (1): qga-win: changing --retry-path option behavior Michael Roth (6): qga: group agent init/cleanup init separate routines qga: hang GAConfig/socket_activation off of GAState global qga: move w32 service handling out of run_agent() qga: add --retry-path option for re-initializing channel on failure qga-win: install service with --retry-path set by default qga-win: report specific error when failing to open channel qga/channel-win32.c | 3 +- qga/installer/qemu-ga.wxs | 2 +- qga/main.c | 302 +++++++++++++++++++++++++++++--------- qga/service-win32.h | 4 + 4 files changed, 243 insertions(+), 68 deletions(-) -- 2.17.0
