Re: [libvirt] [PATCH] Fix busy wait loop in LXC container I/O handling

From: "Daniel P. Berrange" <berrange(a)redhat.com&gt; If the host side of an LXC container console disconnected and the guest side continued to write data, until the PTY buffer filled up, the LXC controller would busy wait. It would repeatedly see POLLHUP from poll() and not disable the watch. This was due to some bogus logic detecting blocking conditions. Upon seeing a POLLHUP we must disable all reading & writing from the PTY, and setup the epoll to wake us up again when the connection comes back. Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com&gt; --- src/lxc/lxc_controller.c | 32 +++++++++++++++++--------------- 1 file changed, 17 insertions(+), 15 deletions(-)

- VIR_DEBUG("Container watch %d=%d host watch %d=%d", - console->contWatch, contEvents, - console->hostWatch, hostEvents); + VIR_DEBUG("Container watch=%d, events=%d closed=%d; host watch=%d events=%d closed=%d",