Re: [libvirt] [PATCH v5] Add functions for handling exponential backoff loops.

In a few places in libvirt we busy-wait for events, for example qemu creating a monitor socket. This is problematic because: - We need to choose a sufficiently small polling period so that libvirt doesn't add unnecessary delays. - We need to choose a sufficiently large polling period so that the effect of busy-waiting doesn't affect the system. The solution to this conflict is to use an exponential backoff. This patch adds two functions to hide the details, and modifies a few places where we currently busy-wait. --- src/fdstream.c | 10 +++--- src/libvirt_private.syms | 2 ++ src/qemu/qemu_agent.c | 9 +++--- src/qemu/qemu_monitor.c | 10 +++--- src/util/virtime.c | 81 ++++++++++++++++++++++++++++++++++++++++++++++++ src/util/virtime.h | 11 +++++++ 6 files changed, 111 insertions(+), 12 deletions(-)