c19931ad4a
Runtime.Register() called driver.Get()/Put() in order to read back the basefs of the container. However, this is not needed, as the basefs is read during container.Mount() anyway, and basefs is only valid while mounted (and all current calls satisfy this). This seems minor, but this is actually problematic, as the Get/Put pair will create a spurious mount/unmount cycle that is not needed and slows things down. Additionally it will create a supurious devicemapper activate/deactivate cycle that causes races with udev as seen in https://github.com/dotcloud/docker/issues/4036. With this change devicemapper is now race-free, and container startup is slightly faster. Docker-DCO-1.1-Signed-off-by: Alexander Larsson <alexl@redhat.com> (github: alexlarsson) Upstream-commit: 0c71015dcf788c5342bb9422a447b7f9ad12d43d Component: engine