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3563c51d3e
The glibc setxid is supposed to be async signal safe, but libc developers confirm that it is not. This causes a problem when libvirt_lxc starts the FUSE thread and then runs clone() to start the container. If the clone() was done before the FUSE thread has completely started up, then the container will hang in setxid after clone(). The fix is to avoid creating any threads until after the container has been clone()'d. By avoiding any threads in the parent, the child is no longer required to run in an async signal safe context, and we thus avoid the glibc bug. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>