[Xen-devel] xenstored startup - race condition

[Bastian Blank <bastian@xxxxxxxxxxxx>]

Hi folks

The Debian packages carries a patch since some time which fixes a race
condition in the xenstore startup. Sometimes xenconsoled is not able to
connect the xenstore and just exits. A second try works, so xenstored
was just not yet ready.

Proposed fix:
- xend asks xenstored to also fork, this also reparents it to init.
- xenstored delays the exit of the parent until properly initialized and
  ready to accept connections.
- xend waits for exit of this process.

Implementation: Either fork, execv and waitpid or subprocess.

Bastian

-- 
Yes, it is written.  Good shall always destroy evil.
                -- Sirah the Yang, "The Omega Glory", stardate unknown

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel