Re: [libvirt] [PATCH] xen-xs: fix uuid of renamed domain

When the XenStore tdb lives persistently and is not cleared between host reboots, Xend (version 3.4 and 4.1) re-creates the domain information located in XenStore below /vm/$UUID. (According to the xen-3.2-commit hg265950e3df69 to fix a problem when locally migrating a domain to the host itself.) When doing so a version number is added to the UUID separated by one dash, which confuses xenStoreDomainIntroduced(): It iterates over all domains and tries to lookup all inactive domains using xenStoreDomainGetUUID(), which fails if the running domain is renamed: virUUIDParse() fails to parse the versioned UUID and the domain is flagged as missing. When this happens the function delays .2s and re-tries 20 times again, multiplied by the number of renamed VMs. 14:48:38.878: 4285: debug : xenStoreDomainIntroduced:1354 : Some domains were missing, trying again

The patch adds truncation of the UUID as read from the XenStore path before passing it to virUUIDParse(). The same issue is reported at <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=666135> Signed-off-by: Philipp Hahn <hahn(a)univention.de&gt; --- src/xen/xs_internal.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-)