[Systems] Bender + kvm + git.sugarlabs.org = slow

[Daniel Narvaez]

Hey,

the buildbot is slower than it used to be because cloning
git.sugarlabs.org repositories takes a while. I noticed it just blocks
for several seconds before pulling any data. By stracing git I can see
that it blocks in

connect(3, {sa_family=AF_INET6, sin6_port=htons(9418),
inet_pton(AF_INET6, "2002:1255:2c78::1", &sin6_addr), sin6_flowinfo=0,
sin6_scope_id=0}, 28

This is inside the build slaves, which are kvm virtual machines on
bender. And apparently it happens only on git.sugarlabs.org, pulling
from git.gnome.org is fast. Also git.sugarlabs.org is fast from bender
itself, outside the vm.

Any idea what could be going on?

-- 
Daniel Narvaez