bgpd: split soft reconfigure table task into several jobs to not block vtysh

BGP configuration changes that imply recomputing the BGP route table
(e.g. modifying route-maps, setting bgp graceful-shutdown) might be a
long time process depending on the size of the BGP table and the
route-map numbers and complexity. For example, setups with full
Internet routes take something like one minute to reprocess all the
prefixes when graceful-shutdown is configured. During this time, a
"show bgp commands" request on vtysh results in blocking the shell until
the soft reconfigure table task is over.

This patch splits bgp_soft_reconfig_table task into thread jobs of 25K
prefixes.

Some tests on a full Internet route setup show that after reconfiguring
route-maps or graceful-shutdown, vtysh is not stucked anymore. We are
now able to request commands like "show bgp summary" after 1 or 2
seconds instead of 30 to 60s.

Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>

0 files changed, 0 insertions, 0 deletions