On Tue, Apr 23, 2013 at 9:06 AM, Ben Pfaff <b...@nicira.com> wrote:
> On Tue, Apr 23, 2013 at 08:37:40AM -0700, Gurucharan Shetty wrote: > > Currently, when we upgrade openvswitch packages, we do a restart > > of userspace daemons automatically. This does not replace the > > kernel module. > > > > But almost everytime, we want to use the new kernel module > > that comes with the new version. This means that we need to > > manually do a "force-reload-kmod". This step, reloads the > > kernel module and also restarts the userspace daemons. This gives > > us a total of two restarts of userspace daemons. This is quite > > expensive in a hypervisor with hundreds of VMs sending real traffic. > > This also hurts the controller as it gets two reconnections in a short > > amount of time. > > > > With this patch, during a package upgrade, if the kernel module > > on disk is different than the one that is loaded, we will > > automatically do a force-reload-kmod while openvswitch-switch > > is installed. If not, we will just do a "restart" like before. > > > > One can install the kernel package first and then install the userspace > > packages in 2 separate steps to enforce a single 'force-reload-kmod'. > > > > If anyone wants to just restart the userspace package instead of > > force-reload-kmod, they can set the value of OVS_FORCE_RELOAD_KMOD=no > > while installing the package. > > Ex: OVS_FORCE_RELOAD_KMOD=no dpkg -i openvswitch-switch* > > > > Signed-off-by: Gurucharan Shetty <gshe...@nicira.com> > > Looks good, thanks. > Thank you, Ben. I pushed this to master.
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