Hi, > -----Original Message----- > From: Rongwei Liu <rongw...@nvidia.com> > Sent: Wednesday, February 15, 2023 2:04 PM > To: dev@dpdk.org; Matan Azrad <ma...@nvidia.com>; Slava Ovsiienko > <viachesl...@nvidia.com>; Ori Kam <or...@nvidia.com>; NBU-Contact- > Thomas Monjalon (EXTERNAL) <tho...@monjalon.net> > Cc: Raslan Darawsheh <rasl...@nvidia.com> > Subject: [PATCH v3] net/mlx5: support live migration > > When a DPDK application must be upgraded, the traffic downtime should be > shortened as much as possible. > During the migration time, the old application may stay alive while the new > application is starting and being configured. > > In order to optimize the switch to the new application, the old application > may need to be aware of the presence of the new application being > prepared. > This is achieved with a new API allowing the user to change the new > application state to standby and active later. > > The added function is trying to apply the new mode to all probed > mlx5 ports. To make this API simple and easy to use, the same flags have to > be accepted by all devices. > > This is the scenario of operations in the old and new applications: > . device: already configured by the old application > . new: start as active > . new: probe the same device > . new: set as standby > . new: configure the device > . device: has configurations from old and new applications > . old: clear its device configuration > . device: has only 1 configuration from new application > . new: set as active > . device: downtime for connecting all to the new application > . old: shutdown > > The active mode means network handling configurations are programmed to > the HW immediately, and no behavior changed. This is the default state. > The standby mode means configurations are queued in the HW. > If there is no application with active mode, any configuration is effective > immediately. > > Signed-off-by: Rongwei Liu <rongw...@nvidia.com> > Acked-by: Viacheslav Ovsiienko <viachesl...@nvidia.com>
Patch applied to next-net-mlx, Kindest regards, Raslan Darawsheh
