[dpdk-dev] [PATCH v11 05/19] eal: enable hotplug on multi-process

[Burakov, Anatoly]

On 11-Jul-18 4:09 AM, Qi Zhang wrote:
> We are going to introduce the solution to handle hotplug in
> multi-process, it includes the below scenario:
> 
> 1. Attach a device from the primary
> 2. Detach a device from the primary
> 3. Attach a device from a secondary
> 4. Detach a device from a secondary
> 
> In the primary-secondary process model, we assume devices are shared
> by default. that means attaches or detaches a device on any process
> will broadcast to all other processes through mp channel then device
> information will be synchronized on all processes.
> 
> Any failure during attaching/detaching process will cause inconsistent
> status between processes, so proper rollback action should be considered.
> 
> This patch covers the implementation of case 1,2.
> Case 3,4 will be implemented on a separate patch.
> 
> IPC scenario for Case 1, 2:
> 
> attach a device
> a) primary attach the new device if failed goto h).
> b) primary send attach sync request to all secondary.
> c) secondary receive request and attach the device and send a reply.
> d) primary check the reply if all success goes to i).
> e) primary send attach rollback sync request to all secondary.
> f) secondary receive the request and detach the device and send a reply.
> g) primary receive the reply and detach device as rollback action.
> h) attach fail
> i) attach success
> 
> detach a device
> a) primary send detach sync request to all secondary
> b) secondary detach the device and send reply
> c) primary check the reply if all success goes to f).
> d) primary send detach rollback sync request to all secondary.
> e) secondary receive the request and attach back device. goto g)
> f) primary detach the device if success goto g), else goto d)
> g) detach fail.
> h) detach success.
> 
> Signed-off-by: Qi Zhang <qi.z.zhang at intel.com>
> ---

Multiprocess part looks OK to me, so

Acked-by: Anatoly Burakov <anatoly.burakov at intel.com>

-- 
Thanks,
Anatoly