Re: [dpdk-dev] [PATCH v2 00/13] introduce fail-safe PMD

[Ferruh Yigit <ferruh.yigit@intel.com>]

On 3/8/2017 3:15 PM, Gaetan Rivet wrote:
> This PMD intercepts and manages Ethernet device removal events issued by
> slave PMDs and re-initializes them transparently when brought back so that
> existing applications do not need to be modified to benefit from true
> hot-plugging support.
> 
> The stacked PMD approach shares many similarities with the bonding PMD but
> with a different purpose. While bonding provides the ability to group
> several links into a single logical device for enhanced throughput and
> supports fail-over at link level, this one manages the sudden disappearance
> of the underlying device; it guarantees applications face a valid device in
> working order at all times.
> 
> Each fail-safe instance is configured to run atop one or several
> devices, with one defined as the preferred device. Hot-plug events are
> handled on all of them, and Tx is always directed to the preferred device
> if present or to the next available failover device (Rx is always performed
> on all devices for simplicity).
> 
> Moreover, the configured slaves (preferred or failover) do not need to be
> present at initialization time and may appear later.
> 
> Slaves configuration is continuously synchronized with that of the virtual
> device, which exposes their common set of capabilities to the application.
> Failure to apply the current configuration state to a slave for any reason
> simply reschedules its initialization.
> 
> This series depends on the series
> [PATCH 0/4] clarify eth_dev state management
> [PATCH 0/5] add device removal event
> 
> v1 --> v2:
> 
>   - Wrote documentation
>   - Fixed commit logs, signed-off-by
>   - Added LSC event support
>   - A few minor fixes
> 
> Gaetan Rivet (13):
>   ethdev: save VLAN filter setting
>   ethdev: add flow API rule copy function
>   ethdev: add deferred intermediate device state
>   pci: expose device detach routine
>   pci: expose parse and probe routines
>   net/failsafe: add fail-safe PMD
>   net/failsafe: add plug-in support
>   net/failsafe: add flexible device definition
>   net/failsafe: support flow API
>   net/failsafe: support offload capabilities
>   net/failsafe: add fast burst functions
>   net/failsafe: support device removal
>   net/failsafe: support link status change event

Postponed to next release (17.08) based on tech board decision [1]

[1]
http://dpdk.org/ml/archives/dev/2017-March/061009.html