[dpdk-dev] [PATCH v4 00/12] introduce fail-safe PMD

Ferruh Yigit ferruh.yigit at intel.com
Mon May 29 16:03:40 CEST 2017

On 5/29/2017 2:42 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 patchset depends on:
> eal: complete attach / detach support
> http://dpdk.org/ml/archives/dev/2017-May/066366.html
> http://dpdk.org/dev/patchwork/patch/24522/
> ethdev: add flow API rule copy function
> http://dpdk.org/ml/archives/dev/2017-May/066145.html
> http://dpdk.org/dev/patchwork/patch/24406/
> ethdev: add isolated mode to flow API
> http://dpdk.org/ml/archives/dev/2017-April/064327.html
> http://dpdk.org/dev/patchwork/patch/23741/
> v1 --> v2:
>   - Wrote documentation
>   - Fixed commit logs, signed-off-by
>   - Added LSC event support
>   - A few minor fixes
> v2 --> v3:
>   - Numerous bug fixes.
>   - Complete sub-EAL rework to follow new bus API.
>   - burst protection on sub removal.
>   - more flexible sub definition.
>   - flow isolated mode support.
> v3 --> v4:
>   - Split back commits
>        net/failsafe: add fast burst functions
>        net/failsafe: support device removal
>     That were squashed by error during a rebase
>   - Fix segfault on port plugin
>   - Fix isolate mode support for MLX4 ports plugin
> Gaetan Rivet (12):
>   ethdev: save VLAN filter setting
>   ethdev: add deferred intermediate device state
>   ethdev: count devices consistently
>   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
>   net/failsafe: support flow API isolation mode

Bruce, Neil,

Any comment on to the latest version of the PMD?


Should this discussed in the tech-board, again for this release?


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