In this scenario, kernel PF + DPDK VF, when PF finds the link
state changes, up -> down or down -> up, it will send a
message to VF by mailbox. This link state change may be
triggered by PHY disconnection/reconnection, configuration
like *ifconfig down/up* or interface parameter, like MTU,
change.
> -Original Message-
> From: Lu, Wenzhuo
> Sent: Wednesday, June 01, 2016 9:53 AM
> To: dev at dpdk.org
> Cc: Wu, Jingjing; Lu, Wenzhuo
> Subject: [PATCH v2 2/2] igb: VF supports mailbox interruption for PF link
> up/down
>
> In this scenario, kernel PF + DPDK VF, when PF finds the link
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