[dpdk-dev] [PATCH v2 2/2] i40evf: support interrupt based pf reset request

[Tao, Zhe]

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Jingjing Wu
> Sent: Wednesday, January 27, 2016 9:50 AM
> To: dev at dpdk.org
> Subject: [dpdk-dev] [PATCH v2 2/2] i40evf: support interrupt based pf reset
> request
> 
> Interrupt based request of PF reset from PF is supported by enabling the
> adminq event process in VF driver.
> Users can register a callback for this interrupt event to get informed, when a
> PF reset request detected like:
>   rte_eth_dev_callback_register(portid,
> 		RTE_ETH_EVENT_INTR_RESET,
> 		reset_event_callback,
> 		arg);
> 
> Signed-off-by: Jingjing Wu <jingjing.wu at intel.com>
Two questions,
1.If the VF RX/TX using msix 1 and Admin Queue using msix 0, 
how the two interrupts can both be read in user spaces, in VM VFIO not supported,

2.But if we want to  run l3fwd-power in VF, we can only assign the rx/tx intr to msix0,
but both thread will using epoll to wait the msix0 event, 
and intr thread may miss the vf reset event if l3fwd-power thread clean the msix0 related fd firstly
 if there are no more packets and msg response come in, the intr thread will not be wake up again