> -----Original Message----- > From: Mingjin Ye <[email protected]> > Sent: Thursday, October 19, 2023 5:04 PM > To: [email protected] > Cc: Yang, Qiming <[email protected]>; Zhou, YidingX > <[email protected]>; Ye, MingjinX <[email protected]>; Su, Simei > <[email protected]>; Wu, Wenjun1 <[email protected]>; Zhang, > Yuying <[email protected]>; Xing, Beilei <[email protected]>; Wu, > Jingjing <[email protected]> > Subject: [PATCH v5] net/iavf: data paths support no-polling mode > > In a scenario involving a hot firmware upgrade, the network device on the > host side need to be reset, potentially causing the hardware queues to > become unreachable. In a VM, continuing to run VF PMD Rx/Tx during this > process can lead to application crash. > > The solution is to implement a 'no-polling' Rx and Tx wrapper. This wrapper > will check the link status and return immediately if the link is down. This is > especially important because the link down events will continue to be sent > from the PF to the VF during firmware hot upgrades, and the event will > always occur before the RESET IMPENDING event. > > The no-polling rx/tx mechanism will only be active when the devarg "no-poll- > on-link-down" is enabled. This devarg is typically recommended for use in > this specific hot upgrade scenario. > Ideally, "no-poll-on-link-down" should be used in conjunction with the > devarg "auto-reset" to provide a seamless and user-friendly experience > within the VM. > > Signed-off-by: Mingjin Ye <[email protected]>
Acked-by: Qi Zhang <[email protected]> Applied to dpdk-next-net-intel after minor refine on commit log and description in ice.rst. Thanks Qi
