> -----Original Message----- > From: Mingjin Ye <mingjinx...@intel.com> > Sent: Thursday, October 19, 2023 5:04 PM > To: dev@dpdk.org > Cc: Yang, Qiming <qiming.y...@intel.com>; Zhou, YidingX > <yidingx.z...@intel.com>; Ye, MingjinX <mingjinx...@intel.com>; Su, Simei > <simei...@intel.com>; Wu, Wenjun1 <wenjun1...@intel.com>; Zhang, > Yuying <yuying.zh...@intel.com>; Xing, Beilei <beilei.x...@intel.com>; Wu, > Jingjing <jingjing...@intel.com> > 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 <mingjinx...@intel.com>
Acked-by: Qi Zhang <qi.z.zh...@intel.com> Applied to dpdk-next-net-intel after minor refine on commit log and description in ice.rst. Thanks Qi
