On 9/15/2017 10:18 AM, Yang, Qiming wrote: >> -----Original Message----- >> From: Thomas Monjalon [mailto:[email protected]] >> Sent: Friday, September 15, 2017 4:43 PM >> To: Yang, Qiming <[email protected]> >> Cc: [email protected]; Tan, Jianfeng <[email protected]>; Thotton, Shijith >> <[email protected]>; Hu, Xuekun <[email protected]>; Yigit, >> Ferruh <[email protected]>; Patil, Harish <[email protected]>; >> Gregory Etelson <[email protected]>; [email protected] >> Subject: Re: [dpdk-dev] vf init issue with patch igb_uio: issue FLR during >> open >> and release of device file >> >> Hi >> >> 15/09/2017 10:04, Yang, Qiming: >>> Hi, Thomas >>> We meet a urgent issue because of Shijith's patch. >>> When use DPDK version 17.08, DPDK VF driver and kernel PF driver, i40e, >>> ixgbe >> and qede(Harish said) VF all meet initial failure. >> >> This patch has been integrated in DPDK 17.08-rc2 (2 months ago). >> Why a so obvious issue is discovered only now? >> >>> This issue only occurred when use 17.08 igb_uio, vfio-pci and 17.05 igb_uio >>> all >> works well. >>> Considering this issue will block our vf driver develop and test work, >>> could we >> revert this patch first and find another appropriate way? >> >> We need to be sure the revert is the right solution because it will be >> backported >> to the stable 17.08 release. >> >> Shijith suggests to "try removing pci_reset_function from igbuio_pci_open." >> Can we try this first? >> Are we sure the bug is not in new firmwares? > > I have tried to remove pci_reset_function, it works in my environment, but it > doesn't work in someone's enviroment. > And removing this function won't it changes the original purpose of his > patch? So I'm not sure it is a good solution.
Yes, removing that will be functionally almost same with revert. > This bug is not a firmware version related issue, we can reproduce stably > with older firmware. I also think this is not related to the firmware. But I don't see why works with one version of the Linux PF driver, but not other. > > Qiming >
