Freebsd 11.4 crashing on ESX with PT Intel NIC

[Arif Khan]

Hi All,

The FreeBSD 11.4 vanilla VM downloaded from freebsd.org is crashing
when doing passthrough of Intel NIC
"Ethernet Controller X710 for 10GbE SFP+" after a couple of reboots.

In the ESXi kernel logs seeing this message
Code:
cpu10:2235436)IntrCookie: 1565: Unable to allocate 128 cookies: Out of resources
2021-02-24T13:32:47.831Z cpu10:2235436)PCIPassthru: 2461: Failed to
allocate 128 MSIX interrupts"
2021-02-24T13:32:47.968Z cpu10:2235436)UserDump: 2630:
vmx-vcpu-1:arif-debug-11: Dumping cartel 2235424 (from world 2235436)
to file /vmfs/volumes/5e329ba9-50e9cd52-8a4b-0cc47aacfdbc/arif-new-11/vmx-zdump.000
...
2021-02-24T13:32:48.771Z cpu1:2235436)UserDump: 2818:
vmx-vcpu-1:arif-debug-11: Userworld(vmx-vcpu-1:arif-debug-11) coredump
complete.
PCIPassthru: 2461: Failed to allocate 128 MSIX interrupts


The issue is not seen 12.0* freebsd VM. Looks like there are some
changes around MSIX allocation and deallocation in 12.0.

Can anyone point me to those changes so that I can backport.

regards,
Arif