[Bug 265714] igc(4) drops link under high traffic

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D265714

--- Comment #59 from Tomasz "CeDeROM" CEDRO <[email protected]> ---
Playing around some more, here is a dedicated branch in case someone want to
test on top of existing 14.4-RELEASE-p8:

https://github.com/cederom/freebsd-src/tree/cederom-releng-14.4.8-igc_test_=
20260803

So far this is:

# git log --oneline -17
18774c90fb02 (HEAD -> cederom-releng-14.4.8-igc_test_20260803,
cederom/cederom-releng-14.4.8-igc_test_20260803) igc: Add VLAN hardware
filtering
c1bc2da741d5 igc: Correct hardware error statistics
e80624657a23 igc: Work around I225 v1 minimum IPG erratum
8429f0391c11 igc: Disable PCIe L1.2 on I225
ea774409c9ca igc: Apply ASPM L1.2 workaround to all I226 devices
df561a9ea5f9 igc: Disable ASPM L1.2 on I226 to prevent RX stalls
4472d239ff5b igc(4): document adaptive interrupt moderation
53408cbd10c1 igc: count TSO wire segments in the AIM counters
f94e9349b389 igc: use packet-size AIM
fe2c8e215ccf igc: synchronize interrupt moderation state
fdf2a8ad9699 igc: make AIM counter sampling coherent
dc0fd5a3b87b igc: fix RX accounting for multi-descriptor packets
d6f358d9412c igc.4: Describe better
a3a185dba982 igc: use newly exposed RSS hash key API rather than ad-hoc has=
hing
518828a76cef pci: Add L1 PM definitions
d9b8b38e449f rss: Enable portions of RSS globally to enable symmetric hashi=
ng
3de2d29b088e (tag: release/14.4.0-p8, origin/releng/14.4, cederom/releng/14=
.4)
Add UPDATING entries and bump version
a830cbd7bbef HEAD@{14}: cherry-pick: pci: Add L1 PM definitions

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