[Bug 213257] Crash in IGB driver with ALTQ

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Wed Feb 22 19:23:51 UTC 2017


--- Comment #25 from freebsd at mcwest.org ---
I can confirm that setting hw.igb.num_queues=1 in /boot/loader.conf prevents
crashes when running a kernel compiled with IGB_LEGACY_TX.  I removed the queue
configuration from my internal igb(4) interface, and netperf's TCP stream test
hasn't been able to provoke a crash after ~30 min.

Assuming the system remains stable, this is a much simpler fix than adding a
new kernel config option.  Ken, if you have the time could you see if this
configuration change eliminates your system instability as well?

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