Date: Mon, 25 Feb 2013 12:16:00 -0600 From: "Christopher D. Harrison" <harrison@biostat.wisc.edu> To: freebsd-net@FreeBSD.org Subject: igb network lockups Message-ID: <512BAA60.3060703@biostat.wisc.edu>
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I recently have been experiencing network "freezes" and network "lockups" on our Freebsd 9.1 systems which are running zfs and nfs file servers. I upgraded from 9.0 to 9.1 about 2 months ago and we have been having issues with almost bi-monthly. The issue manifests in the system becomes unresponsive to any/all nfs clients. The system is not resource bound as our I/O is low to disk and our network is usually in the 20mbit/40mbit range. We do notice a correlation between temporary i/o spikes and network freezes but not enough to send our system in to "lockup" mode for the next 5min. Currently we have 4 igb nics in 2 aggr's with 8 queue's per nic and our dev.igb reports: dev.igb.3.%desc: Intel(R) PRO/1000 Network Connection version - 2.3.4 I am almost certain the problem is with the ibg driver as a friend is also experiencing the same problem with the same intel igb nic. He has addressed the issue by restarting the network using netif on his systems. According to my friend, once the network interfaces get cleared, everything comes back and starts working as expected. I have noticed an issue with the igb driver and I was looking for thoughts on how to help address this problem. http://freebsd.1045724.n5.nabble.com/em-igb-if-transmit-drbr-and-ALTQ-td5760338.html Thoughts/Ideas are greatly appreciated!!! -C
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