Dear Jason With a link_irq of 4, I still guess your problem is snd_buf filling up during a temporary link_loss (see: http://lists.freebsd.org/pipermail/freebsd-net/2011-November/030424.html).
I use a patched version of e1000 which addresses this issue and works good for me but it is based on 7.2.3 and I have just tested in on 7.3-RELEASE. If interested, I can send you the sources for test. You may also port my changes to 7.3.2 and roll your own version. On 3/8/2012 12:27 AM, Jason Wolfe wrote:
I'm sure it's getting old with all of the recent work put into the e1000 driver, but this is still ongoing with MSI-X enabled. Most machines are running an 8.2-STABLE from early Feb, though it appears there have been no relevant changes in RELENG_8 since then. I've disabled all possible em options on the devices also to rule that out and am still seeing the issue. I guess reverting back to MSI-X disabled is the next step if nothing is spotted. This box had been doing between 1 and 1.5Gb/s steady for the 26 days before the network hang.
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