On 12.07.2010, at 17:43, Adam McDougall wrote: > I also get MCE on x4100m2 when causing significant disk activity in mpt > while also downloading through em0 or em1.
Could you reproduce this on 6.x or 7.x? Because whatever we try here, we simply couldn't so far. A short test with Ubuntu also didn't show any sing of problems. > I was not able to trigger it > while using nfe, however nfe locked up on me during normal DNS server > traffic so that was a wash. We had issues with nfe pre-8.x, that's why we have been using the em nics, which seem to be part of the problem now in 8.x. > What seemed to work for me was to add an > Intel PCIE nic to the server and use it instead of the onboard NICS. Thanks for the hint. > For whatever reason I never experienced this problem until using ZFS. We were able to reproduce it with UFS on 8.x. with just one disks (no gmirror), but I guess it's easier to trigger with ZFS especially in an mirror setup. > I triggered it by downloading a 200m tgz file via http repeatedly > over gigabit and it would reliably crash within a minute or two. Our test case is basically: 1. fetch a large file using wget over em0 (100mbit link seems enough) 2. cp a large file locally to stress mpt 3. wait for MCE > I ordered a dozen nics for probably around $20 each and was satisfied > with this workaround given the age of the servers. I'm pinched on time > for work so I often don't get around to reporting issues where I've > found a workaround, I'm glad you can get that started. "Glad" we're not the only ones :-) Markus _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
