Date: Mon, 12 Jul 2010 18:08:54 +0200 From: Markus Gebert <markus.gebert@hostpoint.ch> To: Adam McDougall <mcdouga9@egr.msu.edu> Cc: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: 8.1-RC2 - PCI fatal error or MCE triggered by USB/ehci on Sun X4100M2? Message-ID: <2CA1E184-D9FF-4093-A6D9-18AF6DDC7407@hostpoint.ch> In-Reply-To: <20100712154316.GD15784@egr.msu.edu> References: <6B57591F-9FA2-45EB-825F-1DB025C0635D@hostpoint.ch> <20100712154316.GD15784@egr.msu.edu>
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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.=20 "Glad" we're not the only ones :-) Markus
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