On Tue, 2010-08-31 at 09:36 -0500, Christoph Lameter wrote: > We got another instance yesterday. A large number of machines > simultaneously started spewing the kernel messages. Had to reboot to get > the state cleared up. Very very annoying. Anyone know a reason for these > writeback deadlocks? > Hi Christoph, >From what I could see in your original email to me, you appear to be using NFS over UDP on IPoIB on a 2.6.32-18 kernel. Is that still the case? If so, does anything change if you change to use TCP and/or an ordinary NIC? Your link to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/561210 appears to be the kswapd bug, which should be hacked around in later 2.6.32 stable versions. Cheers Trond -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
