[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-users] Random I/O deadlocks in multiple clouds
Greetings, I have two clouds, one running XCP 0.5 and another one running XCP 1.0. Since a few weeks i'm having problems on both of them: At one pseudo-random moment one or more of the domUs write this on the console: INFO: task [random program] blocked for more than 120 seconds. The log instead is filled with stacktraces: http://pastebin.com/ziyyWEXP >From then on, the VM becomes extremely lagged if not at all unreachable. The trace suggests it's an I/O problem, but the crashes don't seem to follow a pattern: they happen during high as well as low I/O traffic, high/low cpu load, high/low memory usage. The same thing happens on all dom0s of both my clouds. The domUs are all running PVOPS enabled kernels (2.6.32+), in a mix of vanilla+grsec, debian stock and debian backports (lenny/squeeze). I'm keeping the dom0s under monitoring, but nothing specific seems to happen during the domU crashes - nothing in xe host-dmesg, nothing in the graphs. At this point i'm quite lost, i have no idea how to further debug the issue. Does anyone have any suggestions? Thank you in advance Sincerely, -- Alessandro _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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