[Xen-bugs] [Bug 1746] Dom0 Locked up for 4 hours "BUG: soft lockup - CPU#3 stuck for 61s!"

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1746





------- Comment #1 from jfrias@xxxxxxxxx  2011-03-29 07:22 -------
This seems to be an issue with tapdisk2 and high i/o.

Here's a sample from top when the issue is happening:

Tasks: 228 total,   2 running, 226 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.4%us,  0.0%sy,  0.0%ni, 98.8%id,  0.0%wa,  0.0%hi,  0.0%si,  0.8%st
Mem:    771328k total,   747572k used,    23756k free,   139952k buffers
Swap:   524280k total,     5440k used,   518840k free,   342188k cached

 PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
15715 root      20   0  3796 2388 1868 S 9293.8  0.3 686893:40
tapdisk2
24367 root      20   0  4128 2720 1896 S 8004.8  0.4 553094:39
tapdisk2
3133 root      20   0  3928 2520 1868 S 5264.2  0.3 695773:20 tapdisk2
26586 root      20   0  4924 3516 1868 S 1370.3  0.5 450796:40 tapdisk2


The hardware profile is as follows ( no shared storage, just local storage )

Dell R710
72Gb Ram
2 x X5650  @ 2.67GHz ( 12 physical cores, 12 additional threads )
6 x 600GB 15K disks in raid 10
Dell H700 raid controller ( 512MB version )


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