On Fri, 26 Dec 2008, Lin Jui-Nan Eric wrote: > Hi, > > Full back-trace is located here: > http://aqua.pixnet.tw/~jnlin/textdump/event3/1226/ Did you get anywhere with this? If not, and you are willing to recompile your kernel to include WITNESS, can you (in addition to the above output) get the output of "show alllocks" next time it happens? Gavin