> On May 13, 2019, at 3:43 AM, Michael van Elst <mlel...@serpens.de> wrote: > > br...@nmsu.edu (Brook Milligan) writes: > >> # ps -lp 4904 >> UID PID PPID CPU PRI NI VSZ RSS WCHAN STAT TTY TIME COMMAND >> 0 4904 1 1968 127 0 9924 1160 tstile D ? 0:00.00 disklabel sd0 > >> What exactly does the 'tstile' mean? > > It means, that the process is waiting for a mutex. There is no information on > what mutex it is waiting on, probably something related to a disk driver. > > You can use the 'crash' utility or the DDB kernel debugger to get a > backtrace. This shows where the process is waiting, which is a good > hint on what it is waiting for.
What is your suggestion for how to use 'crash'? I have never done that so I am not sure what commands are available once I run it. Running ps in crash does not seem to reveal much, but I'm not really sure how to interpret all the hex information. I am hesitant to drop into a kernel debugger, because the machine is 8000 miles away from me. >> What can be done (short of a power reset) to unwedge this machine? > > Probably nothing. This sounds like the only option is to get someone to power cycle it. Is that correct? It would still be nice to know what happened so I can understand what to do in the future; hence my questions about troubleshooting. Thanks for your help. Cheers, Brook
