Re: Disconnection
Re: Disconnection
- Subject: Re: Disconnection
- From: Justin Walker <email@hidden>
- Date: Sun, 23 Nov 2003 15:59:27 -0800
On Sunday, November 23, 2003, at 03:33 PM, Jonathan Mckeown wrote:
matt parry wrote:
this seems to be a not uncommon problem.
you should be able to use "top" and then "kill -9" the
offending process. or you could use the activity
monitor and kill it from there.
I might be getting slightly off topic here, but does anyone ever have
a problem where they simply can't kill a process?
Yes. This is an issue in any OS. There are cases where a
process/task/app is in the middle of some "uninteruptable" operation,
and has to wait for the completion of some activity over which it has
no control (e.g., reading a block from a disk).
In this condition, it is not good to "kill" the process until things
are back to an interruptible state (otherwise, the system's bookkeeping
gets fouled up, and serious problems can result (e.g., a lost buffer,
in the above case).
Unix systems can deal with this by making the process in question
uninterruptible for the duration of the wait.
This can be detected with 'ps' (the 'man' page describes this, albeit
tersely).
I've had this happen on my dual G5 running Panther a few times now, it
doesn't seem to be any particular application, it just seems to happen
with one or two seemingly random processes sometimes. It doesn't
happen very often, but when it does I can't do a force quit and no
amount of sending kill -9 from the command line will end the process
(or processes) either, in fact I can't even restart the system (it
just hangs if I try). I have to manually power down :-(. It makes me
very thankful for the journalling filesystem.
Yup; since the process is uninterruptible, the system won't let you
interrupt it under any circumstances.
Regards,
Justin
--
Justin C. Walker, Curmudgeon-At-Large *
Institute for General Semantics | If you're not confused,
| You're not paying attention
*--------------------------------------*-------------------------------*
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