[nzlug] can not kill a process

[anru chen]

pid is same even use kill -9

anru

On 8/30/06, Michal Ludvig <michal at logix.cz> wrote:
> Rex Johnston wrote:
> > anru chen wrote:
> >
> >> i have a process that can not be killed even by use kill -9 pid.
> >
> > They are call zombies.  Stuck waiting for the kernel in a system call.
>
> Processes waiting in a system call are in state D - it's a normal state,
> e.g. for processes doing heavy I/O on the disk. Having too many
> processes in D state usually means your system is overloaded, disks are
> too slow or even there could be a problem with the disks (IO errors, etc).
>
> Zombies are in state Z - that means that they exited but their parent
> haven't yet checked their exit status. They don't take much system
> resources and are mostly harmless, but ideally you should have no
> zombies in the system indeed ;-) It's often an application bug.
>
> OTOH Anru described the process as being in state R. Strange he can't
> kill it with -9. Anru: when you kill -9 <PID> and relist processes is
> the PID of sendmail still the same? Or does it differ?
>
> Michal
>
> _______________________________________________
> NZLUG mailing list NZLUG at linux.net.nz
> http://www.linux.net.nz/cgi-bin/mailman/listinfo/nzlug
>