Re: [Linux-ia64] hanging process cannot be killed

David Mosberger
2001-05-16T18:49:36Z

>>>>> On Wed, 16 May 2001 18:55:20 +0200 (MEST), Erich Focht <focht@ess.nec.de> said:

Erich> Hello, how can it happen that a process isn't killable with
Erich> kill -9 any more?

Can happen easily if it's doing a non-interruptible sleep.

Erich> I have encountered this a few times and from within kdb two
Erich> processes seem to be in "run" state on the same CPU! The one
Erich> marked as "current" shows the following traceback:
Erich> __ia64_save_fpu+0x20 schedule+0xa40 invoke_schedule+0x20
Erich> ia64_leave_kernel+0x30

Erich> [snip...]

Erich> I've seen this with 2.4.0 and 2.4.4 kernels, with B1 stepping
Erich> CPUs. With 2.4.4 in single dispersal mode the problem doesn't
Erich> seem to occur...

I'd recommend to upgrade to B3 or C0. Earlier steppings had some
issues. Most of them can be worked around, but it's not very pretty
and I'd not recommend spending a lot of time on it.

--david