Re: Processes getting stuck in "fstchg" with NetBSD-10.99.12/amd64

Brian Buhrow <[email protected]> wrote:
> I have a number of machines running NetBSD-10.99.12/amd64 running on
> real hardware and running as VM machines, mostly xen, but also as
> guests on KVM.
> Out of approximately 25 different instances, I have one Xen machine
> where processes "hang".
> The machine may run for a week before this happens, or it may run for
> months.  To try and figure out what is going wrong, I installed a kernel
> with ddb in it and when the problem manifested itself, I discovered
> processes and threads that look like:

[snip]

> ... plus a ptyfs filesystem running in compatibility mode,
> i.e. /dev/ttypx, rather than /dev/pts/*, which means it doesn't show up
> as a filesystem at all.

How did you mount this ptyfs?

I thought that we either mount ptyfs under /dev/pts or use tratitional
ptys, I did not know that there was some "compatibility mode" inbetween.

Why not try this machine with a standard setup?