Re: Non-bootstrapping Go, COMPAT options

[Yasushi Oshima <oshima-ya%yagoto-urayama.jp@localhost>]

Thu, 11 Jan 2018 23:43:39 +0900 (JST)
I wrote:

> And more, in newer kernel(ex. 20180108 for netbsd-8),
> another problem appears,
> During to build go1.9.2, sometimes a kernel hangup occurs.
> I have not examined anything about this yet.

There is the ddb backtrace in this case by latest netbsd-8 kernel
from daily snapshot:
 http://nycdn.netbsd.org/pub/NetBSD-daily/netbsd-8/201801120300Z/evbarm-earmv6hf/binary/kernel/netbsd-RPI.bin.gz

ddb log when hangup from serial console:
 https://gist.github.com/oshimaya/00c3d5e17b7b17ce5e78bc2b46680bc9#file-armv6_go1-9-2_build_hangup_ddb-log

This shows go process wants to exit but anything block it,
sys_exit ->  exit1 -> exit_lwps -> lwp_wait -> cv_wait_sig -> sleepq_block...

This happen before building a bootstrap for go1.9.2,
So this 'go' process will be go1.4.

The thread handling of my Go1.4 port for NetBSD/earm may be
something wrong, but the hangup the kernel is important problem,
I think.
In my opinion, any userland process should not be able to
hangup whole system.

Thanks.
--
Yasushi Oshima