kern/55304: lib/librumpclient/t_exec/threxec, rump/rumpkern/t_sp/reconnect now fail

[gson%gson.org@localhost (Andreas Gustafsson)]

>Number:         55304
>Category:       kern
>Synopsis:       lib/librumpclient/t_exec/threxec, rump/rumpkern/t_sp/reconnect now fail
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue May 26 14:30:00 +0000 2020
>Originator:     Andreas Gustafsson
>Release:        NetBSD-current, source date >= 2020.05.23.20.45.11
>Organization:
>Environment:
System: NetBSD
Architecture: x86_64
Machine: amd64
>Description:

The lib/librumpclient/t_exec/threxec and rump/rumpkern/t_sp/reconnect test cases
fail on real amd64 hardware since these commits:

  2020.05.23.20.45.10 ad src/sys/kern/kern_lwp.c 1.238
  2020.05.23.20.45.10 ad src/sys/kern/kern_proc.c 1.252
  2020.05.23.20.45.10 ad src/sys/kern/kern_turnstile.c 1.40
  2020.05.23.20.45.10 ad src/sys/kern/sys_lwp.c 1.81
  2020.05.23.20.45.11 ad src/sys/rump/librump/rumpkern/lwproc.c 1.49
  2020.05.23.20.45.11 ad src/sys/sys/lwp.h 1.210
  2020.05.23.20.45.11 ad src/sys/sys/proc.h 1.366
  2020.05.23.20.45.11 ad src/sys/sys/sleepq.h 1.31

Logs:

  http://www.gson.org/netbsd/bugs/build/amd64-baremetal/commits-2020.05.html#2020.05.23.20.45.11

>How-To-Repeat:

>Fix: