bug help needed

[Frank Kardel <kardel%netbsd.org@localhost>]

Hi,

while moving to NetBSD-9 I'd like to point out some bugs that
may be relevant for NetBSD-8/-9. These bugs relate to
lockups/stalls and unexpected performance. If someone with
deeper locking- or uvm-wisdom could peek at these we might get
more stability,

Frank

Lockups -current:
    kern/54207 [serious/high]:
    <http://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=54207>
    -current locks up solidly when pkgsrc building 
adapta-gtk-theme-3.95.0.11

    <http://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=54207>
Responsible:    kern-bug-people
State:          open
Class:          sw-bug
Originator:     Frank Kardel
Release:        NetBSD 8.0_STABLE
Arrival-Date:   Thu May 16 14:40:00 +0000 2019


   kern/54210 [serious/high]:
   <http://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=54210>
   NetBSD-8 processes presumably not exiting
   <http://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=54210>


Responsible:    kern-bug-people
State:          open
Class:          sw-bug
Originator:     Frank Kardel
Release:        NetBSD 8.99.39
Arrival-Date:   Wed May 15 10:00:00 +0000 2019


mm driver/uvm interaction (-current):

   kern/54223 [serious/high]:
   <http://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=54223>
   kernel diagnostic assertion "umap->refcount != 0" failed: file
   "/src/NetBSD/cur/src/sys/uvm/uvm_bio.c", line 330 (/dev/kmem access)
   <http://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=54223>


Responsible:    kern-bug-people
State:          open
Class:          sw-bug
Originator:     Frank Kardel
Release:        NetBSD 8.99.41
Arrival-Date:   Wed May 22 20:15:00 +0000 2019


Performance anomaly:

   kern/54209 [serious/medium]:
   <http://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=54209>
   NetBSD 8 large memory performance extremely low
   <http://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=54209>

Responsible:    kern-bug-people
State:          open
Class:          sw-bug
Originator:     Frank Kardel
Release:        NetBSD 8.0_STABLE
Arrival-Date:   Thu May 16 14:40:00 +0000 2019