Re: bug help needed

[Thomas Klausner <tk%giga.or.at@localhost>]

Hi!

I'm seeing at least the first issue as well, see the thread "recurring
tstile hangs on -current" on current-users.

The second one has similar lines in the backtrace, but I didn't see
the concrete symptoms yet.
 Thomas

On Mon, Jun 03, 2019 at 09:26:18AM +0200, Frank Kardel wrote:
> 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
>