NetBSD Problem Report #54840

From gson@gson.org  Tue Jan  7 09:49:04 2020
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Date: Tue,  7 Jan 2020 11:48:59 +0200 (EET)
From: gson@gson.org (Andreas Gustafsson)
Reply-To: gson@gson.org (Andreas Gustafsson)
To: gnats-bugs@NetBSD.org
Subject: Some ATF test runs leave h_ps_strings2 process running
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>Number:         54840
>Category:       kern
>Synopsis:       Some ATF test runs leave h_ps_strings2 process running
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jan 07 09:50:00 +0000 2020
>Last-Modified:  Tue Jan 07 11:15:01 +0000 2020
>Originator:     Andreas Gustafsson
>Release:        NetBSD-current
>Organization:
>Environment:
System: NetBSD
Architecture: i386
Machine: i386
>Description:

Several recent ATF test runs on my i386 testbed have left a
h_ps_strings2 process running after the tests have completed.

The first occurrence was using sources from 2019.12.24.23.41.05,
and in 2020 it has happened in 5 runs out of 11 so far.

This is on real 8-core hardware.  I have not seen it happen in qemu.

The console log output from the first occurrence is here:

  http://www.gson.org/netbsd/bugs/build/i386-baremetal/2019/2019.12.24.23.41.05/test.log

Search for "arg0000" to find the process in case.

>How-To-Repeat:

>Fix:

>Audit-Trail:
From: Martin Husemann <martin@duskware.de>
To: gnats-bugs@netbsd.org
Cc: 
Subject: Re: kern/54840: Some ATF test runs leave h_ps_strings2 process
 running
Date: Tue, 7 Jan 2020 10:51:57 +0100

 Duplicate of 54819? [modulo the typo there]

 Martin

From: Andreas Gustafsson <gson@gson.org>
To: Martin Husemann <martin@duskware.de>
Cc: gnats-bugs@netbsd.org
Subject: Re: kern/54840: Some ATF test runs leave h_ps_strings2 process running
Date: Tue, 7 Jan 2020 12:42:22 +0200

 Martin Husemann wrote:
 >  Duplicate of 54819? [modulo the typo there]

 Probably related, yes.

 Strangely, I can't reproduce the problem by running just the
 t_ps_strings test program manually, even if I run it 1000 times
 in a row:

   # cd /usr/tests/kernel
   # seq 1000 | while read i && atf-run t_ps_strings; do true; done >log
   # ps -glaxw|grep h_
     0 11323  531    0  85  0  3776   388 pipe_rd O+   tty00 0:00.00 grep h_ 
   #

 This was run booted from the same disk image that showed a leftover
 h_ps_strings2 process after a full ATF run here:

   http://www.gson.org/netbsd/bugs/build/i386-baremetal/2020/2020.01.06.21.04.58/test.log

 -- 
 Andreas Gustafsson, gson@gson.org

From: Martin Husemann <martin@duskware.de>
To: Andreas Gustafsson <gson@gson.org>
Cc: gnats-bugs@netbsd.org
Subject: Re: kern/54840: Some ATF test runs leave h_ps_strings2 process
 running
Date: Tue, 7 Jan 2020 12:10:13 +0100

 It also does not happen every time for me (sounds like a race, and could
 also be a libpthread issue).

 Martin

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