NetBSD Problem Report #46988

From martin@duskware.de  Thu Sep 20 11:05:19 2012
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Date: Thu, 20 Sep 2012 11:05:19 +0000 (UTC)
From: martin@NetBSD.org
Reply-To: martin@NetBSD.org
To: gnats-bugs@gnats.NetBSD.org
Subject: Zombies not exiting
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>Number:         46988
>Category:       kern
>Synopsis:       Zombies not exiting
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    pgoyette
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Sep 20 11:10:01 +0000 2012
>Closed-Date:    Wed Jan 20 05:20:15 +0000 2016
>Last-Modified:  Wed Jan 20 05:20:15 +0000 2016
>Originator:     Martin Husemann
>Release:        NetBSD 6.99.11
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD thirdstage.duskware.de 6.99.11 NetBSD 6.99.11 (MODULAR) #9: Thu Sep 20 11:12:29 CEST 2012 martin@night-porter.duskware.de:/usr/src/sys/arch/sparc64/compile/MODULAR sparc64
Architecture: sparc64
Machine: sparc64
>Description:

Running the /usr/tests/lib/libc/sys t_pipe2 test sometimes ends with
a non-exiting zombie process:

12310 ?      Z    0:00.00 (t_pipe2)

This is a new effect, but not always reliably reproducable - race condition
in recent lwp exit changes?


>How-To-Repeat:

cd /usr/tests/lib/libc/sys && atf-run t_pipe2 | atf-report
and watch it hanging sometimes.

>Fix:
no idea

>Release-Note:

>Audit-Trail:

Responsible-Changed-From-To: kern-bug-people->pgoyette
Responsible-Changed-By: pgoyette@NetBSD.org
Responsible-Changed-When: Sat, 28 Nov 2015 04:56:09 +0000
Responsible-Changed-Why:
I fixed a bunch of related bugs, probably managed to fix this one, too


State-Changed-From-To: open->feedback
State-Changed-By: pgoyette@NetBSD.org
State-Changed-When: Sat, 28 Nov 2015 04:56:09 +0000
State-Changed-Why:
Feedback sent to originator - need to confirm and close


From: Paul Goyette <paul@vps1.whooppee.com>
To: gnats-bugs@NetBSD.org
Cc: martin@netbsd.org
Subject: Re: kern/46988 - Zombies not exiting
Date: Sat, 28 Nov 2015 12:55:12 +0800 (PHT)

 I made a number of related commits in this area last month to resolve
 "the zombie that wouldn't die" problem that I had been seeing.  I can
 no longer reproduce my problem.

 Can you please check to see if your issue is also fixed?  It sounds like
 pretty much the same issue...

 Thanks!


 +------------------+--------------------------+-------------------------+
 | Paul Goyette     | PGP Key fingerprint:     | E-mail addresses:       |
 | (Retired)        | FA29 0E3B 35AF E8AE 6651 | paul at whooppee.com    |
 | Kernel Developer | 0786 F758 55DE 53BA 7731 | pgoyette at netbsd.org  |
 +------------------+--------------------------+-------------------------+

State-Changed-From-To: feedback->closed
State-Changed-By: pgoyette@NetBSD.org
State-Changed-When: Wed, 20 Jan 2016 05:20:15 +0000
State-Changed-Why:
As far as can be determined, this problem has been fixed.  If it recurs,
please feel free to re-open the PR.


>Unformatted:

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