NetBSD Problem Report #46251
From martin@duskware.de Fri Mar 23 12:31:17 2012
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Date: Fri, 23 Mar 2012 12:31:17 +0000 (UTC)
From: martin@NetBSD.org
Reply-To: martin@NetBSD.org
To: gnats-bugs@gnats.NetBSD.org
Subject: processes hang on iowait
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>Number: 46251
>Category: port-vax
>Synopsis: processes hang on iowait
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: port-vax-maintainer
>State: closed
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Fri Mar 23 12:35:00 +0000 2012
>Closed-Date: Fri Apr 13 06:00:33 +0000 2018
>Last-Modified: Fri Apr 13 06:00:33 +0000 2018
>Originator: Martin Husemann
>Release: NetBSD 6.99.4
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD dead-to-the-world.duskware.de 6.99.4 NetBSD 6.99.4 (DEAD) #52: Thu Mar 22 23:15:11 CET 2012 martin@night-porter.duskware.de:/usr/src/sys/arch/vax/compile/DEAD vax
Architecture: vax
Machine: vax
>Description:
Probably fallout from the gcc 4.5.1 and/or -O2 changes:
login in on the console of a vax station 4000 most of the time does not make
it to a command prompt, or hangs on first command that produces serious
amounts of output.
Kernel messages still make it out, only the process on the console hangs.
Sending a siginfo via ctrl-t says for example:
load: 0.03 cmd: stty 334 [iowait] 0.00u 0.00s 0% 0k
and the ps output says:
323 tty03 I 0:00.00 -tcsh
331 tty03 Is 0:01.00 login
334 tty03 Z+ 0:00.00 (stty)
(why tty03?)
>How-To-Repeat:
s/a
>Fix:
n/a
>Release-Note:
>Audit-Trail:
From: Martin Husemann <martin@duskware.de>
To: gnats-bugs@NetBSD.org
Cc:
Subject: Re: port-vax/46251: processes hang on iowait
Date: Fri, 23 Mar 2012 13:36:44 +0100
This also happens with ssh connections, but far less often (probably because
they are faster and mostly win the race).
Martin
State-Changed-From-To: open->closed
State-Changed-By: martin@NetBSD.org
State-Changed-When: Fri, 13 Apr 2018 06:00:33 +0000
State-Changed-Why:
i am unable to reproduce this failure with newer kernels
- will re-open when I see it again.
>Unformatted:
(Contact us)
$NetBSD: query-full-pr,v 1.39 2013/11/01 18:47:49 spz Exp $
$NetBSD: gnats_config.sh,v 1.9 2014/08/02 14:16:04 spz Exp $
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