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Date:      Wed, 3 Aug 2005 16:57:15 -0300 (ADT)
From:      "Marc G. Fournier" <scrappy@hub.org>
To:        Robert Watson <rwatson@FreeBSD.org>
Cc:        freebsd-fs@freebsd.org, jeff@freebsd.org, freebsd-stable@freebsd.org
Subject:   Re: Consistent file system hang with RELENG_6 of today ...
Message-ID:  <20050803165145.L974@ganymede.hub.org>
In-Reply-To: <20050729092647.Q74149@fledge.watson.org>
References:  <20050728231728.E968@ganymede.hub.org> <20050729001252.N1194@ganymede.hub.org> <20050729092647.Q74149@fledge.watson.org>

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On Fri, 29 Jul 2005, Robert Watson wrote:

>
> On Fri, 29 Jul 2005, Marc G. Fournier wrote:
>
>> Now, as most of the "old timers" here know, my jail environment makes use 
>> of unionfs to "mount" a template layer, to share common binaries amongst 
>> the VMs ...
>> 
>> I have tried two different ways of doing this, both result in the exact 
>> same 'file system hang' ... and I have a core of each 'method' ...
>> 
>> The first was to use mount_devfs to, of course, mount the /dev directory 
>> within the jail itself ...
>> 
>> The second, I used the same /dev that existed within the jail, based on 
>> bulding a jail using a 4.x system ...
>> 
>> In both cases, the hang appears to be at the same spot, where 'sendmail' 
>> (in this case, the postfix port) starts up ...
>
> It would also be interesting to know: if you take unionfs out of the picture 
> (i.e., you use a regular file system for testing purposes), does the problem 
> go away?

Just checked this, and yes, the jail starts if unionfs is not involved ... 
the problem is in unionfs itself :(

And, there hasn't been any changes that I can see in unionfs since May 
3rd ... so it seems a fairly 'long standing' bug :(

----
Marc G. Fournier           Hub.Org Networking Services (http://www.hub.org)
Email: scrappy@hub.org           Yahoo!: yscrappy              ICQ: 7615664



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