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Date:      Mon, 26 Jun 2006 13:12:53 -0300 (ADT)
From:      "Marc G. Fournier" <scrappy@hub.org>
To:        Kostik Belousov <kostikbel@gmail.com>
Cc:        freebsd-stable@freebsd.org, Dmitry Morozovsky <marck@rinet.ru>
Subject:   Re: vmstat 'b' (disk busy?) field keeps climbing ...
Message-ID:  <20060626131139.I1114@ganymede.hub.org>
In-Reply-To: <20060626143038.GK79678@deviant.kiev.zoral.com.ua>
References:  <20060624221556.O30039@woozle.rinet.ru> <20060624152525.D1114@ganymede.hub.org> <20060625164752.H52500@woozle.rinet.ru> <20060625105843.O1114@ganymede.hub.org> <20060625211510.D52500@woozle.rinet.ru> <20060625154247.N1114@ganymede.hub.org> <20060626014210.P1114@ganymede.hub.org> <20060626014601.E1114@ganymede.hub.org> <20060626045547.GI79678@deviant.kiev.zoral.com.ua> <20060626021616.W1114@ganymede.hub.org> <20060626143038.GK79678@deviant.kiev.zoral.com.ua>

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On Mon, 26 Jun 2006, Kostik Belousov wrote:

> On Mon, Jun 26, 2006 at 02:20:12AM -0300, Marc G. Fournier wrote:
>> On Mon, 26 Jun 2006, Kostik Belousov wrote:
>>
>>> Yes, this looks like a deadlock. As I understand, that's on 6.1-STABLE ?
>>
>> Yes, kernel sources, it seems, from May 25th, according to my /usr/src
>> tree ...
>>
>>> BTW, do you use snapshots ?
>>
>> Not that I've explicitly enabled ...
>>
>>> I think that without ddb access, diagnose and debug the problem would be
>>> quite hard.
>>
>> Would it be a simple matter of:
>>
>> CTL-ALT-ESC
>> panic
>>
>> to get it to dump core?  Or would more be involved?  Would a core dump
>> even work?
> Core dumps are somewhat unconvenient in this situation. Better,
> sending report to me, follow my advise in

> http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug-deadlocks.html

The problem is that I'm dealing with a remote server here, no serial 
console, and no guaranteed keyboard :(  I'm between a rock and a hard 
place on this one :(

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



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