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Message-ID: <4C793DD5.6020300@langille.org>
Date: Sat, 28 Aug 2010 12:48:21 -0400
From: Dan Langille <dan@langille.org>
Organization: The FreeBSD Diary
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To: Attilio Rao <attilio@freebsd.org>
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Cc: freebsd-scsi@freebsd.org
Subject: Re: camcontrol rescan all - locks system
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On 8/28/2010 12:14 PM, Dan Langille wrote:
> On 8/28/2010 12:07 PM, Attilio Rao wrote:
>> Can you use procstat on the camcontrol?
>
> The system is completely unresponsive.
>
>> Is this problem easilly reproducible for you?
>
> I believe so. I have seen this behavior before, on another system.
>
> FYI, I went to the console to reboot. CTL-ALT-DEL had no [immediate]
> effect. Then I hit the power button. Then these messages started
> appearing every 20 seconds on the console:
>
> swap_pager: indefinite wait buffer: bufobj: 0, blkno: 928, size 4096
>
> Screen shot here:
>
> http://www.flickr.com/photos/20922021@N04/4934586561/
>
> I will probably power cycle the system to get it back. Given that the
> system goes unresponsive if I do an camcontrol, what debugging can I
> provide?

Since my last post, I'm seeing new console message:

Approaching the limit on PV entries, consider increasing either the 
vm.pmap.shpgperproc or the vm.pmap.pv_entry_max sysctl.

Screenshot:

   http://www.flickr.com/photos/20922021@N04/4934683561/

-- 
Dan Langille - http://langille.org/