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Date:      Sat, 24 Jan 2009 22:45:31 +0000
From:      Kris Kennaway <kris@FreeBSD.org>
To:        Tim Judd <tajudd@gmail.com>
Cc:        freebsd@sopwith.solgatos.com, freebsd-questions@freebsd.org
Subject:   Re: swap_pager complaints but not using swap
Message-ID:  <497B9A0B.50305@FreeBSD.org>
In-Reply-To: <497B87E7.6020601@gmail.com>
References:  <200901240556.FAA20764@sopwith.solgatos.com>	<497AEAAD.6020701@FreeBSD.org> <497B87E7.6020601@gmail.com>

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Tim Judd wrote:
> Kris Kennaway wrote:
>> Dieter wrote:
>>> AMD64  FreeBSD 7.0  2 GiB main memory
>>>
>>> My console says:
>>>
>>> login: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 22, 
>>> size: 4096
>>> swap_pager: indefinite wait buffer: bufobj: 0, blkno: 22, size: 4096
>>> swap_pager: indefinite wait buffer: bufobj: 0, blkno: 22, size: 4096
>>> swap_pager: indefinite wait buffer: bufobj: 0, blkno: 22, size: 4096
>>>
>>> pstat -sk
>>> Device          1K-blocks     Used    Avail Capacity
>>> /dev/ad6s10       4590208       96  4590112     0%
>>>
>>> Wow, using a whole 96K of swap.  I don't see any disk related
>>> complaints in dmesg.
>>>
>>> Is this something to worry about?
>>
>> Yes, the system was *trying* to do swap I/O and timing out while doing 
>> so.
>>
>> Kris
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> isn't swapspace supposed to be on a 'b' partition?  Are you using swap 
> on a slice 10?  how is that possible when the i386/amd64 BIOS can't see 
> more than 4 primary partitions?
> 
> Kris, would you mind giving input to this?  How can there be a s10, and 
> how can you add swapspace to a device that isn't a partition 'b' nor a 
> file backed swapspace?  Those were the only two ways I thought was 
> supported for swap.
> 
> Dieter, does my questions above sound to be a correct interpretation of 
> your disk setup?

swap can be put anywhere thesedays (post-FreeBSD 4.x), even on things 
that are not even simple disk devices.

Kris



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