swap_pager complaints but not using swap
Kris Kennaway
kris at FreeBSD.org
Sat Jan 24 14:45:35 PST 2009
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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