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swapon: Function not implemented

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Operating Systems Linux swapon: Function not implemented
# 1  
Old 02-22-2010
swapon: Function not implemented
Hi,

Trying to add a swap file to my server as below:

Code:
dd if=/dev/zero of=/swapfile1 bs=1M count=2048
2048+0 records in
2048+0 records out
2147483648 bytes (2.1 GB) copied, 27.4514 seconds, 78.2 MB/s
[root@clearab2 /]# mkswap -c /swapfile1
Setting up swapspace version 1, size = 2147479 kB
[root@clearab2 /]# swapon /swapfile1
swapon: /swapfile1: Function not implemented
[root@clearab2 /]# swapon -a
swapon: /swapfile1: Function not implemented

Does anyone know why this is happening i have googled but cant find anything?
# 2  
Old 02-22-2010
Could you post the output of
Code:
uname -a
zgrep 'CONFIG_SWAP' /proc/config.gz
cat /proc/swaps
swapon -V

# 3  
Old 02-22-2010
Hi,

Thanks for the quick reply, output below:

Code:
uname -a
Linux clearab2.miniserver.com 2.6.32.7-x1 #1 SMP Fri Feb 5 10:32:19 GMT 2010 i686 i686 i386 GNU/Linux
[root@clearab2 /]# zgrep 'CONFIG_SWAP' /proc/config.gz
gzip: /proc/config.gz: No such file or directory
[root@clearab2 /]# cat /proc/swaps
cat: /proc/swaps: No such file or directory
[root@clearab2 /]# swapon -V
swapon: (util-linux 2.13-pre7)

# 4  
Old 02-22-2010
What kind of machine are you on? Seems to me like the kernel used is optimized for some kind of embedded system, without support for a swap-space.
# 5  
Old 02-22-2010
its a webserver hosted by memset it should be a full install of centos 5.4 on a virtual platform.
# 6  
Old 02-22-2010
Ok, so it's probably a para-virtualized system or something similar. That means that you don't really have a system of your own, but share it with others. In order to avoid security problems most of these systems deny access to the /proc interface. In your case, it seems that this also prevents access to the interfaces governing swap space.

I'm afraid there's not much you can do other than asking your hoster for more swap space/memory.
# 7  
Old 02-22-2010
I have checked with them and they have disabled it as they say it will impact on disk I/O if every customer has a swap partition. Thanks for your help.
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