weird 'swapon -a' error

elluva · 08-17-2004, 11:20 AM

On my fresh slackware 10 install, all went well. Then I compiled kernel 2.6.7 and then the trouble started. My machine started to work extremely slow when I opened up to many programs and I soon found out that my swap partition wasn't used. I checked /etc/fstab and noticed that the line concerning swap space was gone

.
I added it again and all worked. Now I recompiled my kernel with the same config file, but with some extra modules and have an even stranger problem. /etc/fstab isn't changed, but swapon -a won't activate my swap partition.

this is the error:

Code:

swapon: /dev/hda5: Invalid argument

And this is my line for swap in /etc/fstab:

Code:

/dev/hda5        swap             swap        defaults         0   0

tnx,
elluva

ve2mrj · 08-17-2004, 11:45 AM

When you change kernel from 2.4 to 2.6 you must
reformat the swap:
mkswap /dev/hda5
swapon /dev/hda5

That's all

Richard

SBing · 08-17-2004, 11:54 AM

Quote:

Originally posted by ve2mrj
When you change kernel from 2.4 to 2.6 you must reformat the swap:

Well I learnt something today :)

If anyone is interested, it's due to version 0 of swap no longer being supported - apparantly!

Quote:

http://kerneltrap.org/node/view/799?...ts_per_page=35
Note: Version 0 swap isn't supported, and you need to re-make your swap partition as version 1. Turn off your swap using 'swapoff -a', run 'mkswap -v1 /dev/xxx' where xxx is your swap device (for each swap device you have) and then you can reenable your swap using 'swapon -a'. Makes a big difference on machines that run into swap early.

elluva · 08-18-2004, 02:39 AM

thanks, now I know