how to use swap partition instead of file

[steelskinz]

Hi there,
As i had problem with my USB key i formatted it and i want to know if it is possible to use a swap partition instead of creating a swap file under extX partition.
I don't see it when i type "mount" and don't really know how to do it.
It is labelled SWAP on sdb2.

Thanks.

 

[TeHashX]

Try

mkswap /tmp/mnt/sdb2
swapon /tmp/mnt/sdb2

Now verify with free command

free

 

[TeHashX]

If is not working, post output from

mount
fdisk -l

 

[steelskinz]

Thanks. Will try it tonight. Won't it delete my other ext4 partition on the same device ?

 

[steelskinz]

Disk /dev/sda: 121438208 sectors, 57.9G
Logical sector size: 512
Disk identifier (GUID): c36f47c9-6879-49e1-9605-0851cb43335f
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 121438174

Number Start (sector) End (sector) Size Code Name
1 2048 2099199 1024M 0700 SWAP
2 2099200 121436159 56.9G 0700 MEDIA
Found valid GPT with protective MBR; using GPT

Disk /dev/sdb: 121438208 sectors, 57.9G
Logical sector size: 512
Disk identifier (GUID): 57a96495-b6fd-408c-83d5-97c0bd2e2ca2
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 121438174

Number Start (sector) End (sector) Size Code Name
1 2048 121436159 57.9G 0700 BT

 

[TeHashX]

And "mount" output?

 

[steelskinz]

rootfs on / type rootfs (rw)
/dev/root on / type squashfs (ro,relatime)
devtmpfs on /dev type devtmpfs (rw,relatime,size=127756k,nr_inodes=31939,mode=755)
proc on /proc type proc (rw,relatime)
tmpfs on /tmp type tmpfs (rw,relatime)
sysfs on /sys type sysfs (rw,relatime)
devpts on /dev/pts type devpts (rw,relatime,mode=600)
/dev/mtdblock4 on /jffs type jffs2 (rw,noatime)
usbfs on /proc/bus/usb type usbfs (rw,relatime)
/dev/sdb1 on /tmp/mnt/BT type ext2 (rw,nodev,relatime,errors=continue,user_xattr)
/dev/sda2 on /tmp/mnt/MEDIA type ext4 (rw,nodev,relatime,barrier=1,data=ordered)

 

[TeHashX]

Ok, try

mkswap /dev/sda1
swapon /dev/sda1

 

[Diamond67]

https://mydevtutorials.wordpress.com/2014/01/10/how-to-activate-swap-on-asus-rt-ac68u-router/

 

[steelskinz]

It works until reboot. Guess I have to add swapon /dev/sda1 in post-mount as mention. Thanks.

 

[TeHashX]

It works until reboot. Guess I have to add swapon /dev/sda1 in post-mount as mention. Thanks.

Yes, add at the end of /jffs/scripts/post-mount

swapon /dev/sda1

 

[steelskinz]

Work great ! Thank you.

Ps : TeHashX thanks for your website dude !