Banana PI - ghostly swap

[pazzoide 0]

Hi on my Banana PI I have set no swapfile/partition since I never gonna use swapspace ram is gonna be enough. When I reboot I always find 499MB of swap

 

 swapon -s
Filename                                Type            Size    Used    Priority
/dev/zram1                              partition       255728  67052   5
/dev/zram2                              partition       255728  66836   5

But I can find no entry of /dev/zram1 nor /dev/zram2 in /etc/fstab. Can anybody explain me how is this possibile? And how to manage those partitions?

 

I found another /dev/zram0 which I think has to deal with log2ram since it is mounted on /var/log, is this correct?

 

Thanks

 

[Tido 187]

I guess you find your answer somewhere in here: https://forum.armbian.com/topic/5565-zram-vs-swap/

 

[pazzoide 0]

I can't figure it out... is zram written to disk like swap or is it written to ram memory?

[Tido 187]

RAM and compressed

[pazzoide 0]

Thank you, what I don't understand is where does this 500MB of zram space come from?

 

It is not a chip on the board as of producer's specs http://www.lemaker.org/product-bananapi-specification.html

It should not be part of the 1GB ram, since if I swapoff I can see the "Swp bar" (zram) dropping to 0 and filling the "Mem bar" with the missing MegaBytes.

 

 

So where does it come from???

[sfx2000 100]

4 hours ago, pazzoide said:

So where does it come from???

 

armbian-zram-config.service, which is closely linked to armbian-ramlog.service

 

Doesn't hurt to keep them enabled, but if one wants, you can disable them using systemctl disable <name of service>

 

There's benefit to keeping them on - reduces writes to the flash device.

[Tido 187]

8 hours ago, pazzoide said:

what I don't understand is

two (2) posts above yours there is a link. Did you read that thread ?

 

[yanjun11 0]

On 12/21/2018 at 3:48 AM, sfx2000 said:

 

armbian-zram-config.service, which is closely linked to armbian-ramlog.service

 

Doesn't hurt to keep them enabled, but if one wants, you can disable them using systemctl disable <name of service>

 

There's benefit to keeping them on - reduces writes to the flash device.

Thank you so much!

It's worked.

 

at the end of 【/usr/lib/armbian/armbian-zram-config】

add #   

 

like this:

case $1 in
123     *start*)
124     #   activate_zram_swap
125         activate_ramlog_partition
126         activate_compressed_tmp
127         ;;
128 esac
 

it close zram_swap.