zswap failed

[Mathias]

Hi!

 

I've had for quite a while the following error messages at startup:

[   39.095667] zswap: default zpool zbud not available
[   39.095670] zswap: pool creation failed

 

This has happened with various 5.0, 5.1, 5.2 and now 5.3 kernels. Any idea what I should do to fix it?

Mathias

[Igor]

9 hours ago, Mathias said:

This has happened with various 5.0, 5.1, 5.2 and now 5.3 kernels. Any idea what I should do to fix it?

On which kernel specifically do you miss this feature?

 

Otherwise: # CONFIG_ZPOOL is not set -> CONFIG_ZPOOL=y

[Mathias]

I have always been using precompiled kernels from Armbian or Ayufan. Right now, I am on 5.3rc4 from Armbian, when I do 'cat /boot/config-5.3.0-rc4-rockchip64 | grep ZPOOL' I get 'CONFIG_ZPOOL=y'. Everything should work, I've also tried adding lz4 and lz4_compress to /etc/initramfs-tools/modules, reran initramfs and rebooted, to no avail...

 

Here is by 'uname -a': Linux rockpro64 5.3.0-rc4-rockchip64 #5.96 SMP PREEMPT Thu Sep 5 17:01:09 CEST 2019 aarch64 GNU/Linux

 

Mathias

 

[Igor]

On a quick scan and compare with other configs, there is nothing wrong with the config and we didn't change anything relevant. Perhaps here
 

1 minute ago, Mathias said:

rc4

is the problem? 

[Mathias]

I don't know, this is Armbian's dev kernel for the Rockpro64: from apt-cache: linux-image-dev-rockchip64 - Linux kernel, version 5.3.0-rc4-rockchip64 (ie I haven't recompiled it, I just took the pre-compiled package). I'm also wondering if I'm the only one to have this problem or if this is really a bug in the dev kernel...

 

[Igor]

2 minutes ago, Mathias said:

from apt-cache: linux-image-dev-rockchip64

DEV kernels (in stable repository) are auto-made - it would be the same if you build it on your own without any change. They are not tested and ... well, there must be bugs otherwise we would label them differently.

 

I was playing with it yesterday, but ... can't recall if there was an issue here since I was checking something else. Let's wait if someone else has tried it.

[Mathias]

By the way, I've found another bug with the dev kernel (5.3.0-rc4): there is no possibility to control the fan anymore (/sys/class/hwmon/hwmon0/ does not exists anymore). It works fine on Ayufan's 5.3rc4 but not with Armbian's dev kernel.