Arch Linux

aaronglz23

Member

Registered: 2019-12-06

Posts: 17

[SOLVED] zram0: /etc/udev/rules.d/99-zram.rules:1 Failed to write...

I set Zram following the Arch Wiki steps https://wiki.archlinux.org/index.php/Im … m_or_zswap

In my case I created a 4GB Zram diskspace and 1 device:

(I have 16GB of RAM)

# modprobe zram
# echo lz4 > /sys/block/zram0/comp_algorithm
# echo 4G > /sys/block/zram0/disksize
# mkswap --label zram0 /dev/zram0
# swapon --priority 100 /dev/zram0

/etc/modules-load.d/zram.conf

zram

/etc/modprobe.d/zram.conf

options zram num_devices=1

/etc/udev/rules.d/99-zram.rules

KERNEL=="zram0", ATTR{disksize}="4G" RUN="/usr/bin/mkswap /dev/zram0", TAG+="systemd"

/etc/fstab

/dev/zram0 none swap defaults 0 0

And now I have this issue:

Dec 20 15:56:17 aspire-e5-573 systemd-udevd[308]: zram0: /etc/udev/rules.d/99-zram.rules:1 Failed to write ATTR{/sys/devices/virtual/block/zram0/disksize}, ignoring: Device or resource busy

And the file /sys/devices/virtual/block/zram0/disksize contains:

4294967296

So I need to know if I did something wrong, I don't see the problem, apparently, the Zram is working well, I have 4GB of swap space, but my doubt is if it's necessary to create 2 devices Zram0 and Zram1 according to the wiki?? Thanks

Last edited by aaronglz23 (2019-12-20 17:13:59)

latalante1

Member

Registered: 2018-08-30

Posts: 110

Re: [SOLVED] zram0: /etc/udev/rules.d/99-zram.rules:1 Failed to write...

Add the zram module to mkinitcpio.conf and regenerate it.

aaronglz23

Member

Registered: 2019-12-06

Posts: 17

Re: [SOLVED] zram0: /etc/udev/rules.d/99-zram.rules:1 Failed to write...

It works, but now I have a new issue:

Dec 20 17:05:02 aspire-e5-573 systemd-udevd[319]: could not read from '/sys/module/pcc_cpufreq/initstate': No such device

aaronglz23

Member

Registered: 2019-12-06

Posts: 17

Re: [SOLVED] zram0: /etc/udev/rules.d/99-zram.rules:1 Failed to write...

Ok, I solved with:

sudo modprobe pcc_cpufreq

And now 0 issues. Thanks