[systemd-devel] Fwd: System fails to create zram on startup, but I can do so manually

[Torstein Sørnes]

I get an error that the device is not found even though it seems to exist
with ls.
$ /usr/lib/systemd/system-generators/zram-generator --setup-device
/dev/zram0
             (base) 19:25:17
Error: Device /dev/zram0 not found
$ ls -Ah -l /dev/zram0

    (base) 19:25:19
brw-rw----. 1 root disk 252, 0 2024-11-08 19:22 /dev/zram0

$ cat /etc/systemd/zram-generator.conf

    (base) 19:25:26
[zram0]
zram-size = 32G

On Thu, Nov 7, 2024 at 7:35 PM Michal Koutný <mkoutny at suse.com> wrote:

> Hello Torstein.
>
> On Tue, Nov 05, 2024 at 03:51:31PM GMT, Torstein Sørnes <
> t.soernes at gmail.com> wrote:
> > I have a Fedora 41 laptop with 32GB of ram.
> >
> > On startup, this shows in the journal:
> > ```
> > nov. 05 13:58:32 D2S3Q34 zram-generator[1059]: Error: Failed to configure
> > disk size into /sys/block/zram0/disksize
> > nov. 05 13:58:32 D2S3Q34 zram-generator[1059]: Caused by:
> > nov. 05 13:58:32 D2S3Q34 zram-generator[1059]:     Cannot allocate memory
> > (os error 12)
> > nov. 05 13:58:32 D2S3Q34 kernel: zram-generator: vmalloc error: size
> > 131072000000000, exceeds total pages, mode:0xdc0(GFP_KERNEL|__GFP_ZERO),
>   ^^^^^^^^^^^^^^^
> This value looks suspicious.
>
> > After starting up, I can execute this series of commands, and
> successfully
> > create a 32GB swap:
> > ```
> > sudo swapoff /dev/zram0
> >                                sudo zramctl --reset /dev/zram0
> >                                sudo zramctl --find --size 32G
>
> Notice zramctl operation may differ from zram-generator,
> perhaps try with:
> /usr/lib/systemd/system-generators/zram-generator --setup-device /dev/zram0
>
> and what is in your zram-generator.conf?
>
> Thanks,
> Michal
>
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