Could not format the device : [Error 5] Input/output error

[supakeen]

In our CI I'm seeing some errors when creating an erofs for fedora live media. On Fedora 44 (erofs-utils-1.8.10); and Fedora 45 (erofs-utils-1.9.1) and only on aarch64 I'm getting (after quite some time) a:

<E> erofs: Could not format the device : [Error 5] Input/output error

At first I thought our CI runners might be out of disk; but they have enough and the error I've seen previously related to diskspace was different.

What could cause the above?

Builds of these on x86 are working as normal, and builds on Fedora 42 and 43 (both on erofs-utils-1.8.10) succeed on all architectures 🙂

[hsiangkao]

Hi @supakeen , could you confirm if /tmp is a tmpfs? if yes, you might need TMPDIR= to specify another directory with enough space for now.
I'm highly skeptical if it's the fragment temporary file in /tmp is huge and tmpfs is used for /tmp, so in that case currently TMPDIR is needed to specify another dir in the local filesystem instead.

[supakeen]

Hi @supakeen , could you confirm if /tmp is a tmpfs? if yes, you might need TMPDIR= to specify another directory with enough space for now.
I'm highly skeptical if it's the fragment temporary file in /tmp is huge and tmpfs is used for /tmp, so in that case currently TMPDIR is needed to specify another dir in the local filesystem instead.

Hey, I'll do some looking into this tomorrow; thanks for the hint!

[hsiangkao]

@supakeen mind taking another try?

[supakeen]

@supakeen mind taking another try?

Sorry, I will. Things got a bit busy. We are indeed using a tmpfs so it's the likely reason but I'll confirm.

[hsiangkao]

@supakeen mind taking another try?

Sorry, I will. Things got a bit busy. We are indeed using a tmpfs so it's the likely reason but I'll confirm.

ok, thanks for the infos.

[supakeen]

Can confirm that with either more RAM (larger tmpfs) or setting TMPDIR to /var/cache that my builds succeed, at least locally.