Flexo cannot save and serve files on linux 5.10.3 and OpenZFS 2.0.0

[cuberoot74088]

Hi,

maybe this is more of an information...

I am using flexo with (zfs) linux 5.10.3 and OpenZFS 2.0.0, coming from 5.9.14 everything was working.

From my research, I found it is due to a change in the kernel and how zfs does (or not) implement sendfile (or some sort of directIO)...
(had the sendfile issue with nginx yesterday and had to remove it to get it up and running)

here is an link to the issue openzfs/zfs#1156 and another PR working on directIO openzfs/zfs#10018

So my guess is, that flexo does some kind of "directIO" and this is failing now (with my setup).

However, I can confirm, it is still running with 5.10.3 and ext4 ...
So the problem is likely to be outside of flexo, I assume... but know you know about it ;-)

Thanks

[cuberoot74088]

The issue was solved (refs openzfs/zfs#11378 and openzfs/zfs#11351) and is available in the latest release OpenZFS 2.0.1 (https://github.com/openzfs/zfs/releases/tag/zfs-2.0.1).

As of today linux 5.10.5 and zfs 2.0.1 is available and flexo (and nginx) are working as before.

[nroi]

Good to hear, thanks for reporting this.