BTRFS messages in DMESG?

I decided to run a balance on my Pool today.

This seems to be running smooth, its 80% done, without any issues, it seems.

But DMESG shows some instances of this:

[390384.582746] BTRFS info (device sdb): found 292 extents
[390385.636504] BTRFS info (device sdb): relocating block group 28483803283456 flags 257

All of them for sdb. The drive doesn’t show any SMART errors or anything like that.

Is this something I should worry about?

That’s normal.

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