Comment # 201 on bug 1063638 from Wenruo Qu

(In reply to Simcha Lerner from comment #200)
> I see a lot of automated posts lately, but they're not particularly
> informative to the uninitiated.
> 
> I'd appreciate it if someone could summarize the current status of this bug
> (these bugs?) in terms of what fixes have been put into place (I'm running
> the latest Tumbleweed on some systems, Leap 15.1 on others) and what the
> current roadmap is for further work.
> 
> Thank you very much.

In short, the problem should be solved in upstream after v5.1 and
SLE12-SP3/SLE15.

The fix is skipping tree blocks if they are not modified after balance.

It's still possible if there are a lot of writes along with balance, but even
for that case, the load should be much smaller than the old behavior.

I forgot to close this bug, sorry for that.