Very misleading article
Five minutes of proper research would have shown it is a bug in the MD RAID0 system that has nothing to do with EXT4 or any other file system.
Here's the description from Eric Work, who wrote the fix:
This bug affects systems with kernel 3.19.7+ or 4.0.2+ running any filesystem on top of MD RAID 0 that supports and enables TRIM. No other RAID levels are affected. I believe Intel fakeraid is also affected. If you don't use fstrim or have the 'discard' option enabled in fstab then you wouldn't be affected. Removing these TRIM options is also the workaround.
Biting the hand that feeds IT
