> It's known that ext4 has these symptoms with parity raid. Interesting. I'm not aware of that problem. One of the systems that hit this hang has been running with ext4 on an MD RAID-5 array with every kernel since at least 5.1 and never had an issue until this regression. > To make sure it's a raid problem you should try another filesystem or > remount it with stripe=0. That's a good suggestion, so I switched it to use XFS. It can still reproduce the hang. Sounds like this is probably a different problem than the known ext4 one. Thanks, -- Dan
