[dm-devel] Proper way to test RAID456?

[Qu Wenruo]

Hi,

Recently I'm working on refactor btrfs raid56 (with long term objective
to add proper journal to solve write-hole), and the coverage of current
fstests for btrfs RAID56 is not that ideal.

Is there any project testing dm/md RAID456 for things like
re-silvering/write-hole problems?

And how you dm guys do the tests for stacked RAID456?

I really hope to learn some tricks from the existing, tried-and-true
RAID456 implementations, and hopefully to solve the known write-hole
bugs in btrfs.

Thanks,
Qu