On Dec 9, 2020, at 2:36 PM, Mike Snitzer [off-list ref] wrote:

On Wed, Dec 09 2020 at  4:58pm -0500,
Song Liu [off-list ref] wrote:

quoted

This reverts commit f0e90b6c663a7e3b4736cb318c6c7c589f152c28.

Matthew Ruffell reported data corruption in raid10 due to the changes
in discard handling [1]. Revert these changes before we find a proper fix.

[1] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1907262/ 
Cc: Matthew Ruffell <redacted>
Cc: Xiao Ni <redacted>
Cc: Mike Snitzer <redacted>
Signed-off-by: Song Liu <redacted>

If you're reverting all the MD code that enabled this DM change, then
obviously the DM change must be reverted too.  But please do _not_
separate the DM revert from the MD reverts.

Good point! I should have thought about it through. 

Thanks,
Song

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