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In Song's md-next branch


commit d3ee2d8415a6256c1c41e1be36e80e640c3e6359
Author: Xiao Ni <xni>
Date:   Wed Sep 2 20:00:23 2020 +0800
md/raid10: improve discard request for far layout
    

commit bcc90d280465ebd51ab8688be86e1f00c62dccf9
Author: Xiao Ni <xni>
Date:   Wed Sep 2 20:00:22 2020 +0800
md/raid10: improve raid10 discard request

Hi all

The patch set which can fix this problem has data corruption problem. I'm looking at this problem.
And I'll send the patch again to upstream once the problem is fixed.

You can check the detail about the data corruption problem at https://www.spinics.net/lists/kernel/msg3765302.html

Thanks
Xiao

The root cause has been found. https://marc.info/?l=linux-raid&m=160880530629526&w=2

#16 patch set submitted into RHEL-8.5.0
MR: https://gitlab.com/redhat/rhel/src/kernel/rhel-8/-/merge_requests/554

Customer has informed that it will take one or two weeks for them to test the kernel.

this bug has been fixed by patches for bug 1956355 and is now a TestOnly bug.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Moderate: kernel security, bug fix, and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2021:4356