In Debian11 LVM environment, the system becomes unstable when the snapshot is executed.

[elastio]

In Debian11 LVM environment, the system becomes unstable when the snapshot is executed.

[tsat21]

The same behavior was observed in the following distributions.
-ubuntu20.04LTS LVM(kernel-5.11.0-34, No issue up to kernel-5.8.x.)
-openSUSE15.3 LVM(kernel-5.3.18-59.19)

[xretia]

same problem, take snapshot and do backup,
backup system disk to user disk,

system and system disk works properly,
but user disk hangs up.

[nickchen-cpu]

#119

Because the other non-snapshot lv's bio can't find its orig_mrf(which should've been dm_submit_bio instead of blk_mq_submit_bio).

If we handle tracing_mrf, find_orig_fops, __tracer_should_reset_mrf properly, this issue can be fixed.

Best Regards,
Nick