[lustre-devel] HELP: why introduce BFL

Hi Lustre devs,

I came across *mdt_reint_rename*() and noticed the global lock *BFL.* Given
that parent and child locks are already acquired in a consistent order,
preventing deadlock, I'm unclear about the necessity of the BFL lock
specifically for cross-MDT renames. Furthermore, when setting `remote` only
source parent/object are considered, why exclude the target parent?

Correct me if I misunderstood the code above. Thank you for your input.

Best regards,
kg.xu

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