I confirm severe kernel memory management problems on 5.9 and 5.10-rc's.
As of now (5.9.3 and 5.10-rc2) are unusable.
EDIT:
I just compiled 5.9.4 - same situation - unusable.
EDIT 2:
They released 5.9.5 shortly after 5.9.4. Compiled it and it has no leak. It was panfrost leaking.
As of now (5.9.3 and 5.10-rc2) are unusable.
EDIT:
I just compiled 5.9.4 - same situation - unusable.
EDIT 2:
They released 5.9.5 shortly after 5.9.4. Compiled it and it has no leak. It was panfrost leaking.