mm: split a folio in minimum folio order chunks
split_folio() and split_folio_to_list() assume order 0, to support
minorder we must expand these to check the folio mapping order and use
that.
Set new_order to be at least minimum folio order if it is set in
split_huge_page_to_list() so that we can maintain minimum folio order
requirement in the page cache.
Update the debugfs write files used for testing to ensure the order
is respected as well.
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
2 files changed
