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Before adding more logic, split > __folio_freeze_and_split_unmapped() into an anon and a file variant so > each path can evolve independently. The two paths shared little beyond > the folio freeze call, the LRU locking, and the unfreeze skeleton, but > differed in all other per-folio bookkeeping and routines. > > While splitting, some cleanups become easy to apply, and helped drop a > few now-redundant checks. Also introduce a folio iteration helper to > avoid a common pitfall of iterating post-split sub-folios: a sub folio > might get freed mid-iteration as pointed out by Zi [1]. > > Link: https://lore.kernel.org/linux-mm/DKJSFCLP967N.YBR4DNK1NM2N@nvidia.c= om/ [1] > Signed-off-by: Kairui Song > --- > mm/huge_memory.c | 119 +++++++++++++++++++++++++++++++++++--------------= ------ > 1 file changed, 75 insertions(+), 44 deletions(-) > LGTM. Reviewed-by: Zi Yan --=20 Best Regards, Yan, Zi