On 11 Feb 2025, at 10:50, Zi Yan wrote: > This is a preparation patch, both added functions are not used yet. > > The added __split_unmapped_folio() is able to split a folio with > its mapping removed in two manners: 1) uniform split (the existing way), > and 2) buddy allocator like split. > > The added __split_folio_to_order() can split a folio into any lower order. > For uniform split, __split_unmapped_folio() calls it once to split > the given folio to the new order. For buddy allocator split, > __split_unmapped_folio() calls it (folio_order - new_order) times > and each time splits the folio containing the given page to one lower > order. > > Signed-off-by: Zi Yan <ziy@xxxxxxxxxx> > --- > mm/huge_memory.c | 349 ++++++++++++++++++++++++++++++++++++++++++++++- > 1 file changed, 348 insertions(+), 1 deletion(-) > Hi Andrew, Can you fold the patch below into this one? It addresses the error reported by syzbot at: https://lore.kernel.org/all/67af65cb.050a0220.21dd3.004a.GAE@xxxxxxxxxx/ and the concern raised by David Hildenbrand at: https://lore.kernel.org/linux-mm/db77d017-4a1e-4a47-9064-e335cb0313af@xxxxxxxxxx/. Let me know if you prefer a new version of the whole series. Thanks.
