> Folios of order 1 have no space to store the deferred list. This is > not a problem for the page cache as file-backed folios are never > placed on the deferred list. All we need to do is prevent the core > MM from touching the deferred list for order 1 folios and remove the > code which prevented us from allocating order 1 folios. > > Link: https://lore.kernel.org/linux-mm/90344ea7-4eec-47ee-5996-0c22f42d6a6a@xxxxxxxxxx/ > Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> This is something I was looking forward to while developing the LBS support for XFS. As I am preparing the next version of LBS patches for XFS, I could add this patch on top and start running fstest for 8k block size on a system with 4k page size. I will let you know if something blows up. I haven't seen any new version of this series, so I will use this patch as a starting point to test 8k filesystem blocksize. -- Regards, Pankaj
