On Sun, May 08, 2022 at 09:31:12PM +0100, Matthew Wilcox (Oracle) wrote: > This is a "weak" conversion which converts straight back to using pages. > A full conversion should be performed at some point, hopefully by > someone familiar with the filesystem. What worries me about the "weak" conversion is that ext4_read_folio() (formerly ext4_read_page()) is going to completely the wrong thing if the folio contains more than a single page. This seems to be... scary. How are callers of aops->read_folio() supposed to know whether the right thing or the wrong thing will happen if a random folio is passed to aops->read_folio()? - Ted
