On Wed, Aug 10, 2022 at 09:43:58PM +0100, Matthew Wilcox wrote: > To avoid duplicating work with you or Christoph ... it seems like the > plan is to kill ->writepage entirely soon, so there's no point in me > doing a sweep of all the filesystems to convert ->writepage to > ->write_folio, correct? While I won't commit to concrete definition of "soon" I think that is the general plan, and I don't think converting ->writepage to ->write_folio is needed. > I assume the plan for filesystems which have a writepage but don't have > a ->writepages (9p, adfs, affs, bfs, ecryptfs, gfs2, hostfs, jfs, minix, > nilfs2, ntfs, ocfs2, reiserfs, sysv, ubifs, udf, ufs, vboxsf) is to give > them a writepages, and ->migrate_folio if missing, yes. > modelled on iomap_writepages(). Seems that adding > a block_writepages() might be a useful thing for me to do? We have mpage_writepages which basically is the ->writepages counterpart to block_write_full_page. The only caveat is of course that it can use multi-block mappings from the get_bock callback, so we need to make sure the file systems don't do anything stupid there.
