Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> wrote: > The migration code used to be able to migrate dirty 9p folios by writing > them back using writepage. When the writepage method was removed, > we neglected to add a migrate_folio method, which means that dirty 9p > folios have been unmovable ever since. This reduced our success at > defragmenting memory on machines which use 9p heavily. > > Fixes: 80105ed2fd27 (9p: Use netfslib read/write_iter) > Cc: stable@xxxxxxxxxxxxxxx > Cc: David Howells <dhowells@xxxxxxxxxx> > Cc: v9fs@xxxxxxxxxxxxxxx > Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> Reviewed-by: David Howells <dhowells@xxxxxxxxxx>
