On Wed, Feb 23, 2022 at 01:28:14AM +0000, Connor O'Brien wrote: > BTF mismatch can occur for a separately-built module even when the ABI > is otherwise compatible and nothing else would prevent successfully > loading. Add a new config to control how mismatches are handled. By > default, preserve the current behavior of refusing to load the > module. If MODULE_ALLOW_BTF_MISMATCH is enabled, load the module but > ignore its BTF information. > > Suggested-by: Yonghong Song <yhs@xxxxxx> > Suggested-by: Michal Suchánek <msuchanek@xxxxxxx> > Signed-off-by: Connor O'Brien <connoro@xxxxxxxxxx> Maybe reference the discussion thread as well? Link: https://lore.kernel.org/bpf/CAADnVQJ+OVPnBz8z3vNu8gKXX42jCUqfuvhWAyCQDu8N_yqqwQ@xxxxxxxxxxxxxx/ Otherwise Acked-by: Shung-Hsi Yu <shung-hsi.yu@xxxxxxxx> > --- > Hello, > > In the discussion regarding BTF compatibility & modules, there seemed > to be broad agreement that an option to ignore mismatches would be > reasonable. Currently the only option for handling this problem seems > to be to disable BTF entirely, so this would at least be an > incremental improvement. > > Thanks, > Connor
