On Wed, Dec 07, 2022 at 12:29:56PM -0600, Mike Christie wrote: > I think you need to make this configurable. > > If you use loop with pscsi, then the sgl that loop now gets might be too > big for the backend device so we now fail in: > > pscsi_map_sg -> blk_rq_append_bio -> ll_back_merge_fn > > So some users might be relying on the smaller limit. Note that this could happen even now, you just need sufficiently horrible hardware to pass through for it. But yes, for pscsi this needs to look at the underlying device, and increasing the limit might be a good point to do that. I'm not sure it's worth to add user configuration, though.
