On Wed, Mar 4, 2020 at 5:59 PM Vivek Goyal <vgoyal@xxxxxxxxxx> wrote: > > The device communicates FUSE_SETUPMAPPING/FUSE_REMOVMAPPING alignment > constraints via the FUST_INIT map_alignment field. Parse this field and > ensure our DAX mappings meet the alignment constraints. > > We don't actually align anything differently since our mappings are > already 2MB aligned. Just check the value when the connection is > established. If it becomes necessary to honor arbitrary alignments in > the future we'll have to adjust how mappings are sized. > > The upshot of this commit is that we can be confident that mappings will > work even when emulating x86 on Power and similar combinations where the > host page sizes are different. > > Signed-off-by: Stefan Hajnoczi <stefanha@xxxxxxxxxx> > Signed-off-by: Vivek Goyal <vgoyal@xxxxxxxxxx> Reviewed-by: Miklos Szeredi <mszeredi@xxxxxxxxxx>
