On Sun, Apr 07, 2024 at 09:19:31PM +0800, Ming Lei wrote:
> When one stacking device is over one device with virt_boundary_mask and
> another one with max segment size, the stacking device have both limits
> set. This way is allowed before d690cb8ae14b ("block: add an API to
> atomically update queue limits").
>
> Relax the limit so that we won't break such kind of stacking setting.
No, this is broken as discussed before. With a virt_boundary_mask
we create a segment for every page (that is device page, which usually
but not always is the same as the Linux page size). If we now also
limit the segment size, we fail to produce valid I/O.
The problem is that that neither the segment_size nor the
virtual_boundary should be inherited by a stackable device and we
need to fix that.
