On Tue, Jun 08, 2021 at 06:48:22PM -0700, Ira Weiny wrote: > I'm still not 100% sure that these flushes are needed but the are not no-ops on > every arch. Would it be best to preserve them after the memcpy_to/from_bvec()? > > Same thing in patch 11 and 14. To me it seems kunmap_local should basically always call the equivalent of flush_kernel_dcache_page. parisc does this through kunmap_flush_on_unmap, but none of the other architectures with VIVT caches or other coherency issues does. Does anyone have a history or other insights here?
