On Wed, Sep 27, 2017 at 10:13:51AM -0700, Dan Williams wrote: > As far as I can see "Offset can be greater than PAGE_SIZE" is the only > safe assumption for core code. It seems completely bogus to me, but if it is the current assumption we'll have to document it. But this brings me back to that our scatterlists are a pretty horrible data structure to start with as they try to mix virtual and physical addressing together. We'd be much better of by passing a chain of bio_vecs where we just need virtual addresses, a chain of [bus_addr,len] pairs where we just need a physical address, and both where we need both instead of this giant structure that tries to do both at the same time..
