On 05/16/2013 07:53 PM, Eric W. Biederman wrote: > > That is completely and totally orthogonal to this change. > > read_oldmem may have problems but in practice on a large systems those > problems are totally dwarfed by real life performance issues that come > from playing too much with the page tables. > > I really don't find bringing up whatever foundational issues you have > with read_oldmem() appropriate or relevant here. > Well, it is in the sense that we have two pieces of code doing the same thing, each with different bugs. -hpa