On Tue, 18 Apr 2023 04:38:24 +0100 Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote: > On Tue, Apr 18, 2023 at 11:33:09AM +0800, zhaoyang.huang wrote: > > cma and page pointer printed via %p are hash value which make debug to be hard. > > change them to %px. > > Why does printing the page pointer make any sense at all? Surely the > PFN makes much more sense. I suppose one could correlate a particular hashed pointer with other debug output, see "ah, that's the same page". In which case one doesn't really care whether or not the address is hashed - it's just a cookie. This sounds thin. I doubt if a lot of thought went into the printk. If the page pointer isn't useful then how about we simply remove it from the message?
