Re: [RFC PATCH v2] mm: slub: print kernel addresses in slub debug messages

[Matthew Wilcox]

On Fri, Aug 09, 2019 at 10:11:58PM +0800, Miles Chen wrote:
> On Thu, 2019-08-08 at 19:46 -0700, Matthew Wilcox wrote:
> > On Fri, Aug 09, 2019 at 09:08:37AM +0800, miles.chen@xxxxxxxxxxxx wrote:
> > > INFO: Slab 0x(____ptrval____) objects=25 used=10 fp=0x(____ptrval____)
> > 
> > ... you don't have any randomness on your platform?
> 
> We have randomized base on our platforms.

Look at initialize_ptr_random().  If you have randomness, then you
get a siphash_1u32() of the address.  With no randomness, you get this
___ptrval___ string instead.