Re: [RFC PATCH v2] mm: slub: print kernel addresses in slub debug messages
From: Miles Chen
Date: Mon Aug 12 2019 - 04:24:59 EST
On Fri, 2019-08-09 at 07:26 -0700, Matthew Wilcox wrote:
> 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.
You are right. There is no randomness in this platform. (I ran my test
code on Qemu with no randomness)