Re: Query regarding Linux Arm pagetable setup

On Thu, May 05, 2016 at 05:59:01PM +0100, Catalin Marinas wrote:
> On Thu, May 05, 2016 at 05:04:57PM +0100, Russell King - ARM Linux wrote:
> > On Thu, May 05, 2016 at 04:17:08PM +0530, Dushyant Behl wrote:
> > > Also are there any other kernel pages which are marked with similar
> > > user bit and read only permissions in the pagetables with possible
> > > aliasing in the kernel's address space too?
> > 
> > No.
> 
> Actually, most read-only user pages (e.g. mmap'ed code) have an alias in
> the kernel linear mapping or temporarily in highmem (after kmap).

If you want to be strict about it, all pages can end up in that state.

I assumed, however, that the OP was asking about pages similar to the
special vector page.

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