Re: KASLR causes intermittent boot failures on some systems

[Baoquan He]

On 04/24/17 at 05:41pm, Thomas Garnier wrote:
> On Mon, Apr 24, 2017 at 4:07 PM, Baoquan He <bhe@xxxxxxxxxx> wrote:
> > Yeah, according to my debugging tracking, it goes as Dan said. And the
> > is_ram is REGION_DISJOINT. And till arch_add_memory, the parameters
> > passed to arch_add_memory are "arch_add_memory, align_start:0x10000000000, align_size:0x3000000000",
> > seems it's going well.
> 
> Hum ok, I hope it was another path given it seems the page table is
> correctly setup on this one.
> 
> Maybe looking at the PTEs with and without crash might help? (setting
> this if statement to 1:
> http://lxr.free-electrons.com/source/arch/x86/mm/init_64.c#L360)

The page_size_mask is PG_LEVEL_1G, it should only enter into
phys_pud_init and return.