Re: [PATCH v2 1/2] mm: uninitialized struct page poisoning sanity checking

From: Pavel Tatashin
Date: Tue Apr 03 2018 - 22:18:30 EST


On 18-03-15 20:43:14, Sasha Levin wrote:
> On Thu, Mar 15, 2018 at 03:04:30PM -0400, Pavel Tatashin wrote:
> >>
> >> Attached the config. It just happens on boot.
> >
> >Hi Sasha,
> >
> >I have tried unsuccessfully to reproduce the bug in qemu with 20G RAM,
> >and 8 CPUs.
> >
> >Patch "mm: uninitialized struct page poisoning sanity" should be improved
> >to make dump_page() to detect poisoned struct page, and simply print hex
> >in such case. I will send an updated patch later.
> >
> >How do you run this on Microsoft hypervisor? Do I need Windows 10 for
> >that?
>
> Booting a Linux VM on Azure would be the easiest, and free too :)

Hi Sasha,

I have registered on Azure's portal, and created a VM with 4 CPUs and 16G
of RAM. However, I still was not able to reproduce the boot bug you found.

Could you please try an updated patch that I sent out today, the panic
message should improve:

https://lkml.org/lkml/2018/4/3/583

Thank you,
Pasha