Re: [POC][RFC][PATCH 0/2] pstore/mm/x86: Add wildcard memmap to map pstore consistently

Steven Rostedt
2024-04-09T23:13:43Z

On Tue, 9 Apr 2024 22:25:33 +0000
"Luck, Tony" <tony.luck@intel.com> wrote:

> >> I forgot to mention that this makes it trivial for any machine that doesn't
> >> clear memory on soft-reboot, to enable console ramoops (to have access to
> >> the last boot dmesg without needing serial).
> >>
> >> I tested this on a couple of my test boxes and on QEMU, and it works rather
> >> well.
> >
> > I've long wanted a "stable for this machine and kernel" memory region
> > like this for pstore. It would make testing much easier.
>
> Which systems does this work on? I'd assume that servers (and anything
> else with ECC memory) would nuke contents while resetting ECC to clean
> state.
>

Well I tested it on a couple of chromebooks, a test box and a laptop (as
well as QEMU). I know that ramoops has an ecc option. I'm guessing that
would help here (but I'd have to defer to others to answer that).

-- Steve