Re: [PATCH] x86/x2apic: introduce a mixed physical/cluster mode

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Fri, Nov 24, 2023 at 05:15:34PM -0800, Elliott Mitchell wrote:
> On Thu, Nov 23, 2023 at 10:39:37AM +0100, Roger Pau Monné wrote:
> > On Tue, Nov 21, 2023 at 04:56:47PM -0800, Elliott Mitchell wrote:
> > > It was insisted that full logs be sent to xen-devel.  Perhaps I am
> > > paranoid, but I doubt I would have been successful at scrubbing all
> > > hardware serial numbers.  As such, I was willing to post substantial
> > > sections, but not everything.
> > 
> > Can you please point out which hardware serial numbers are you
> > referring to, and where are they printed in Xen dmesg?
> 
> I didn't confirm the presence of hardware serial numbers getting into
> Xen's dmesg, but there was a lot of data and many hexadecimal numbers.
> With 4000 lines of output, checking for concerning data is troublesome.

4000 lines of output from Xen dmesg seems quite suspicious.  Xen dmesg
on a fully booted box is ~400 lines on my local box.  That might get
quite longer if you have a box with a lot of memory region, or a lot
of CPUs.

> There was enough for alarms to trigger.

That's fine, but without pointing out which information is sensitive,
it's very unlikely such concerns will ever get fixed.

Could you at least go over the log and point out the first instance of
such line that you consider contains sensitive information?

The primary way we have to diagnose and solve issues reported by users
is based on Xen dmesg, so if it's impossible to provide it for privacy
reasons that's an issue that we need to address.

Regards, Roger.