Re: [PATCH v2 4/4] drm/panic: Add a qr_code panic screen

[Jocelyn Falempe]

On 09/07/2024 11:12, Greg KH wrote:
> On Tue, Jul 09, 2024 at 11:11:35AM +0200, Greg KH wrote:
> > On Tue, Jul 09, 2024 at 10:40:10AM +0200, Jocelyn Falempe wrote:
> > > +config DRM_PANIC_SCREEN_QR_CODE_URL
> > > +	string "Base url of the QR code in the panic screen"
> > > +	depends on DRM_PANIC_SCREEN_QR_CODE
> > > +	help
> > > +	  This option sets the base url to report the kernel panic. If it's set
> > > +	  the qr code will contain the url and the kmsg compressed with zlib as
> > > +	  url parameter. If it's empty, the qr code will contain the kmsg as
> > > +	  uncompressed text only.
> >
> > meta-comment, should we by default do this on a kernel.org domain so
> > that no specific distro has to worry about hosing this type of web
> > service?
>
> Also, do you have the backend source for this to show how anyone can
> host it themselves as well?  We can't add features to the kernel that no
> one but closed-source implementations will use for obvious reasons.

I've made a proof of concept backend here:
https://github.com/kdj0c/panic_report/

And the javascript to decode the kmsg trace is here (under MIT licence):
https://github.com/kdj0c/panic_report/blob/main/docs/panic_report.js

It uses the pako js library to uncompress the zlib data, which is also 
under MIT/Zlib licence https://github.com/nodeca/pako/

If kernel.org want to host a default service for that, that would be 
great. It can be linked with https://bugzilla.kernel.org to easily 
create a bug, or look for similar bugs.


Best regards,

--

Jocelyn


> thanks,
>
> greg k-h