[RESEND PATCH v6 00/14] drm/trace: Mirror DRM debug logs to tracefs

[Pekka Paalanen]

On Thu, 22 Jul 2021 09:48:00 -0400
Sean Paul <sean at poorly.run> wrote:

> On Thu, Jul 22, 2021 at 3:49 AM Pekka Paalanen <ppaalanen at gmail.com> wrote:
> >
> > On Wed, 21 Jul 2021 13:55:07 -0400
> > Sean Paul <sean at poorly.run> wrote:
> >  
> > > From: Sean Paul <seanpaul at chromium.org>
> > >
> > > Hi all,
> > > I just had the pleasure of rebasing this set on our CrOS downstream
> > > kernel and wanted to resend it for consideration once again. There
> > > hasn't been any resistence to the set AFAIK, just perhaps not enough
> > > motivation for anyone to hit the go bit. There was some interest from
> > > the msm folks about a month ago, and it has been an invaluable tool
> > > on CrOS for the past ~year. Hopefully someone can dig into this and
> > > provide some feedback so we can move this forward.
> > >
> > > Thanks!
> > >
> > > Sean
> > >
> > > Changes since last v6:
> > > -Rebased on drm-tip
> > >
> > > Original v6 of the set available here:
> > > https://patchwork.freedesktop.org/series/78133/
> > > https://lore.kernel.org/dri-devel/20200818210510.49730-1-sean@poorly.run/
> > >  
> >
> > Woo! Yes!
> >
> > Do you have a link to your userspace?
> >  
> 
> Hi Pekka,
> Probably less interesting that you're hoping for, but here are the
> CrOS patches to enable and collect tracing:
> 
> https://chromium-review.googlesource.com/c/chromiumos/platform2/+/2354674
> https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/2354392
> 
> 
> > You wouldn't happen to have already written a privileged userspace
> > service that would deliver on request the logs to non-privileged actors
> > like a compositor to be dumped in an error report?  
> 
> Our feedback report generation (log_tool.cc above) collects the logs
> (depending on user log preferences) from across the system and
> packages them up for submission when requested by the user. For
> drm_trace, we grab them from debugfs since we don't have tracefs
> mounted.
> 
> You could adapt this code to change the delivery method, but I'm not
> sure how much value it would add beyond writing your own purpose-built
> service.

Indeed. Thanks anyway! :-)
pq
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