On Fri, 13 Dec 2019 11:54:33 -0500
Sean Paul wrote:
> On Fri, Dec 13, 2019 at 01:34:46PM +0200, Pekka Paalanen wrote:
> > On Thu, 12 Dec 2019 15:32:35 -0500
> > Sean Paul wrote:
> >
> > > From: Sean Paul
> > >
> > > For a long while now, we (ChromeOS) have been struggling getting any
> > >
On Fri, Dec 13, 2019 at 11:54:36AM -0500, Steven Rostedt wrote:
> On Fri, 13 Dec 2019 11:47:03 -0500
> Sean Paul wrote:
>
> > > Why is there a separate trace event for each of these?
> > >
> >
> > To make it easier on userspace to enable just a single drm category.
> >
>
> But trace events
On Fri, Dec 13, 2019 at 01:34:46PM +0200, Pekka Paalanen wrote:
> On Thu, 12 Dec 2019 15:32:35 -0500
> Sean Paul wrote:
>
> > From: Sean Paul
> >
> > For a long while now, we (ChromeOS) have been struggling getting any
> > value out of user feedback reports of display failures (notably
On Fri, 13 Dec 2019 11:47:03 -0500
Sean Paul wrote:
> > Why is there a separate trace event for each of these?
> >
>
> To make it easier on userspace to enable just a single drm category.
>
But trace events can easily be filtered. Say you have a field called
category, you could then just
Hi Steven,
Thanks for the feedback!
On Thu, Dec 12, 2019 at 10:20:50PM -0500, Steven Rostedt wrote:
> On Thu, 12 Dec 2019 15:32:35 -0500
> Sean Paul wrote:
>
> >
> > What about trace_printk()? It doesn't give us the control we get from using
> > tracepoints and it's not meant to be left
On Fri, 13 Dec 2019 13:34:46 +0200
Pekka Paalanen wrote:
> Is there a way to pull out messages
> from /sys/kernel/debug/tracing/trace and filter them on reading instead
> of on writing?
FYI, you can mount the tracing directory without having to mount the
debug directory.
mount -t tracefs
On Fri, Dec 13, 2019 at 05:34:25PM +0200, Jani Nikula wrote:
> On Thu, 12 Dec 2019, Sean Paul wrote:
> > From: Sean Paul
> >
> > For a long while now, we (ChromeOS) have been struggling getting any
> > value out of user feedback reports of display failures (notably external
> > displays not
On Thu, 12 Dec 2019, Sean Paul wrote:
> From: Sean Paul
>
> For a long while now, we (ChromeOS) have been struggling getting any
> value out of user feedback reports of display failures (notably external
> displays not working). The problem is that all logging, even fatal
> errors (well, fatal
On Thu, 12 Dec 2019 15:32:35 -0500
Sean Paul wrote:
> From: Sean Paul
>
> For a long while now, we (ChromeOS) have been struggling getting any
> value out of user feedback reports of display failures (notably external
> displays not working). The problem is that all logging, even fatal
>
On Thu, 12 Dec 2019 15:32:35 -0500
Sean Paul wrote:
>
> What about trace_printk()? It doesn't give us the control we get from using
> tracepoints and it's not meant to be left sprinkled around in code.
Not to mention that trace_printk() is not for production use (only for
developers debugging
From: Sean Paul
For a long while now, we (ChromeOS) have been struggling getting any
value out of user feedback reports of display failures (notably external
displays not working). The problem is that all logging, even fatal
errors (well, fatal in the sense that a display won't light up) are
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