[Intel-gfx] [PATCH] drm/i915: Reinstate error level message for non-simulated gpu hangs

[Chris Wilson]

On Wed, Oct 01, 2014 at 10:13:00AM +0200, Daniel Vetter wrote:
> On Wed, Oct 01, 2014 at 07:28:39AM +0100, Chris Wilson wrote:
> > On Wed, Oct 01, 2014 at 01:04:19AM +0200, Daniel Vetter wrote:
> > > This seems to have been accidentally lost in
> > > 
> > > commit be62acb4cce1389a28296852737e3917d9cc5b25
> > > Author: Mika Kuoppala <mika.kuoppala at linux.intel.com>
> > > Date:   Fri Aug 30 16:19:28 2013 +0300
> > > 
> > >     drm/i915: ban badly behaving contexts
> > > 
> > > Without this real gpu hangs only log output at info level, which gets
> > > filtered away by piglit's testrunner.
> > 
> > A successful GPU hang is not an error. Might be a warn or a notice, but
> > it certainly isn't a driver error.
> 
> Well not of the kernel driver, but might very well be a bug in the
> userspace driver. With this piglit marks tests that hung the gpu as
> dmesg-fail, without this they might even pass. Ken raised this on irc and
> I agree that it's a must-have feature for developers that their testsuite
> can tell them when stuff broke. Provding this some other way is a lot more
> work and imo should be done in a separate patch, this here is just the
> minimal fix for this regression.

I strongly disagree that we should be working around self-imposed
limitations of the test suite by making users believe their kernel is
broken.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre