Re: [PATCH v2 2/3] drm/i915: add a dedicated workqueue inside drm_i915_private

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On Fri, 2023-05-26 at 14:30 +0300, Jani Nikula wrote:
> On Wed, 24 May 2023, Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxxxxxxx> wrote:
> > On 24/05/2023 10:05, Luca Coelho wrote:
> > > In order to avoid flush_scheduled_work() usage, add a dedicated
> > > workqueue in the drm_i915_private structure.  In this way, we don't
> > > need to use the system queue anymore.
> > > 
> > > This change is mostly mechanical and based on Tetsuo's original
> > > patch[1].
> > > 
> > > Link: https://patchwork.freedesktop.org/series/114608/ [1]
> > > Cc: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
> > > Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
> > > Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
> > > Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> > > Signed-off-by: Luca Coelho <luciano.coelho@xxxxxxxxx>
> > > ---
> > >   drivers/gpu/drm/i915/display/intel_display.c  |  5 ++--
> > >   .../drm/i915/display/intel_display_driver.c   |  2 +-
> > >   drivers/gpu/drm/i915/display/intel_dmc.c      |  2 +-
> > >   drivers/gpu/drm/i915/display/intel_dp.c       |  2 +-
> > >   .../drm/i915/display/intel_dp_link_training.c |  3 ++-
> > >   drivers/gpu/drm/i915/display/intel_drrs.c     |  4 +++-
> > >   drivers/gpu/drm/i915/display/intel_fbc.c      |  2 +-
> > >   drivers/gpu/drm/i915/display/intel_fbdev.c    |  3 ++-
> > >   drivers/gpu/drm/i915/display/intel_hdcp.c     | 23 +++++++++++--------
> > >   drivers/gpu/drm/i915/display/intel_hotplug.c  | 18 ++++++++++-----
> > >   drivers/gpu/drm/i915/display/intel_opregion.c |  3 ++-
> > >   drivers/gpu/drm/i915/display/intel_pps.c      |  4 +++-
> > >   drivers/gpu/drm/i915/display/intel_psr.c      |  8 ++++---
> > >   .../drm/i915/gt/intel_execlists_submission.c  |  5 ++--
> > >   .../gpu/drm/i915/gt/intel_gt_buffer_pool.c    | 10 ++++----
> > >   drivers/gpu/drm/i915/gt/intel_gt_irq.c        |  2 +-
> > >   drivers/gpu/drm/i915/gt/intel_gt_requests.c   | 10 ++++----
> > >   drivers/gpu/drm/i915/gt/intel_reset.c         |  2 +-
> > >   drivers/gpu/drm/i915/gt/intel_rps.c           | 20 ++++++++--------
> > >   drivers/gpu/drm/i915/gt/selftest_engine_cs.c  |  2 +-
> > >   drivers/gpu/drm/i915/i915_driver.c            | 11 +++++++++
> > >   drivers/gpu/drm/i915/i915_drv.h               |  9 +++++++-
> > >   drivers/gpu/drm/i915/i915_request.c           |  2 +-
> > >   drivers/gpu/drm/i915/intel_wakeref.c          |  2 +-
> > >   24 files changed, 99 insertions(+), 55 deletions(-)
> > 
> > I'll take a look at the gt/ parts only since display experts need to 
> > okay the point Daniel raise anyway.
> 
> There's a bunch of lockdep failures in BAT. Are they possible related to
> switching to unordered wq?

I have not checked those results yet, because I'll send a new version
soon anyway.  I tested this before, but with the dedicated wakeref
workqueues, and it all passed cleanly.  So it _may_ be related to that
change.  I'll check it.

--
Cheers,
Luca.




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