From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Eugeni Dodonov <eugeni@dodonov.net>
Cc: Keith Packard <keithp@keithp.com>,
intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org
Subject: Re: [PATCH] drm/i915: By default, enable RC6 on IVB and SNB when reasonable
Date: Tue, 22 Nov 2011 20:51:45 +0000 [thread overview]
Message-ID: <20111122205145.GA7206@srcf.ucam.org> (raw)
In-Reply-To: <CAC7Lmnts+QwZ2XTvbTQa=aa3XO5_Sna0vk3KHWJJ6oi6+D5BXw@mail.gmail.com>
On Tue, Nov 22, 2011 at 06:46:21PM -0200, Eugeni Dodonov wrote:
> On Tue, Nov 22, 2011 at 18:15, Matthew Garrett <mjg@redhat.com> wrote:
>
> > On Fri, Nov 18, 2011 at 10:41:29PM -0800, Keith Packard wrote:
> >
> > > + /*
> > > + * Only enable RC6 if all dma remapping is disabled, or if
> > > + * there's no iommu present in the machine.
> > > + */
> > > + if (INTEL_INFO(dev)->gen == 6)
> > > + return no_iommu || dmar_disabled;
> >
> > So the user has to choose between 5W of power saving or having dmar? And
> > we default to giving them dmar?
>
>
> From the latest investigations, it is either this, or random gpu hangs and
> crashes when both are enabled :(.
So blacklist dmar on sandybridge. The power saving is going to be more
important for most users.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2011-11-22 20:51 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1322526298-2746-1-git-send-email-eugeni.dodonov@intel.com>
2011-11-19 6:41 ` [PATCH] drm/i915: By default, enable RC6 on IVB and SNB when reasonable Keith Packard
2011-11-19 7:37 ` [Intel-gfx] " Kenneth Graunke
2011-11-19 9:25 ` Eugeni Dodonov
2011-11-19 18:32 ` Keith Packard
2011-11-20 21:19 ` Eugeni Dodonov
2011-11-22 20:15 ` Matthew Garrett
[not found] ` <CAC7Lmnts+QwZ2XTvbTQa=aa3XO5_Sna0vk3KHWJJ6oi6+D5BXw@mail.gmail.com>
2011-11-22 20:51 ` Matthew Garrett [this message]
2011-11-23 3:31 ` Keith Packard
2011-11-23 10:26 ` Daniel Vetter
2011-11-23 14:01 ` David Woodhouse
2011-11-23 14:39 ` Daniel Vetter
2011-11-23 15:03 ` David Woodhouse
2011-11-23 15:31 ` Daniel Vetter
2011-11-23 15:36 ` David Woodhouse
2011-11-23 15:46 ` Daniel Vetter
2011-11-23 15:41 ` Daniel Vetter
2011-11-23 15:43 ` David Woodhouse
2011-11-23 20:35 ` Daniel Vetter
2011-11-23 18:42 ` [PATCH] iommu: export no_iommu and dmar_disabled symbols Eugeni Dodonov
2011-11-23 20:36 ` [Intel-gfx] " David Woodhouse
2011-11-23 20:48 ` Keith Packard
2011-12-09 23:53 ` drm/i915: Enabling RC6 where possible Keith Packard
2011-12-09 23:53 ` [PATCH 1/2] iommu: Export intel_iommu_enabled to signal when iommu is in use Keith Packard
2011-12-09 23:53 ` [PATCH 2/2] drm/i915: By default, enable RC6 on IVB and SNB when reasonable Keith Packard
2011-12-13 3:45 ` Matthew Garrett
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