On Tue, Nov 22, 2011 at 07:31:34PM -0800, Keith Packard wrote:
On Tue, 22 Nov 2011 20:15:31 +, Matthew Garrett m...@redhat.com wrote:
So the user has to choose between 5W of power saving or having dmar? And
we default to giving them dmar? I think that's going to come as a
surprise
On Wed, 2011-11-23 at 11:26 +0100, Daniel Vetter wrote:
On Tue, Nov 22, 2011 at 07:31:34PM -0800, Keith Packard wrote:
On Tue, 22 Nov 2011 20:15:31 +, Matthew Garrett m...@redhat.com wrote:
So the user has to choose between 5W of power saving or having dmar? And
we default to
On Wed, Nov 23, 2011 at 02:01:54PM +, David Woodhouse wrote:
On Wed, 2011-11-23 at 11:26 +0100, Daniel Vetter wrote:
On Tue, Nov 22, 2011 at 07:31:34PM -0800, Keith Packard wrote:
On Tue, 22 Nov 2011 20:15:31 +, Matthew Garrett m...@redhat.com
wrote:
So the user has to
On Wed, 2011-11-23 at 15:39 +0100, Daniel Vetter wrote:
At least for the dmar+gfx+semaphores hang I can reproduce, just disabling
dmar with intel_iommu=igfx_off is not good enough and iirc the same holds
for the dmar+rc6 hangs reported.
Um... let me restate that for clarity (and partly for
On Wed, Nov 23, 2011 at 03:03:43PM +, David Woodhouse wrote:
On Wed, 2011-11-23 at 15:39 +0100, Daniel Vetter wrote:
At least for the dmar+gfx+semaphores hang I can reproduce, just disabling
dmar with intel_iommu=igfx_off is not good enough and iirc the same holds
for the dmar+rc6 hangs
On Wed, 2011-11-23 at 16:31 +0100, Daniel Vetter wrote:
Things I've tried that don't work around the issue:
- Disable dmar for the igfx with intel_iommu=igfx_off
- Apply the ilk workaround (i.e. synchronous dmar tlb flushes + gpu
idling while flushing).
Well, the ILK workaround was only
On Wed, Nov 23, 2011 at 03:03:43PM +, David Woodhouse wrote:
On Wed, 2011-11-23 at 15:39 +0100, Daniel Vetter wrote:
At least for the dmar+gfx+semaphores hang I can reproduce, just disabling
dmar with intel_iommu=igfx_off is not good enough and iirc the same holds
for the dmar+rc6 hangs
On Wed, 2011-11-23 at 16:41 +0100, Daniel Vetter wrote:
Hm, that comment confuses me a bit. I've always thought that igfx_off only
instantiates a identity mapping and leaves the dmar unit on. Is that
wrong?
It's completely off. If a DMAR unit has *only* graphics devices behind
it (as the one
On Wed, Nov 23, 2011 at 04:31:54PM +0100, Daniel Vetter wrote:
- Wait 2 minutes for the stuck-in-atomic detection logic to kick in and
grab the backtrace over netconsole. Notice that the kernel is stuck
trying to flush the dmar tlb cache (that's how I managed to track it
down to a dmar
On Wed, Nov 23, 2011 at 03:43:05PM +, David Woodhouse wrote:
On Wed, 2011-11-23 at 16:41 +0100, Daniel Vetter wrote:
Hm, that comment confuses me a bit. I've always thought that igfx_off only
instantiates a identity mapping and leaves the dmar unit on. Is that
wrong?
It's completely
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
On Tue, Nov 22, 2011 at 18:15, Matthew Garrett m...@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
On Tue, Nov 22, 2011 at 06:46:21PM -0200, Eugeni Dodonov wrote:
On Tue, Nov 22, 2011 at 18:15, Matthew Garrett m...@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
+ *
On Tue, 22 Nov 2011 20:15:31 +, Matthew Garrett m...@redhat.com wrote:
So the user has to choose between 5W of power saving or having dmar? And
we default to giving them dmar? I think that's going to come as a
surprise to people.
You'd have to go into the BIOS to turn this on for most
On Sat, Nov 19, 2011 at 04:41, Keith Packard kei...@keithp.com wrote:
RC6 should always work on IVB, and should work on SNB whenever IO
remapping is disabled. Make the default value for the parameter turn
it on in these cases. Setting the value to either 0 or 1 will force
the specified
On Sat, Nov 19, 2011 at 04:41, Keith Packard kei...@keithp.com wrote:
+static bool intel_enable_rc6(struct drm_device *dev)
+{
+ if (i915_enable_rc6 = 0)
+ return i915_enable_rc6;
+ if (INTEL_INFO(dev)-gen = 7)
+ return 1;
+#ifdef CONFIG_INTEL_IOMMU
RC6 should always work on IVB, and should work on SNB whenever IO
remapping is disabled. Make the default value for the parameter turn
it on in these cases. Setting the value to either 0 or 1 will force
the specified behavior.
Signed-off-by: Keith Packard kei...@keithp.com
---
On 11/18/2011 10:41 PM, Keith Packard wrote:
RC6 should always work on IVB, and should work on SNB whenever IO
remapping is disabled. Make the default value for the parameter turn
it on in these cases. Setting the value to either 0 or 1 will force
the specified behavior.
Signed-off-by:
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