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Message-ID: <20111123154128.GG3864@phenom.ffwll.local> Date: Wed, 23 Nov 2011 16:41:28 +0100 From: Daniel Vetter <daniel@...ll.ch> To: David Woodhouse <dwmw2@...radead.org> Cc: Daniel Vetter <daniel@...ll.ch>, rajesh.sankaran@...el.com, Keith Packard <keithp@...thp.com>, Matthew Garrett <mjg@...hat.com>, intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org Subject: Re: [PATCH] drm/i915: By default, enable RC6 on IVB and SNB when reasonable On Wed, Nov 23, 2011 at 03:03:43PM +0000, 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 reported. > > Um... let me restate that for clarity (and partly for Rajesh's benefit). > > The DMAR associated with the integrated graphics is *disabled*. > Turned off. Not active. Ever. 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? -Daniel -- Daniel Vetter Mail: daniel@...ll.ch Mobile: +41 (0)79 365 57 48 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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