Re: [PATCH 3/7] drm/i915: Cache ringbuffer GTT address

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On 11/01/16 14:31, Chris Wilson wrote:
On Mon, Jan 11, 2016 at 02:08:37PM +0000, Tvrtko Ursulin wrote:
From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>

Purpose is to avoid calling i915_gem_obj_ggtt_offset from the
interrupt context without the big lock held.

No. Tracking the pinned VMA has none of these problems.

This patch has problems which VMA tracking does not? I think address is simpler for time being and good enough. It is a subset of the VMA and the lifetime is the same.

Regards,

Tvrtko
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