[Intel-gfx] [PATCH 4/7] drm/i915: Cache LRC state page in the context

Chris Wilson chris at chris-wilson.co.uk
Mon Jan 11 06:29:55 PST 2016

On Mon, Jan 11, 2016 at 02:08:38PM +0000, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> LRC lifetime is well defined so we can cache the page pointing
> to the object backing store in the context in order to avoid
> walking over the object SG page list from the interrupt context
> without the big lock held.

You can keep kmap around for the pinned lifetime of the context.

Chris Wilson, Intel Open Source Technology Centre

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