[Intel-gfx] [PATCH] drm/i915: Call io_schedule() whilst whilsting for the GPU

Chris Wilson chris at chris-wilson.co.uk
Fri Oct 4 10:58:46 CEST 2013

Since we are waiting upon IO completion, inform the kernel through use
of the io_schedule() call rather than the regular schedule(). This
should allow the kernel to make better decisions regarding scheduling
and power management.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
 drivers/gpu/drm/i915/i915_gem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 825d8ea35e08..6f2db61fc65b 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1179,7 +1179,7 @@ static int __wait_seqno(struct intel_ring_buffer *ring, u32 seqno,
 			mod_timer(&timer, expire);
-		schedule();
+		io_schedule();
 		if (timeout)
 			timeout_jiffies = expire - jiffies;

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