From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri, 4 Oct 2013 08:58:46 +0000 (+0100)
Subject: drm/i915: Call io_schedule() whilst whilsting for the GPU
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=5035c275af811b93dec5df6d064e0b2319cf59c8;p=linux-beck.git

drm/i915: Call io_schedule() whilst whilsting for the GPU

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@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 13c885d66383..7dc9c9c7778c 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1082,7 +1082,7 @@ static int __wait_seqno(struct intel_ring_buffer *ring, u32 seqno,
 			mod_timer(&timer, expire);
 		}
 
-		schedule();
+		io_schedule();
 
 		if (timeout)
 			timeout_jiffies = expire - jiffies;