[PATCH 2/2] introduction: clarify what is separated from what

["Michael S. Tsirkin" <mst@redhat.com>]

it's a bit vague: says descriptors where it means
indices and input/output where it means
device to driver/driver to device, but
this seems good for brevity.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 introduction.tex | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/introduction.tex b/introduction.tex
index b93934f..cf2fdac 100644
--- a/introduction.tex
+++ b/introduction.tex
@@ -13,7 +13,8 @@ inter-guest communication) requires copying.
 }
 
   Efficient: Virtio devices consist of rings of descriptors
-  for both input and output, which are neatly separated to avoid cache
+  for both input and output. Input rings are are neatly separated
+  from output rings to avoid cache
   effects from both driver and device writing to the same cache
   lines.
 
-- 
MST