[PATCH 1/2] introduction: clarify rings do both input and output (not either/or)

Suggested by Rusty.  Signed-off-by: Michael S. Tsirkin <> ---  introduction.tex
2 +-  1 file changed, 1 insertion(+), 1 deletion(-)  diff --git a/introduction.tex b/introduction.tex index 221e24e..b93934f 100644 --- a/introduction.tex +++ b/introduction.tex @@ -13,7 +13,7 @@ inter-guest communication) requires copying.  }
Efficient: Virtio devices consist of rings of descriptors -  for input and output, which are neatly separated to avoid cache +  for both input and output, which are neatly separated to avoid cache
effects from both driver and device writing to the same cache
lines.

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MST