From 207a232ccac0a8cb79d304bd17298dbc96e2e082 Mon Sep 17 00:00:00 2001
From: Arne Jansen <sensille@gmx.net>
Date: Sat, 25 Feb 2012 09:09:47 +0100
Subject: [PATCH] btrfs: don't add both copies of DUP to reada extent tree

Normally when there are 2 copies of a block, we add both to the
reada extent tree and prefetch only the one that is easier to reach.
This way we can better utilize multiple devices.
In case of DUP this makes no sense as both copies reside on the
same device.

Signed-off-by: Arne Jansen <sensille@gmx.net>
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Reading git-format-patch failed