commit a9c9bf68276c36898e23db770a65bd9b75bfac58
author Arne Jansen <sensille@gmx.net> Tue Apr 12 11:01:20 2011 +0200
committer Arne Jansen <sensille@gmx.net> Fri May 13 15:36:12 2011 +0200
tree ba18ea840825d8c2bc6199fda17bb44f52fb85c4
parent bcd53741cc2af4342ac3ff6983bddc4a1b63b9b4

btrfs: heed alloc_start

currently alloc_start is disregarded if the requested
chunk size is bigger than (device size - alloc_start),
but smaller than the device size.
The only situation where I see this could have made sense
was when a chunk equal the size of the device has been
requested. This was possible as the allocator failed to
take alloc_start into account when calculating the request
chunk size. As this gets fixed by this patch, the workaround
is not necessary anymore.