Hi,
here are my comments, after first review round, mostly on code itself,
not the functionality/quality of the allocator (although after this
patch the allocator code looks quite straightforward a better to read
and understand).
Reviewing the patch directly does not work, Arne's advice was to
In a multi device setup, the chunk allocator currently always allocates
chunks on the devices in the same order. This leads to a very uneven
distribution, especially with RAID1 or RAID10 and an uneven number of
devices.
This patch always sorts the devices before allocating, and allocates the
