On Wed, Aug 10, 2011 at 12:15:47PM +0100, Mel Gorman wrote:

quoted

The right fix is to simply remove that fallback, possibly in combination
with implementating real migration support for btrfs.

Removing the fallback entirely is overkill as proper migration support
is not going to get 100% coverage

It seems like btrfs is indeed the only important one missing.

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