On Sun, Feb 22, 2015 at 1:01 PM, Holger Hoffstätte <[email protected]> wrote:
On Mon, 16 Feb 2015 15:18:40 +0000, Holger Hoffstätte wrote:

What works is the very first balance after the mkfs - it successfully changes from the initial default dup to single, but subsequent balances
 don't work. They also don't really fail.

Bisection found that commit 2f0810880f082fa8ba66ab2c33b02e4ff9770a5e [1]
 in the integration tree is the cause:

   btrfs: delete chunk allocation attemp when setting block group ro

 Reverting/omitting this patch lets me rebalance/convert at will.

Just for the list archives: Chris mailed me privately that they could
reproduce the problem and will provide a fix post-3.20-rc1
(since that commit already went in with the merge window).

Apparently reply-to-all is harder than it looks. Thanks for forwarding this along.

-chris



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