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Date: Sat, 11 Jul 2015 23:10:04 -0700
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Subject: Re: btrfs full, but not full, can't rebalance
From: Rich Rauenzahn <rrauenza@gmail.com>
To: Chris Murphy <lists@colorremedies.com>
Cc: Btrfs BTRFS <linux-btrfs@vger.kernel.org>
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Just a final note -- I'm finally back in person with the CentOS 7 server and so
booted it to the latest kernel-ml from elrepo.  It is a 4.1 kernel.

But while still remote with the older 3.10 kernel, I also tried doing
a 'mount -oremount,clear_cache /'

I can't swear it helped, but things did seem to get better
afterwards... so it may be worth a try for anyone reading this thread
with a similar problem later.  (Unless someone can definitively say
that clear_cache doesn't work with -oremount.)

Rich