Initialize for btrfsmaintenance

0001-README-document-impact-of-balance-quota-groups.patch

@@ -0,0 +1,37 @@
+From 3e8ae32c961f0a3a6ba32881e88a49d5cbf656cd Mon Sep 17 00:00:00 2001
+From: Jeff Mahoney <jeffm@suse.com>
+Date: Fri, 11 Jan 2019 09:57:48 -0500
+Subject: README: document impact of balance + quota groups
+References: fate#325529 jsc#SLE-3188
+
+The combination of balance and quota groups as the number of references
+to extents rises (either via snapshots, dedupe, or reflink copies) can
+be extreme.
+
+The file system performs quota group accounting for every extent relocated
+and the result can be the appearance of stalled system as the
+transaction commit can take a very long time.
+
+Signed-off-by: Jeff Mahoney <jeffm@suse.com>
+---
+ README.md | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/README.md b/README.md
+index 07a8104..d59f3d6 100644
+--- a/README.md
++++ b/README.md
+@@ -66,6 +66,10 @@ the same set of blocks is affected.
+ 
+ The balance command uses filters to do the work in smaller batches.
+ 
++The impact with quota groups enabled can be extreme.  The balance operation
++performs quota group accounting for every extent being relocated, which can
++have the impact of stalling the file system for an extended period of time.
++
+ __Expected result:__ If possible all the underused chunks are removed, the
+ value of `total` in output of `btrfs fi df /path` should be lower than before.
+ Check the logs.
+-- 
+2.16.4
+