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-rw-r--r--src/rabbit_disk_queue.erl4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/rabbit_disk_queue.erl b/src/rabbit_disk_queue.erl
index 7e2d8d12bf..f586713d62 100644
--- a/src/rabbit_disk_queue.erl
+++ b/src/rabbit_disk_queue.erl
@@ -168,7 +168,9 @@
%% above B (i.e. truncate to the limit of the good contiguous region
%% at the start of the file), then write C and D on top and then write
%% E, F and G from the right file on top. Thus contiguous blocks of
-%% good data at the bottom of files are not rewritten.
+%% good data at the bottom of files are not rewritten (yes, this is
+%% the data the size of which is tracked by the ContiguousTop
+%% variable. Judicious use of a mirror is required).
%%
%% --------- --------- ---------
%% | X | | G | | G |