Make sure all changes to md/sync_action are notified.

[firefly-linux-kernel-4.4.55.git] / Documentation / md.txt

diff --git a/Documentation/md.txt b/Documentation/md.txt
index dca97ba4944a9d3fe445b23f0d6940e21b2f2f38..c05bfb55659edd3aed5fa1976f4452c1135b67dc 100644 (file)
--- a/Documentation/md.txt
+++ b/Documentation/md.txt
@@ -386,6 +386,12 @@ also have
        'check' and 'repair' will start the appropriate process
            providing the current state is 'idle'.
 
+      This file responds to select/poll.  Any important change in the value
+      triggers a poll event.  Sometimes the value will briefly be
+      "recover" if a recovery seems to be needed, but cannot be
+      achieved. In that case, the transition to "recover" isn't
+      notified, but the transition away is.
+
    mismatch_count
       When performing 'check' and 'repair', and possibly when
       performing 'resync', md will count the number of errors that are