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-rw-r--r--Documentation/filesystems/proc.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index 2cd920f92e5..2a99116edc4 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -2374,8 +2374,14 @@ possible optional fields are:
shared:X mount is shared in peer group X
master:X mount is slave to peer group X
+propagate_from:X mount is slave and receives propagation from peer group X (*)
unbindable mount is unbindable
+(*) X is the closest dominant peer group under the process's root. If
+X is the immediate master of the mount, or if there's no dominant peer
+group under the same root, then only the "master:X" field is present
+and not the "propagate_from:X" field.
+
For more information on mount propagation see:
Documentation/filesystems/sharedsubtree.txt