The patch titled
autofs4: need to invalidate children on tree mount expire
has been added to the -mm tree. Its filename is
autofs4-need-to-invalidate-children-on-tree-mount-expire.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: autofs4: need to invalidate children on tree mount expire
From: Ian Kent <raven@xxxxxxxxxx>
I've found a case where invalid dentrys in a mount tree, waiting to be
cleaned up by d_invalidate, prevent the expected expire.
In this case dentrys created during a lookup for which a mount fails or has
no entry in the mount map contribute to the d_count of the parent dentry.
These dentrys may not be invalidated prior to comparing the interanl usage
count of valid autofs dentrys against the dentry d_count which makes a
mount tree appear busy so it doesn't expire.
Signed-off-by: Ian Kent <raven@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
fs/autofs4/expire.c | 6 ++++++
1 file changed, 6 insertions(+)
diff -puN fs/autofs4/expire.c~autofs4-need-to-invalidate-children-on-tree-mount-expire fs/autofs4/expire.c
--- a/fs/autofs4/expire.c~autofs4-need-to-invalidate-children-on-tree-mount-expire
+++ a/fs/autofs4/expire.c
@@ -174,6 +174,12 @@ static int autofs4_tree_busy(struct vfsm
struct autofs_info *ino = autofs4_dentry_ino(p);
unsigned int ino_count = atomic_read(&ino->count);
+ /*
+ * Clean stale dentries below that have not been
+ * invalidated after a mount fail during lookup
+ */
+ d_invalidate(p);
+
/* allow for dget above and top is already dgot */
if (p == top)
ino_count += 2;
_
Patches currently in -mm which might be from raven@xxxxxxxxxx are
autofs4-need-to-invalidate-children-on-tree-mount-expire.patch
fs-use-list_move.patch
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