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Subject[PATCH 3/3] ensure unique i_ino in filesystems without permanent inode numbers (pipefs)
pipefs is a rather busy filesystem and so is a good place to start to make
sure we flush out any performance problems

Signed-off-by: Jeff Layton <>

diff --git a/fs/pipe.c b/fs/pipe.c
index b1626f2..d74ae65 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -845,6 +845,9 @@ static struct inode * get_pipe_inode(voi
if (!inode)
goto fail_inode;

+ if (iunique_register(inode, 0))
+ goto fail_iput;
pipe = alloc_pipe_info(inode);
if (!pipe)
goto fail_iput;
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