This is a note to let you know that I've just added the patch titled orangefs: Use RCU for destroy_inode to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: orangefs-use-rcu-for-destroy_inode.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 0695d7dc1d9f19b82ec2cae24856bddce278cfe6 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Date: Fri, 24 Feb 2017 16:43:36 +0100 Subject: orangefs: Use RCU for destroy_inode From: Peter Zijlstra <peterz@xxxxxxxxxxxxx> commit 0695d7dc1d9f19b82ec2cae24856bddce278cfe6 upstream. freeing of inodes must be RCU-delayed on all filesystems Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/orangefs/super.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) --- a/fs/orangefs/super.c +++ b/fs/orangefs/super.c @@ -115,6 +115,13 @@ static struct inode *orangefs_alloc_inod return &orangefs_inode->vfs_inode; } +static void orangefs_i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); + kmem_cache_free(orangefs_inode_cache, orangefs_inode); +} + static void orangefs_destroy_inode(struct inode *inode) { struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); @@ -123,7 +130,7 @@ static void orangefs_destroy_inode(struc "%s: deallocated %p destroying inode %pU\n", __func__, orangefs_inode, get_khandle_from_ino(inode)); - kmem_cache_free(orangefs_inode_cache, orangefs_inode); + call_rcu(&inode->i_rcu, orangefs_i_callback); } /* Patches currently in stable-queue which might be from peterz@xxxxxxxxxxxxx are queue-4.9/orangefs-use-rcu-for-destroy_inode.patch