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| author | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:49:50 +1100 |
|---|---|---|
| committer | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:50:26 +1100 |
| commit | ff0c7d15f9787b7e8c601533c015295cc68329f8 (patch) | |
| tree | e3db53950b8ed78e542ab35a3cd3a6eaee26eccd /fs | |
| parent | fa0d7e3de6d6fc5004ad9dea0dd6b286af8f03e9 (diff) | |
| download | linux-ff0c7d15f9787b7e8c601533c015295cc68329f8.tar.gz linux-ff0c7d15f9787b7e8c601533c015295cc68329f8.tar.bz2 linux-ff0c7d15f9787b7e8c601533c015295cc68329f8.zip | |
fs: avoid inode RCU freeing for pseudo fs
Pseudo filesystems that don't put inode on RCU list or reachable by
rcu-walk dentries do not need to RCU free their inodes.
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/inode.c | 6 | ||||
| -rw-r--r-- | fs/pipe.c | 6 |
2 files changed, 11 insertions, 1 deletions
diff --git a/fs/inode.c b/fs/inode.c index 6751dfe8cc06..da85e56378f3 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -257,6 +257,12 @@ static struct inode *alloc_inode(struct super_block *sb) return inode; } +void free_inode_nonrcu(struct inode *inode) +{ + kmem_cache_free(inode_cachep, inode); +} +EXPORT_SYMBOL(free_inode_nonrcu); + void __destroy_inode(struct inode *inode) { BUG_ON(inode_has_buffers(inode)); diff --git a/fs/pipe.c b/fs/pipe.c index 04629f36e397..ae3592dcc88c 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -1253,6 +1253,10 @@ out: return ret; } +static const struct super_operations pipefs_ops = { + .destroy_inode = free_inode_nonrcu, +}; + /* * pipefs should _never_ be mounted by userland - too much of security hassle, * no real gain from having the whole whorehouse mounted. So we don't need @@ -1262,7 +1266,7 @@ out: static struct dentry *pipefs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { - return mount_pseudo(fs_type, "pipe:", NULL, PIPEFS_MAGIC); + return mount_pseudo(fs_type, "pipe:", &pipefs_ops, PIPEFS_MAGIC); } static struct file_system_type pipe_fs_type = { |