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| author | Jesper Dangaard Brouer <hawk@comx.dk> | 2009-07-05 22:29:27 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2009-07-05 22:29:27 -0400 |
| commit | 3e03f9ca6a2599db1823bb0ea24e0845219a0e69 (patch) | |
| tree | 5eddfee10fa2ba535441ad87b9382c8d686b5e07 /fs/ext4 | |
| parent | 726447d803802cd0be8f62d17c4a34421781b938 (diff) | |
| download | blackbird-op-linux-3e03f9ca6a2599db1823bb0ea24e0845219a0e69.tar.gz blackbird-op-linux-3e03f9ca6a2599db1823bb0ea24e0845219a0e69.zip | |
ext4: Use rcu_barrier() on module unload.
The ext4 module uses rcu_call() thus it should use rcu_barrier()on
module unload.
The kmem cache ext4_pspace_cachep is sometimes free'ed using
call_rcu() callbacks. Thus, we must wait for completion of call_rcu()
before doing kmem_cache_destroy().
Signed-off-by: Jesper Dangaard Brouer <hawk@comx.dk>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/mballoc.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 4a45efabb203..2fcaf286f1de 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -2909,7 +2909,11 @@ int __init init_ext4_mballoc(void) void exit_ext4_mballoc(void) { - /* XXX: synchronize_rcu(); */ + /* + * Wait for completion of call_rcu()'s on ext4_pspace_cachep + * before destroying the slab cache. + */ + rcu_barrier(); kmem_cache_destroy(ext4_pspace_cachep); kmem_cache_destroy(ext4_ac_cachep); kmem_cache_destroy(ext4_free_ext_cachep); |
