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| author | Mark Fasheh <mark.fasheh@oracle.com> | 2008-01-23 16:54:48 -0800 |
|---|---|---|
| committer | Mark Fasheh <mark.fasheh@oracle.com> | 2008-01-25 15:05:48 -0800 |
| commit | 7ec373cf33533af6c50828a62f6b305c2d7fa931 (patch) | |
| tree | e6f9f829f9d66658e57b5700935dca38f798cbf8 /fs/ocfs2 | |
| parent | 116ba5d5ea1a5789a8c14b1087014007cada363b (diff) | |
| download | lwn-7ec373cf33533af6c50828a62f6b305c2d7fa931.tar.gz lwn-7ec373cf33533af6c50828a62f6b305c2d7fa931.zip | |
ocfs2: document access rules for blocked_lock_list
ocfs2_super->blocked_lock_list and ocfs2_super->blocked_lock_count have some
usage restrictions which aren't immediately obvious to anyone reading the
code. It's a good idea to document this so that we avoid making costly
mistakes in the future.
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Diffstat (limited to 'fs/ocfs2')
| -rw-r--r-- | fs/ocfs2/ocfs2.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h index 22e334d125d0..d08480580470 100644 --- a/fs/ocfs2/ocfs2.h +++ b/fs/ocfs2/ocfs2.h @@ -262,6 +262,12 @@ struct ocfs2_super unsigned long dc_wake_sequence; unsigned long dc_work_sequence; + /* + * Any thread can add locks to the list, but the downconvert + * thread is the only one allowed to remove locks. Any change + * to this rule requires updating + * ocfs2_downconvert_thread_do_work(). + */ struct list_head blocked_lock_list; unsigned long blocked_lock_count; |