[Ocfs2-devel] [PATCH -v2 1/3] jbd2: Use atomic variables to avoid taking t_handle_lock in jbd2_journal_stop

[Ted Ts'o]

On Mon, Aug 09, 2010 at 09:45:55PM +0200, Jan Kara wrote:
>   Ah, OK. You're right. I just thought we eventually want to remove the
> lock but you're right that currently the code is fine. Sorry for the noise.

I would love to get rid of the j_state_lock, but looking through the
code, I couldn't figure out how to do this safely.  Hence my
conversion of the j_state_lock to a rwlock_t, with the downside of
this causing more cache line bounces.  If someone can suggest a way to
drop needing a global spinlock (whether it is an exclusive or rwlock)
in start_this_handle(), I'd love to hear them.

   			    	    	 - Ted