Re: [PATCH 17/19] fs: Reduce inode I_FREEING and factor inode disposal

Nick Piggin
2010-10-19T03:54:21Z

On Mon, Oct 18, 2010 at 02:27:02PM -0700, Sage Weil wrote:
> I took a look at this code and was able to remove the i_lock ->
> dcache_lock nesting. To be honest, I'm not sure why I did it that way in
> the first place. The only point (now) where i_lock is used/needed is
> while checking the ceph inode flags, and that's done without holding
> dcache_lock (presumably soon to be d_lock).

Great, it was a bit nasty of ceph to add that in without documenting
it, but I guess it got past reviewers so it was up to them to ack it
or point it out.

I think we should probably enforce a rule that dcache_lock not nest
inside i_lock :) Anybody wanting to do that in future had better have
a really good reason.

> The patch is 622386be in the for-next branch of
> git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client.git
>
> Anyway, hope this helps!

It does, thanks.