[PATCH 1/6] fs: unify locking semantics for fs freeze / thaw

[Luis Chamberlain]

On Wed, Jun 07, 2023 at 10:01:14PM -0700, Christoph Hellwig wrote:
> On Sun, May 07, 2023 at 06:17:12PM -0700, Luis Chamberlain wrote:
> > Right now freeze_super()  and thaw_super() are called with
> > different locking contexts. To expand on this is messy, so
> > just unify the requirement to require grabbing an active
> > reference and keep the superblock locked.
> > 
> > Suggested-by: Christoph Hellwig <hch at infradead.org>
> > Signed-off-by: Luis Chamberlain <mcgrof at kernel.org>
> 
> Maybe I'm just getting old, but where did I suggest this?

https://lore.kernel.org/all/20210420120335.GA3604224@infradead.org/

"I don't think we need both variants, just move the locking and s_active
acquisition out of free_super.  Same for the thaw side."

> That being said, holding an active reference over any operation is a
> good thing.  As Jan said it can be done way simpler than this, though.

Great.


  Luis