Re: [PATCH 0/3] Fixes for vfs-scale and vfs-automount

Al Viro
2011-02-24T19:10:23Z

On Thu, Feb 24, 2011 at 06:07:33PM +0800, Ian Kent wrote:

> Yes, that's a problem.
>
> Previously the dcache_lock would have blocked on the dput() ... mmm, I'd
> missed that so far, although Nick didn't talk with me about his changes
> very much at all and I didn't pay enough attention to his patch series
> along the way, oops!

Actually, dcache_lock blocks only the _final_ dput(). I.e. one that has
refcount going to 0. Not the case here, so that's a problem without
RCU stuff as well.