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

From: Al Viro
Date: Thu Feb 24 2011 - 14:10:27 EST

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.
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