linux-kernel - Re: [PATCH 3/4] fs: add fput

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Message-ID: <20150914163954.GT22011@ZenIV.linux.org.uk>
Date:	Mon, 14 Sep 2015 17:39:54 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Jeff Layton <jlayton@...chiereds.net>
Cc:	bfields@...ldses.org, linux-nfs@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] fs: add fput_queue

On Mon, Sep 14, 2015 at 10:19:18AM -0400, Jeff Layton wrote:
> > > + * borrow the infrastructure used by kthreads, and the task can then just
> > > + * called flush_delayed_fput to ensure that the final fput has completed.
> > 
> > Are you sure that it's not a typo?
> 
> I don't think so, but it could be clearer. Something like this maybe?
> 
>      "then we can't queue it via task_work_add."

Huh?

task_work_add() callbacks *will* run before we return to userland
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