linux-kernel - Re: [PATCH 1/9] task_struct: add PF

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Message-Id: <1252009549.2425.42.camel@dhcp231-106.rdu.redhat.com>
Date:	Thu, 03 Sep 2009 16:25:49 -0400
From:	Eric Paris <eparis@...hat.com>
To:	unlisted-recipients:; (no To-header on input)
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	netdev@...r.kernel.org, davem@...emloft.net,
	viro@...iv.linux.org.uk, alan@...ux.intel.com, hch@...radead.org
Subject: Re: [PATCH 1/9] task_struct: add PF_NONOTIFY for fanotify to use

> On Fri, Aug 28, 2009 at 02:55:42PM -0400, Eric Paris (eparis@...hat.com) wrote:
> > Since fanotify opens file descriptors inside the kernel for it's listeners
> > it needs a way to make sure that 2 fanotify listeners, both which listen to
> > open events do not continuously see each others open events (and get into a
> > livelock reporting on each other's activity).  This fix is to create a new
> > tast_struct flags called PF_NONOTIFY.  If this flag is set in a task no
> > fanotify events will be generated for that task.   fanotify will set the
> > flag before and open call and will clear it immediately after.

So this patch isn't actually needed, I thought the fsnotify_open() call
was deeper than it is.  I'm going to drop this particular patch.

Can I take silence on the list as a lack of disagreement?  I'd like to
start putting these into linux-next starting tomorrow.  Obviously I'd
like to see the networking definitions approved and taken by davem, I'd
like to see the FMODE_ change approved and taken by viro, but if you two
would like me to push it directly I'd be happy to.

Davem, maybe you'd rather my af_fanotify was somewhere inside net/
instead of in fs/notify/fanotify?  I'd love to get some review here, but
noone onlist is excited enough to step up.  (I have numerous people who
have privately claimed they intend to use this stuff, so i promise it
won't be dead code.)

I'm ready to start committing and adding features, anyone telling me no?

-Eric

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