linux-kernel - Re: [PATCH 3/3] eventfd: add internal reference counting to fix notifier race conditions

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Date:	Tue, 23 Jun 2009 18:04:15 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Davide Libenzi <davidel@...ilserver.org>
Cc:	Gregory Haskins <gregory.haskins@...il.com>,
	Gregory Haskins <ghaskins@...ell.com>, kvm@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	avi@...hat.com, paulmck@...ux.vnet.ibm.com,
	Ingo Molnar <mingo@...e.hu>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [PATCH 3/3] eventfd: add internal reference counting to fix
	notifier race conditions

On Tue, Jun 23, 2009 at 07:35:00AM -0700, Davide Libenzi wrote:
> On Tue, 23 Jun 2009, Gregory Haskins wrote:
> 
> > Davide Libenzi wrote:
> > > On Mon, 22 Jun 2009, Gregory Haskins wrote:
> > >
> > >   
> > >> To be honest, I am not sure.  I would guess its not a *huge* deal,
> > >> though it was obviously enough of a concern to at least discuss it.  I
> > >> can definitely say that I think the other issues which are being fixed
> > >> are substantially more important.
> > >>     
> > >
> > > Ok then, will repost the revised patch later today.
> > >   
> > 
> > Ok sounds good.  I did have a chance to take a closer look at your
> > proposal for the key data, and I think it makes a lot of sense.  Do you
> > see it as a problem if we defer adding that?  Or should we try to add
> > that notion now?
> 
> That would need to go eventually via mainline, after some discussion. But 
> yes, I believe that using the "key" as simple bitmask is a little 
> restrictive.
> 
> 
> - Davide

I agree.

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