From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dmitry Torokhov <dtor@vmware.com>
Subject: Re: [Pv-drivers] [PATCH 05/12] VMCI: event handling implementation.
Date: Mon, 29 Oct 2012 22:01:52 -0700
Message-ID: <20121030050152.GE32055@dtor-ws.eng.vmware.com>
References: <20121030005923.17788.21797.stgit@promb-2n-dhcp175.eng.vmware.com>
	<20121030010420.17788.59187.stgit@promb-2n-dhcp175.eng.vmware.com>
	<20121030022605.GG1920@kroah.com>
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To: Greg KH <gregkh@linuxfoundation.org>
Cc: pv-drivers@vmware.com, linux-kernel@vger.kernel.org, George Zhang <georgezhang@vmware.com>, virtualization@lists.linux-foundation.org
List-Id: virtualization@lists.linuxfoundation.org

On Mon, Oct 29, 2012 at 07:26:05PM -0700, Greg KH wrote:
> On Mon, Oct 29, 2012 at 06:04:27PM -0700, George Zhang wrote:
> > +static void event_signal_destroy(struct kref *kref)
> > +{
> > +	struct vmci_subscription *entry =
> > +			container_of(kref, struct vmci_subscription, kref);
> > +
> > +	complete(&entry->done);
> > +}
> 
> Didn't you just leak memory here?  What frees the structure up?

event_unregister_subscription() waits for that completion and frees the
structure. We want event_unregister_subscription() to wait until all
fired callbacks completed before unregister is complete.

Thanks,
Dmitry