linux-kernel - Re: [Pv-drivers] [PATCH 05/12] VMCI: event handling implementation.

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Message-ID: <20121030050152.GE32055@dtor-ws.eng.vmware.com>
Date:	Mon, 29 Oct 2012 22:01:52 -0700
From:	Dmitry Torokhov <dtor@...are.com>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	George Zhang <georgezhang@...are.com>, pv-drivers@...are.com,
	linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org
Subject: Re: [Pv-drivers] [PATCH 05/12] VMCI: event handling implementation.

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
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