From: Dmitry Torokhov <dtor@vmware.com>
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
Subject: Re: [Pv-drivers] [PATCH 05/12] VMCI: event handling implementation.
Date: Tue, 30 Oct 2012 08:59:39 -0700 [thread overview]
Message-ID: <2950075.FZEQUln4vx@dtor-d630.eng.vmware.com> (raw)
In-Reply-To: <20121030155041.GF14167@kroah.com>
On Tuesday, October 30, 2012 08:50:41 AM Greg KH wrote:
> On Mon, Oct 29, 2012 at 10:01:52PM -0700, Dmitry Torokhov wrote:
> > 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.
>
> So all calls to this can just sit and spin waiting for others to clean
> up? Odd, but ok.
Not all as there is logically only one owner of the subscription so
naturally it waits until all notification callbacks are done.
Frankly we have a change that gets rid of delayed ecvent callbacks
and so the refcounting is no longer needed at all.
Thanks,
Dmitry
WARNING: multiple messages have this Message-ID (diff)
From: Dmitry Torokhov <dtor@vmware.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: George Zhang <georgezhang@vmware.com>,
pv-drivers@vmware.com, linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org
Subject: Re: [Pv-drivers] [PATCH 05/12] VMCI: event handling implementation.
Date: Tue, 30 Oct 2012 08:59:39 -0700 [thread overview]
Message-ID: <2950075.FZEQUln4vx@dtor-d630.eng.vmware.com> (raw)
In-Reply-To: <20121030155041.GF14167@kroah.com>
On Tuesday, October 30, 2012 08:50:41 AM Greg KH wrote:
> On Mon, Oct 29, 2012 at 10:01:52PM -0700, Dmitry Torokhov wrote:
> > 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.
>
> So all calls to this can just sit and spin waiting for others to clean
> up? Odd, but ok.
Not all as there is logically only one owner of the subscription so
naturally it waits until all notification callbacks are done.
Frankly we have a change that gets rid of delayed ecvent callbacks
and so the refcounting is no longer needed at all.
Thanks,
Dmitry
next prev parent reply other threads:[~2012-10-30 15:59 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-30 1:03 [PATCH 00/12] VMCI for Linux upstreaming George Zhang
2012-10-30 1:03 ` [PATCH 01/12] VMCI: context implementation George Zhang
2012-10-30 2:07 ` Greg KH
2012-10-30 2:07 ` Greg KH
2012-10-30 2:10 ` Greg KH
2012-10-30 2:10 ` Greg KH
2012-10-30 4:01 ` [Pv-drivers] " Dmitry Torokhov
2012-10-30 4:01 ` Dmitry Torokhov
2012-10-30 15:46 ` Greg KH
2012-10-30 15:46 ` Greg KH
2012-10-30 15:56 ` Dmitry Torokhov
2012-10-30 15:56 ` Dmitry Torokhov
2012-10-30 1:03 ` [PATCH 02/12] VMCI: datagram implementation George Zhang
2012-10-30 1:04 ` [PATCH 03/12] VMCI: doorbell implementation George Zhang
2012-10-30 1:04 ` [PATCH 04/12] VMCI: device driver implementaton George Zhang
2012-10-30 2:21 ` Greg KH
2012-10-30 2:21 ` Greg KH
2012-10-30 2:23 ` Greg KH
2012-10-30 2:23 ` Greg KH
2012-10-30 4:15 ` [Pv-drivers] " Dmitry Torokhov
2012-10-30 4:15 ` Dmitry Torokhov
2012-10-30 15:49 ` Greg KH
2012-10-30 15:49 ` Greg KH
2012-10-30 1:04 ` [PATCH 05/12] VMCI: event handling implementation George Zhang
2012-10-30 2:24 ` Greg KH
2012-10-30 2:24 ` Greg KH
2012-10-30 4:58 ` [Pv-drivers] " Dmitry Torokhov
2012-10-30 4:58 ` Dmitry Torokhov
2012-10-30 15:50 ` Greg KH
2012-10-30 15:50 ` Greg KH
2012-10-30 2:26 ` Greg KH
2012-10-30 2:26 ` Greg KH
2012-10-30 5:01 ` [Pv-drivers] " Dmitry Torokhov
2012-10-30 5:01 ` Dmitry Torokhov
2012-10-30 15:50 ` Greg KH
2012-10-30 15:50 ` Greg KH
2012-10-30 15:59 ` Dmitry Torokhov [this message]
2012-10-30 15:59 ` Dmitry Torokhov
2012-10-30 1:04 ` [PATCH 06/12] VMCI: handle array implementation George Zhang
2012-10-30 1:04 ` [PATCH 07/12] VMCI: queue pairs implementation George Zhang
2012-10-30 1:04 ` [PATCH 08/12] VMCI: resource object implementation George Zhang
2012-10-30 2:29 ` Greg KH
2012-10-30 2:29 ` Greg KH
2012-10-30 5:20 ` [Pv-drivers] " Dmitry Torokhov
2012-10-30 5:20 ` Dmitry Torokhov
2012-10-30 15:51 ` Greg KH
2012-10-30 15:51 ` Greg KH
2012-10-30 16:11 ` Dmitry Torokhov
2012-10-30 16:11 ` Dmitry Torokhov
2012-10-30 2:29 ` Greg KH
2012-10-30 2:29 ` Greg KH
2012-10-30 5:21 ` [Pv-drivers] " Dmitry Torokhov
2012-10-30 5:21 ` Dmitry Torokhov
2012-10-30 1:04 ` George Zhang
2012-10-30 1:05 ` [PATCH 09/12] VMCI: routing implementation George Zhang
2012-10-30 1:05 ` George Zhang
2012-10-30 1:05 ` [PATCH 10/12] VMCI: guest side driver implementation George Zhang
2012-10-30 1:05 ` [PATCH 11/12] VMCI: host " George Zhang
2012-10-30 1:05 ` [PATCH 12/12] VMCI: Some header and config files George Zhang
2012-10-30 2:32 ` Greg KH
2012-10-30 2:32 ` Greg KH
2012-10-30 5:22 ` [Pv-drivers] " Dmitry Torokhov
2012-10-30 5:22 ` Dmitry Torokhov
2012-10-30 2:38 ` Greg KH
2012-10-30 2:38 ` Greg KH
2012-10-30 2:19 ` [PATCH 00/12] VMCI for Linux upstreaming Greg KH
2012-10-30 2:19 ` Greg KH
2012-10-30 4:07 ` [Pv-drivers] " Dmitry Torokhov
2012-10-30 4:07 ` Dmitry Torokhov
2012-10-30 15:48 ` Greg KH
2012-10-30 15:48 ` Greg KH
2012-10-30 16:18 ` Dmitry Torokhov
2012-10-30 16:18 ` Dmitry Torokhov
2012-10-30 16:27 ` Greg KH
2012-10-30 16:27 ` Greg KH
2012-10-30 19:43 ` Dmitry Torokhov
2012-10-30 19:43 ` Dmitry Torokhov
2012-10-30 19:59 ` Greg KH
2012-10-30 19:59 ` Greg KH
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=2950075.FZEQUln4vx@dtor-d630.eng.vmware.com \
--to=dtor@vmware.com \
--cc=georgezhang@vmware.com \
--cc=gregkh@linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=pv-drivers@vmware.com \
--cc=virtualization@lists.linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.