From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gregory Haskins Subject: Re: [KVM PATCH 3/4] eventfd: add generalized notifier interface Date: Thu, 18 Jun 2009 14:48:16 -0400 Message-ID: <4A3A8BF0.4020907@novell.com> References: <20090618173534.24119.95115.stgit@dev.haskins.net> <20090618174426.24119.69689.stgit@dev.haskins.net> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigE9C91C8052F31087C27D572B" Cc: kvm@vger.kernel.org, Linux Kernel Mailing List , Ingo Molnar , mst@redhat.com, avi@redhat.com, paulmck@linux.vnet.ibm.com, Rusty Russell To: Davide Libenzi Return-path: Received: from victor.provo.novell.com ([137.65.250.26]:38122 "EHLO victor.provo.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751078AbZFRSsa (ORCPT ); Thu, 18 Jun 2009 14:48:30 -0400 In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigE9C91C8052F31087C27D572B Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Davide Libenzi wrote: > On Thu, 18 Jun 2009, Gregory Haskins wrote: > > =20 >> We currently open-code notification registration via the f_ops->poll()= >> method of the eventfd. Lets abstract this into a notification API >> extension of eventfd, while still using the wait-queue as the underlyi= ng >> mechanism. This will allow us to manage the notification mechanism >> internal to eventfd without requiring the clients to change. This als= o >> gives us the opportunity to implement race-free release() callbacks, >> which we do later in the series. >> =20 > > Another attempt to push KVM stuff into eventfd. Also, could you please detail how you expect someone to use the POLLHUP release in a race free way without patches 3/4 + 4/4? That is not a KVM specific problem either, afaict. -Greg --------------enigE9C91C8052F31087C27D572B Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.11 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAko6i/AACgkQlOSOBdgZUxmi2QCgjpuklaETO6r9iE/CVp7Ku+lE K+kAn1N8/mabpP6ok2J4oCnSqM/g51TQ =p2N4 -----END PGP SIGNATURE----- --------------enigE9C91C8052F31087C27D572B--