From: Andrea Arcangeli <andrea@qumranet.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: Nick Piggin <npiggin@suse.de>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
linux-mm@kvack.org,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
steiner@sgi.com, linux-kernel@vger.kernel.org,
Avi Kivity <avi@qumranet.com>,
kvm-devel@lists.sourceforge.net, daniel.blueman@quadrics.com,
Robin Holt <holt@sgi.com>, Hugh Dickins <hugh@veritas.com>
Subject: Re: [kvm-devel] [patch 2/6] mmu_notifier: Callbacks to invalidate address ranges
Date: Thu, 31 Jan 2008 14:39:12 +0100 [thread overview]
Message-ID: <20080131133912.GM7185@v2.random> (raw)
In-Reply-To: <Pine.LNX.4.64.0801301848550.14263@schroedinger.engr.sgi.com>
On Wed, Jan 30, 2008 at 06:51:26PM -0800, Christoph Lameter wrote:
> True. hlist_del_init ok? That would allow to check the driver that the
> mmu_notifier is already linked in using !hlist_unhashed(). Driver then
> needs to properly initialize the mmu_notifier list with INIT_HLIST_NODE().
A driver couldn't possibly care about the mmu notifier anymore at that
point, we just agreed a moment ago that the list can't change under
mmu_notifier_release, and in turn no driver could possibly call
mmu_notifier_unregister/register at that point anymore regardless of
the outcome of hlist_unhashed and external serialization must let the
driver know he's done with the notifiers.
WARNING: multiple messages have this Message-ID (diff)
From: Andrea Arcangeli <andrea-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
To: Christoph Lameter <clameter-sJ/iWh9BUns@public.gmane.org>
Cc: Nick Piggin <npiggin-l3A5Bk7waGM@public.gmane.org>,
Peter Zijlstra
<a.p.zijlstra-/NLkJaSkS4VmR6Xm/wNWPw@public.gmane.org>,
kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
Benjamin Herrenschmidt
<benh-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org>,
steiner-sJ/iWh9BUns@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>,
linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
daniel.blueman-xqY44rlHlBpWk0Htik3J/w@public.gmane.org,
Robin Holt <holt-sJ/iWh9BUns@public.gmane.org>,
Hugh Dickins <hugh-DTz5qymZ9yRBDgjK7y7TUQ@public.gmane.org>
Subject: Re: [patch 2/6] mmu_notifier: Callbacks to invalidate address ranges
Date: Thu, 31 Jan 2008 14:39:12 +0100 [thread overview]
Message-ID: <20080131133912.GM7185@v2.random> (raw)
In-Reply-To: <Pine.LNX.4.64.0801301848550.14263-RYO/mD75kfhx2SFC9UQUAuF7EQX82lMiAL8bYrjMMd8@public.gmane.org>
On Wed, Jan 30, 2008 at 06:51:26PM -0800, Christoph Lameter wrote:
> True. hlist_del_init ok? That would allow to check the driver that the
> mmu_notifier is already linked in using !hlist_unhashed(). Driver then
> needs to properly initialize the mmu_notifier list with INIT_HLIST_NODE().
A driver couldn't possibly care about the mmu notifier anymore at that
point, we just agreed a moment ago that the list can't change under
mmu_notifier_release, and in turn no driver could possibly call
mmu_notifier_unregister/register at that point anymore regardless of
the outcome of hlist_unhashed and external serialization must let the
driver know he's done with the notifiers.
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WARNING: multiple messages have this Message-ID (diff)
From: Andrea Arcangeli <andrea@qumranet.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: Nick Piggin <npiggin@suse.de>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
linux-mm@kvack.org,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
steiner@sgi.com, linux-kernel@vger.kernel.org,
Avi Kivity <avi@qumranet.com>,
kvm-devel@lists.sourceforge.net, daniel.blueman@quadrics.com,
Robin Holt <holt@sgi.com>, Hugh Dickins <hugh@veritas.com>
Subject: Re: [kvm-devel] [patch 2/6] mmu_notifier: Callbacks to invalidate address ranges
Date: Thu, 31 Jan 2008 14:39:12 +0100 [thread overview]
Message-ID: <20080131133912.GM7185@v2.random> (raw)
In-Reply-To: <Pine.LNX.4.64.0801301848550.14263@schroedinger.engr.sgi.com>
On Wed, Jan 30, 2008 at 06:51:26PM -0800, Christoph Lameter wrote:
> True. hlist_del_init ok? That would allow to check the driver that the
> mmu_notifier is already linked in using !hlist_unhashed(). Driver then
> needs to properly initialize the mmu_notifier list with INIT_HLIST_NODE().
A driver couldn't possibly care about the mmu notifier anymore at that
point, we just agreed a moment ago that the list can't change under
mmu_notifier_release, and in turn no driver could possibly call
mmu_notifier_unregister/register at that point anymore regardless of
the outcome of hlist_unhashed and external serialization must let the
driver know he's done with the notifiers.
--
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next prev parent reply other threads:[~2008-01-31 13:39 UTC|newest]
Thread overview: 197+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-28 20:28 [patch 0/6] [RFC] MMU Notifiers V2 Christoph Lameter
2008-01-28 20:28 ` Christoph Lameter
2008-01-28 20:28 ` [patch 1/6] mmu_notifier: Core code Christoph Lameter
2008-01-28 20:28 ` Christoph Lameter
2008-01-28 22:06 ` Christoph Lameter
2008-01-28 22:06 ` Christoph Lameter
2008-01-28 22:06 ` Christoph Lameter
2008-01-29 0:05 ` Robin Holt
2008-01-29 0:05 ` Robin Holt
2008-01-29 0:05 ` Robin Holt
2008-01-29 1:19 ` Christoph Lameter
2008-01-29 1:19 ` Christoph Lameter
2008-01-29 1:19 ` Christoph Lameter
2008-01-29 13:59 ` Andrea Arcangeli
2008-01-29 13:59 ` Andrea Arcangeli
2008-01-29 13:59 ` Andrea Arcangeli
2008-01-29 14:34 ` Andrea Arcangeli
2008-01-29 14:34 ` Andrea Arcangeli
2008-01-29 14:34 ` Andrea Arcangeli
2008-01-29 19:49 ` Christoph Lameter
2008-01-29 19:49 ` Christoph Lameter
2008-01-29 19:49 ` Christoph Lameter
2008-01-29 20:41 ` Avi Kivity
2008-01-29 20:41 ` Avi Kivity
2008-01-29 20:41 ` Avi Kivity
2008-01-29 16:07 ` Robin Holt
2008-01-29 16:07 ` Robin Holt
2008-01-29 16:07 ` Robin Holt
2008-02-05 18:05 ` Andy Whitcroft
2008-02-05 18:05 ` Andy Whitcroft
2008-02-05 18:05 ` Andy Whitcroft
2008-02-05 18:17 ` Peter Zijlstra
2008-02-05 18:17 ` Peter Zijlstra
2008-02-05 18:19 ` Christoph Lameter
2008-02-05 18:19 ` Christoph Lameter
2008-02-05 18:19 ` Christoph Lameter
2008-01-28 20:28 ` [patch 2/6] mmu_notifier: Callbacks to invalidate address ranges Christoph Lameter
2008-01-28 20:28 ` Christoph Lameter
2008-01-29 16:20 ` Andrea Arcangeli
2008-01-29 16:20 ` Andrea Arcangeli
2008-01-29 16:20 ` Andrea Arcangeli
2008-01-29 18:28 ` Andrea Arcangeli
2008-01-29 18:28 ` Andrea Arcangeli
2008-01-29 18:28 ` Andrea Arcangeli
2008-01-29 20:30 ` Christoph Lameter
2008-01-29 20:30 ` Christoph Lameter
2008-01-29 20:30 ` Christoph Lameter
2008-01-29 21:36 ` Andrea Arcangeli
2008-01-29 21:36 ` Andrea Arcangeli
2008-01-29 21:36 ` Andrea Arcangeli
2008-01-29 21:53 ` Christoph Lameter
2008-01-29 21:53 ` Christoph Lameter
2008-01-29 21:53 ` Christoph Lameter
2008-01-29 22:35 ` Andrea Arcangeli
2008-01-29 22:35 ` Andrea Arcangeli
2008-01-29 22:35 ` Andrea Arcangeli
2008-01-29 22:55 ` Christoph Lameter
2008-01-29 22:55 ` Christoph Lameter
2008-01-29 22:55 ` Christoph Lameter
2008-01-29 23:43 ` Andrea Arcangeli
2008-01-29 23:43 ` Andrea Arcangeli
2008-01-29 23:43 ` Andrea Arcangeli
2008-01-30 0:34 ` Christoph Lameter
2008-01-30 0:34 ` Christoph Lameter
2008-01-30 0:34 ` Christoph Lameter
2008-01-29 19:55 ` Christoph Lameter
2008-01-29 19:55 ` Christoph Lameter
2008-01-29 19:55 ` Christoph Lameter
2008-01-29 21:17 ` Andrea Arcangeli
2008-01-29 21:17 ` Andrea Arcangeli
2008-01-29 21:35 ` Christoph Lameter
2008-01-29 21:35 ` Christoph Lameter
2008-01-29 21:35 ` Christoph Lameter
2008-01-29 22:02 ` Andrea Arcangeli
2008-01-29 22:02 ` Andrea Arcangeli
2008-01-29 22:02 ` Andrea Arcangeli
2008-01-29 22:39 ` Christoph Lameter
2008-01-29 22:39 ` Christoph Lameter
2008-01-29 22:39 ` Christoph Lameter
2008-01-30 0:00 ` Andrea Arcangeli
2008-01-30 0:00 ` Andrea Arcangeli
2008-01-30 0:00 ` Andrea Arcangeli
2008-01-30 0:05 ` Andrea Arcangeli
2008-01-30 0:05 ` Andrea Arcangeli
2008-01-30 0:05 ` Andrea Arcangeli
2008-01-30 0:22 ` Christoph Lameter
2008-01-30 0:22 ` Christoph Lameter
2008-01-30 0:22 ` Christoph Lameter
2008-01-30 0:59 ` Andrea Arcangeli
2008-01-30 0:59 ` Andrea Arcangeli
2008-01-30 0:59 ` Andrea Arcangeli
2008-01-30 8:26 ` Peter Zijlstra
2008-01-30 8:26 ` Peter Zijlstra
2008-01-30 0:20 ` Christoph Lameter
2008-01-30 0:20 ` Christoph Lameter
2008-01-30 0:20 ` Christoph Lameter
2008-01-30 0:28 ` Jack Steiner
2008-01-30 0:28 ` Jack Steiner
2008-01-30 0:28 ` Jack Steiner
2008-01-30 0:35 ` Christoph Lameter
2008-01-30 0:35 ` Christoph Lameter
2008-01-30 0:35 ` Christoph Lameter
2008-01-30 13:37 ` Andrea Arcangeli
2008-01-30 13:37 ` Andrea Arcangeli
2008-01-30 13:37 ` Andrea Arcangeli
2008-01-30 14:43 ` Jack Steiner
2008-01-30 14:43 ` Jack Steiner
2008-01-30 14:43 ` Jack Steiner
2008-01-30 19:41 ` Christoph Lameter
2008-01-30 19:41 ` Christoph Lameter
2008-01-30 19:41 ` Christoph Lameter
2008-01-30 20:29 ` Jack Steiner
2008-01-30 20:29 ` Jack Steiner
2008-01-30 20:29 ` Jack Steiner
2008-01-30 20:55 ` Christoph Lameter
2008-01-30 20:55 ` Christoph Lameter
2008-01-30 20:55 ` Christoph Lameter
2008-01-30 16:11 ` Robin Holt
2008-01-30 16:11 ` Robin Holt
2008-01-30 16:11 ` Robin Holt
2008-01-30 17:04 ` Andrea Arcangeli
2008-01-30 17:04 ` Andrea Arcangeli
2008-01-30 17:04 ` Andrea Arcangeli
2008-01-30 17:30 ` Robin Holt
2008-01-30 17:30 ` Robin Holt
2008-01-30 17:30 ` Robin Holt
2008-01-30 18:25 ` Andrea Arcangeli
2008-01-30 18:25 ` Andrea Arcangeli
2008-01-30 18:25 ` Andrea Arcangeli
2008-01-30 19:50 ` Christoph Lameter
2008-01-30 19:50 ` Christoph Lameter
2008-01-30 19:50 ` Christoph Lameter
2008-01-30 22:18 ` Robin Holt
2008-01-30 22:18 ` Robin Holt
2008-01-30 22:18 ` Robin Holt
2008-01-30 23:52 ` Andrea Arcangeli
2008-01-30 23:52 ` Andrea Arcangeli
2008-01-31 0:01 ` Christoph Lameter
2008-01-31 0:01 ` Christoph Lameter
2008-01-31 0:01 ` Christoph Lameter
2008-01-31 0:34 ` [kvm-devel] " Andrea Arcangeli
2008-01-31 0:34 ` Andrea Arcangeli
2008-01-31 0:34 ` Andrea Arcangeli
2008-01-31 1:46 ` [kvm-devel] " Christoph Lameter
2008-01-31 1:46 ` Christoph Lameter
2008-01-31 1:46 ` Christoph Lameter
2008-01-31 2:34 ` [kvm-devel] " Robin Holt
2008-01-31 2:34 ` Robin Holt
2008-01-31 2:34 ` Robin Holt
2008-01-31 2:37 ` [kvm-devel] " Christoph Lameter
2008-01-31 2:37 ` Christoph Lameter
2008-01-31 2:37 ` Christoph Lameter
2008-01-31 2:56 ` [kvm-devel] mmu_notifier: invalidate_range_start with lock=1 Christoph Lameter
2008-01-31 2:56 ` Christoph Lameter
2008-01-31 2:56 ` Christoph Lameter
2008-01-31 10:52 ` [kvm-devel] [patch 2/6] mmu_notifier: Callbacks to invalidate address ranges Andrea Arcangeli
2008-01-31 10:52 ` Andrea Arcangeli
2008-01-31 10:52 ` Andrea Arcangeli
2008-01-31 2:08 ` [kvm-devel] " Christoph Lameter
2008-01-31 2:08 ` Christoph Lameter
2008-01-31 2:08 ` Christoph Lameter
2008-01-31 2:42 ` [kvm-devel] " Andrea Arcangeli
2008-01-31 2:42 ` Andrea Arcangeli
2008-01-31 2:42 ` Andrea Arcangeli
2008-01-31 2:51 ` [kvm-devel] " Christoph Lameter
2008-01-31 2:51 ` Christoph Lameter
2008-01-31 2:51 ` Christoph Lameter
2008-01-31 13:39 ` Andrea Arcangeli [this message]
2008-01-31 13:39 ` [kvm-devel] " Andrea Arcangeli
2008-01-31 13:39 ` Andrea Arcangeli
2008-01-30 19:35 ` Christoph Lameter
2008-01-30 19:35 ` Christoph Lameter
2008-01-30 19:35 ` Christoph Lameter
2008-01-28 20:28 ` [patch 3/6] mmu_notifier: invalidate_page callbacks for subsystems with rmap Christoph Lameter
2008-01-28 20:28 ` Christoph Lameter
2008-01-29 16:28 ` Robin Holt
2008-01-29 16:28 ` Robin Holt
2008-01-28 20:28 ` [patch 4/6] MMU notifier: invalidate_page callbacks using Linux rmaps Christoph Lameter
2008-01-28 20:28 ` Christoph Lameter
2008-01-29 14:03 ` Andrea Arcangeli
2008-01-29 14:03 ` Andrea Arcangeli
2008-01-29 14:03 ` Andrea Arcangeli
2008-01-29 14:24 ` Andrea Arcangeli
2008-01-29 14:24 ` Andrea Arcangeli
2008-01-29 14:24 ` Andrea Arcangeli
2008-01-29 19:51 ` Christoph Lameter
2008-01-29 19:51 ` Christoph Lameter
2008-01-29 19:51 ` Christoph Lameter
2008-01-28 20:28 ` [patch 5/6] mmu_notifier: Callbacks for xip_filemap.c Christoph Lameter
2008-01-28 20:28 ` Christoph Lameter
2008-01-28 20:28 ` [patch 6/6] mmu_notifier: Add invalidate_all() Christoph Lameter
2008-01-28 20:28 ` Christoph Lameter
2008-01-29 16:31 ` Robin Holt
2008-01-29 16:31 ` Robin Holt
2008-01-29 20:02 ` Christoph Lameter
2008-01-29 20:02 ` Christoph Lameter
2008-01-29 20:02 ` Christoph Lameter
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