From: Christoph Lameter <clameter@sgi.com>
To: Andrea Arcangeli <andrea@qumranet.com>
Cc: Robin Holt <holt@sgi.com>, Avi Kivity <avi@qumranet.com>,
Izik Eidus <izike@qumranet.com>,
kvm-devel@lists.sourceforge.net,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
steiner@sgi.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, daniel.blueman@quadrics.com
Subject: Re: [PATCH] mmu notifiers #v5
Date: Mon, 4 Feb 2008 11:09:01 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.4.64.0802041106370.9656@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20080203021704.GC7185@v2.random>
On Sun, 3 Feb 2008, Andrea Arcangeli wrote:
> > Right but that pin requires taking a refcount which we cannot do.
>
> GRU can use my patch without the pin. XPMEM obviously can't use my
> patch as my invalidate_page[s] are under the PT lock (a feature to fit
> GRU/KVM in the simplest way), this is why an incremental patch adding
> invalidate_range_start/end would be required to support XPMEM too.
Doesnt the kernel in some situations release the page before releasing the
pte lock? Then there will be an external pte pointing to a page that may
now have a different use. Its really bad if that pte does allow writes.
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next prev parent reply other threads:[~2008-02-04 19:09 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-31 4:57 [patch 0/3] [RFC] MMU Notifiers V4 Christoph Lameter
2008-01-31 4:57 ` [patch 1/3] mmu_notifier: Core code Christoph Lameter
2008-02-01 1:56 ` Jack Steiner
2008-02-01 2:24 ` Robin Holt
2008-02-01 2:37 ` Jack Steiner
2008-02-01 2:39 ` Christoph Lameter
2008-02-01 2:31 ` Robin Holt
2008-02-01 2:39 ` Christoph Lameter
2008-02-01 2:47 ` Robin Holt
2008-02-01 3:01 ` Christoph Lameter
2008-02-01 3:01 ` Jack Steiner
2008-02-01 3:03 ` Christoph Lameter
2008-02-01 3:52 ` Robin Holt
2008-02-01 3:58 ` Christoph Lameter
2008-02-01 4:15 ` Robin Holt
2008-02-03 1:33 ` Andrea Arcangeli
2008-02-04 19:13 ` Christoph Lameter
2008-01-31 4:57 ` [patch 2/3] mmu_notifier: Callbacks to invalidate address ranges Christoph Lameter
2008-01-31 12:31 ` Andrea Arcangeli
2008-01-31 20:07 ` Christoph Lameter
2008-01-31 22:01 ` mmu_notifier: close hole in fork Christoph Lameter
2008-01-31 22:16 ` mmu_notifier: reduce size of mm_struct if !CONFIG_MMU_NOTIFIER Christoph Lameter
2008-01-31 22:21 ` mmu_notifier: Move mmu_notifier_release up to get rid of the invalidat_all() callback Christoph Lameter
2008-02-01 0:13 ` Andrea Arcangeli
2008-02-01 1:52 ` Christoph Lameter
2008-02-01 1:57 ` mmu_notifier: invalidate_range for move_page_tables Christoph Lameter
2008-02-01 2:38 ` Robin Holt
2008-02-01 2:41 ` Christoph Lameter
2008-02-01 0:01 ` mmu_notifier: close hole in fork Andrea Arcangeli
2008-02-01 1:48 ` Christoph Lameter
2008-02-01 4:24 ` [patch 2/3] mmu_notifier: Callbacks to invalidate address ranges Robin Holt
2008-02-01 4:43 ` Christoph Lameter
2008-02-01 10:32 ` Robin Holt
2008-02-01 10:37 ` Robin Holt
2008-02-01 19:13 ` Christoph Lameter
2008-01-31 4:57 ` [patch 3/3] mmu_notifier: invalidate_page callbacks Christoph Lameter
2008-01-31 17:18 ` [PATCH] mmu notifiers #v5 Andrea Arcangeli
2008-01-31 20:18 ` Christoph Lameter
2008-01-31 23:09 ` Christoph Lameter
2008-01-31 23:41 ` Andrea Arcangeli
2008-02-01 1:44 ` Christoph Lameter
2008-02-01 12:09 ` Andrea Arcangeli
2008-02-01 19:23 ` Christoph Lameter
2008-02-03 2:17 ` Andrea Arcangeli
2008-02-03 3:14 ` Jack Steiner
2008-02-03 3:33 ` Andrea Arcangeli
2008-02-04 19:09 ` Christoph Lameter [this message]
2008-02-05 5:25 ` Andrea Arcangeli
2008-02-05 6:11 ` Christoph Lameter
2008-02-05 18:08 ` Andrea Arcangeli
2008-02-05 18:17 ` Christoph Lameter
2008-02-05 20:55 ` Andrea Arcangeli
2008-02-05 22:06 ` Christoph Lameter
2008-02-05 22:12 ` Robin Holt
2008-02-05 22:26 ` Andrea Arcangeli
2008-02-05 23:10 ` Christoph Lameter
2008-02-05 23:47 ` Andrea Arcangeli
2008-02-06 0:04 ` Christoph Lameter
2008-01-31 23:28 ` Andrea Arcangeli
2008-02-01 1:37 ` Christoph Lameter
2008-02-01 2:23 ` Robin Holt
2008-02-01 2:26 ` Christoph Lameter
2008-02-01 12:00 ` Andrea Arcangeli
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