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From: Andrea Arcangeli <andrea@qumranet.com>
To: Nick Piggin <npiggin@suse.de>
Cc: akpm@linux-foundation.org, 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>,
general@lists.openfabrics.org,
Steve Wise <swise@opengridcomputing.com>,
Roland Dreier <rdreier@cisco.com>,
Kanoj Sarcar <kanojsarcar@yahoo.com>,
steiner@sgi.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, daniel.blueman@quadrics.com,
Christoph Lameter <clameter@sgi.com>
Subject: Re: [patch] my mmu notifiers
Date: Wed, 20 Feb 2008 02:09:41 +0100 [thread overview]
Message-ID: <20080220010941.GR7128@v2.random> (raw)
In-Reply-To: <20080219231157.GC18912@wotan.suse.de>
On Wed, Feb 20, 2008 at 12:11:57AM +0100, Nick Piggin wrote:
> Sorry, I realise I still didn't get this through my head yet (and also
> have not seen your patch recently). So I don't know exactly what you
> are doing...
The last version was posted here:
http://marc.info/?l=kvm-devel&m=120321732521533&w=2
> But why does _anybody_ (why does Christoph's patches) need to invalidate
> when they are going to be more permissive? This should be done lazily by
> the driver, I would have thought.
This can be done lazily by the driver yes. The place where I've an
invalidate_pages in mprotect however can also become less permissive.
It's simpler to invalidate always and it's not guaranteed the
secondary mmu page fault is capable of refreshing the spte across a
writeprotect fault. In the future this can be changed to
mprotect_pages though, so no page fault will happen in the secondary
mmu.
next prev parent reply other threads:[~2008-02-20 1:09 UTC|newest]
Thread overview: 115+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-19 8:43 [patch] my mmu notifiers Nick Piggin
2008-02-19 8:44 ` [patch] my mmu notifier sample driver Nick Piggin
2008-02-19 11:59 ` [patch] my mmu notifiers Robin Holt
2008-02-19 13:58 ` Andrea Arcangeli
2008-02-19 14:27 ` Jack Steiner
2008-02-19 23:04 ` Nick Piggin
2008-02-20 0:52 ` Andrea Arcangeli
2008-02-20 2:46 ` Robin Holt
2008-02-27 22:50 ` Christoph Lameter
2008-02-19 22:59 ` Nick Piggin
2008-02-20 0:46 ` Andrea Arcangeli
2008-02-27 22:55 ` Christoph Lameter
2008-02-19 23:11 ` Nick Piggin
2008-02-19 23:40 ` Jack Steiner
2008-02-21 4:42 ` Nick Piggin
2008-02-22 16:31 ` Jack Steiner
2008-02-20 1:09 ` Andrea Arcangeli [this message]
2008-02-20 10:39 ` [PATCH] mmu notifiers #v6 Andrea Arcangeli
2008-02-20 10:45 ` [PATCH] KVM swapping (+ seqlock fix) with " Andrea Arcangeli
2008-02-27 22:06 ` [PATCH] KVM swapping with mmu notifiers #v7 Andrea Arcangeli
2008-02-28 8:42 ` izik eidus
2008-02-20 11:33 ` [PATCH] mmu notifiers #v6 Robin Holt
2008-02-20 12:03 ` Andrea Arcangeli
2008-02-20 12:24 ` Robin Holt
2008-02-20 12:32 ` Andrea Arcangeli
2008-02-20 13:15 ` Robin Holt
2008-02-21 5:02 ` Nick Piggin
2008-02-20 14:41 ` Robin Holt
2008-02-20 15:34 ` Andrea Arcangeli
2008-02-20 21:03 ` Jack Steiner
2008-02-21 4:54 ` Nick Piggin
2008-02-21 14:40 ` Andrea Arcangeli
2008-02-21 16:10 ` Jack Steiner
2008-02-27 19:26 ` [PATCH] mmu notifiers #v7 Andrea Arcangeli
2008-02-27 20:04 ` Peter Zijlstra
2008-02-27 23:06 ` Christoph Lameter
2008-02-27 23:43 ` [kvm-devel] " Andrea Arcangeli
2008-02-28 0:08 ` Christoph Lameter
2008-02-28 0:21 ` Andrea Arcangeli
2008-02-28 0:24 ` Christoph Lameter
2008-02-28 19:48 ` Christoph Lameter
2008-02-28 21:52 ` Andrea Arcangeli
2008-02-28 22:00 ` Christoph Lameter
2008-02-28 23:17 ` Jack Steiner
2008-02-29 0:24 ` Andrea Arcangeli
2008-02-29 1:13 ` Christoph Lameter
2008-02-28 23:05 ` Christoph Lameter
2008-02-29 0:40 ` Andrea Arcangeli
2008-02-29 0:56 ` Andrew Morton
2008-02-29 1:03 ` Christoph Lameter
2008-02-29 13:09 ` Andrea Arcangeli
2008-02-29 19:46 ` Christoph Lameter
2008-03-02 15:54 ` [PATCH] mmu notifiers #v8 Andrea Arcangeli
2008-03-02 16:03 ` [PATCH] mmu notifiers #v8 + xpmem Andrea Arcangeli
2008-03-02 16:23 ` Peter Zijlstra
2008-03-03 3:29 ` [PATCH] mmu notifiers #v8 Nick Piggin
2008-03-03 12:51 ` Andrea Arcangeli
2008-03-03 13:10 ` Nick Piggin
2008-03-03 13:24 ` Andrea Arcangeli
2008-03-03 15:18 ` Jack Steiner
2008-03-03 16:59 ` Nick Piggin
2008-03-03 18:06 ` Jack Steiner
2008-03-03 18:09 ` Avi Kivity
2008-03-03 18:23 ` Jack Steiner
2008-03-03 18:45 ` Nick Piggin
2008-03-03 19:15 ` Jack Steiner
2008-03-04 10:35 ` Peter Zijlstra
2008-03-04 14:44 ` Jack Steiner
2008-03-03 19:02 ` Christoph Lameter
2008-03-03 19:01 ` Christoph Lameter
2008-03-03 21:15 ` Andrea Arcangeli
2008-03-05 0:37 ` Nick Piggin
2008-03-05 18:48 ` Christoph Lameter
2008-03-06 2:59 ` Nick Piggin
2008-03-03 3:33 ` Nick Piggin
2008-03-03 19:03 ` Christoph Lameter
2008-03-03 3:34 ` Nick Piggin
2008-03-03 19:04 ` Christoph Lameter
2008-03-03 3:39 ` Nick Piggin
2008-03-03 21:37 ` [PATCH] mmu notifiers #v9 Andrea Arcangeli
2008-03-03 22:05 ` [PATCH] KVM swapping with " Andrea Arcangeli
2008-03-04 0:44 ` izik eidus
2008-03-04 7:31 ` [RFC] Notifier for Externally Mapped Memory (EMM) Christoph Lameter
2008-03-04 7:34 ` [Early draft] Conversion of i_mmap_lock to semaphore Christoph Lameter
2008-03-04 13:30 ` [RFC] Notifier for Externally Mapped Memory (EMM) Andrea Arcangeli
2008-03-04 19:00 ` Christoph Lameter
2008-03-04 22:20 ` Andrea Arcangeli
2008-03-04 22:35 ` Christoph Lameter
2008-03-04 22:42 ` Peter Zijlstra
2008-03-04 23:14 ` Christoph Lameter
2008-03-04 23:25 ` Peter Zijlstra
2008-03-04 23:30 ` Peter Zijlstra
2008-03-05 5:09 ` Avi Kivity
2008-03-05 9:47 ` Robin Holt
2008-03-05 9:53 ` Avi Kivity
2008-03-05 10:02 ` [kvm-devel] " Dor Laor
2008-03-07 15:17 ` [PATCH] 2/4 move all invalidate_page outside of PT lock (#v9 was 1/4) Andrea Arcangeli
2008-03-07 15:23 ` [PATCH] 3/4 combine RCU with seqlock to allow mmu notifier methods to sleep " Andrea Arcangeli
2008-03-07 15:52 ` [PATCH] 4/4 i_mmap_lock spinlock2rwsem " Andrea Arcangeli
2008-03-07 20:03 ` Christoph Lameter
2008-03-19 21:27 ` Christoph Lameter
2008-03-07 16:52 ` [PATCH] 3/4 combine RCU with seqlock to allow mmu notifier methods to sleep " Peter Zijlstra
2008-03-07 17:50 ` Andrea Arcangeli
2008-03-07 18:01 ` Peter Zijlstra
2008-03-07 18:45 ` Andrea Arcangeli
2008-03-07 19:47 ` Andrea Arcangeli
2008-03-07 20:15 ` Christoph Lameter
2008-03-07 20:12 ` Christoph Lameter
2008-03-07 20:10 ` Christoph Lameter
2008-03-07 20:00 ` Christoph Lameter
2008-03-07 19:54 ` [PATCH] 2/4 move all invalidate_page outside of PT lock " Christoph Lameter
2008-03-04 13:21 ` [PATCH] KVM swapping with mmu notifiers #v9 Andrea Arcangeli
2008-02-21 4:47 ` [patch] my mmu notifiers Nick Piggin
2008-02-20 2:49 ` Robin Holt
2008-02-27 22:56 ` Christoph Lameter
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