From: Christoph Lameter <clameter@sgi.com>
To: Andrea Arcangeli <andrea@qumranet.com>
Cc: Nick Piggin <npiggin@suse.de>, Jack Steiner <steiner@sgi.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
kvm-devel@lists.sourceforge.net,
Kanoj Sarcar <kanojsarcar@yahoo.com>,
Roland Dreier <rdreier@cisco.com>,
Steve Wise <swise@opengridcomputing.com>,
linux-kernel@vger.kernel.org, Avi Kivity <avi@qumranet.com>,
linux-mm@kvack.org, Robin Holt <holt@sgi.com>,
general@lists.openfabrics.org, Hugh Dickins <hugh@veritas.com>,
akpm@linux-foundation.org, Rusty Russell <rusty@rustcorp.com.au>
Subject: Re: [PATCH 01 of 12] Core of mmu notifiers
Date: Tue, 22 Apr 2008 13:19:29 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0804221315160.3640@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <ea87c15371b1bd49380c.1208872277@duo.random>
Thanks for adding most of my enhancements. But
1. There is no real need for invalidate_page(). Can be done with
invalidate_start/end. Needlessly complicates the API. One
of the objections by Andrew was that there mere multiple
callbacks that perform similar functions.
2. The locks that are used are later changed to semaphores. This is
f.e. true for mm_lock / mm_unlock. The diffs will be smaller if the
lock conversion is done first and then mm_lock is introduced. The
way the patches are structured means that reviewers cannot review the
final version of mm_lock etc etc. The lock conversion needs to come
first.
3. As noted by Eric and also contained in private post from yesterday by
me: The cmp function needs to retrieve the value before
doing comparisons which is not done for the == of a and b.
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next prev parent reply other threads:[~2008-04-22 20:19 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-22 13:51 [PATCH 00 of 12] mmu notifier #v13 Andrea Arcangeli
2008-04-22 13:51 ` [PATCH 01 of 12] Core of mmu notifiers Andrea Arcangeli
2008-04-22 14:56 ` Eric Dumazet
2008-04-22 15:15 ` Andrea Arcangeli
2008-04-22 15:24 ` Avi Kivity
2008-04-22 15:37 ` Eric Dumazet
2008-04-22 16:46 ` Andrea Arcangeli
2008-04-22 20:19 ` Christoph Lameter [this message]
2008-04-22 20:31 ` Robin Holt
2008-04-22 22:35 ` Andrea Arcangeli
2008-04-22 23:07 ` Robin Holt
2008-04-23 0:28 ` Jack Steiner
2008-04-23 16:37 ` Andrea Arcangeli
2008-04-23 18:19 ` Christoph Lameter
2008-04-23 18:25 ` Andrea Arcangeli
2008-04-23 22:19 ` Andrea Arcangeli
2008-04-24 6:49 ` Andrea Arcangeli
2008-04-24 9:51 ` Robin Holt
2008-04-24 15:39 ` Andrea Arcangeli
2008-04-24 17:41 ` Andrea Arcangeli
2008-04-26 13:17 ` Robin Holt
2008-04-26 14:04 ` Andrea Arcangeli
2008-04-27 12:27 ` Andrea Arcangeli
2008-04-28 20:34 ` Christoph Lameter
2008-04-29 0:10 ` Andrea Arcangeli
2008-04-29 1:28 ` Christoph Lameter
2008-04-29 15:30 ` Andrea Arcangeli
2008-04-29 15:50 ` Robin Holt
2008-04-29 16:03 ` Andrea Arcangeli
2008-05-07 15:00 ` Andrea Arcangeli
2008-04-29 10:49 ` Hugh Dickins
2008-04-29 13:32 ` Andrea Arcangeli
2008-04-23 13:36 ` Andrea Arcangeli
2008-04-23 14:47 ` Robin Holt
2008-04-23 15:59 ` Andrea Arcangeli
2008-04-23 18:09 ` Christoph Lameter
2008-04-23 18:19 ` Andrea Arcangeli
2008-04-23 18:27 ` Christoph Lameter
2008-04-23 18:37 ` Andrea Arcangeli
2008-04-23 18:46 ` Christoph Lameter
2008-04-22 23:20 ` Christoph Lameter
2008-04-23 16:26 ` Andrea Arcangeli
2008-04-23 17:24 ` Andrea Arcangeli
2008-04-23 18:21 ` Christoph Lameter
2008-04-23 18:34 ` Andrea Arcangeli
2008-04-23 18:15 ` Christoph Lameter
2008-04-23 17:09 ` Jack Steiner
2008-04-23 17:45 ` Andrea Arcangeli
2008-04-22 13:51 ` [PATCH 02 of 12] Fix ia64 compilation failure because of common code include bug Andrea Arcangeli
2008-04-22 20:22 ` Christoph Lameter
2008-04-22 22:43 ` Andrea Arcangeli
2008-04-22 23:07 ` Robin Holt
2008-04-22 13:51 ` [PATCH 03 of 12] get_task_mm should not succeed if mmput() is running and has reduced Andrea Arcangeli
2008-04-22 20:23 ` Christoph Lameter
2008-04-22 22:37 ` Andrea Arcangeli
2008-04-22 23:13 ` Christoph Lameter
2008-04-22 13:51 ` [PATCH 04 of 12] Moves all mmu notifier methods outside the PT lock (first and not last Andrea Arcangeli
2008-04-22 20:24 ` Christoph Lameter
2008-04-22 22:40 ` Andrea Arcangeli
2008-04-22 23:14 ` Christoph Lameter
2008-04-23 13:44 ` Andrea Arcangeli
2008-04-23 15:45 ` Robin Holt
2008-04-23 16:15 ` Andrea Arcangeli
2008-04-23 19:55 ` Robin Holt
2008-04-23 21:05 ` Avi Kivity
2008-04-23 18:02 ` Christoph Lameter
2008-04-23 18:16 ` Andrea Arcangeli
2008-04-22 13:51 ` [PATCH 05 of 12] Move the tlb flushing into free_pgtables. The conversion of the locks Andrea Arcangeli
2008-04-22 20:25 ` Christoph Lameter
2008-04-22 13:51 ` [PATCH 06 of 12] Move the tlb flushing inside of unmap vmas. This saves us from passing Andrea Arcangeli
2008-04-22 13:51 ` [PATCH 07 of 12] Add a function to rw_semaphores to check if there are any processes Andrea Arcangeli
2008-04-22 13:51 ` [PATCH 08 of 12] The conversion to a rwsem allows notifier callbacks during rmap traversal Andrea Arcangeli
2008-04-22 13:51 ` [PATCH 09 of 12] Convert the anon_vma spinlock to a rw semaphore. This allows concurrent Andrea Arcangeli
2008-04-22 13:51 ` [PATCH 10 of 12] Convert mm_lock to use semaphores after i_mmap_lock and anon_vma_lock Andrea Arcangeli
2008-04-22 20:26 ` Christoph Lameter
2008-04-22 22:54 ` Andrea Arcangeli
2008-04-22 23:19 ` Christoph Lameter
2008-04-22 13:51 ` [PATCH 11 of 12] XPMEM would have used sys_madvise() except that madvise_dontneed() Andrea Arcangeli
2008-04-22 13:51 ` [PATCH 12 of 12] This patch adds a lock ordering rule to avoid a potential deadlock when Andrea Arcangeli
2008-04-22 18:22 ` [PATCH 00 of 12] mmu notifier #v13 Robin Holt
2008-04-22 18:43 ` Andrea Arcangeli
2008-04-22 19:42 ` Robin Holt
2008-04-22 20:30 ` Christoph Lameter
2008-04-23 13:33 ` Andrea Arcangeli
2008-04-22 20:28 ` Christoph Lameter
2008-04-23 0:31 ` Jack Steiner
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