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Re: [patch 2/6] mmu_notifier: Callbacks to invalidate address ranges

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From: Christoph Lameter <clameter@...>
To: Andrea Arcangeli <andrea@...>
Cc: Nick Piggin <nickpiggin@...>, <akpm@...>, Robin Holt <holt@...>, Avi Kivity <avi@...>, Izik Eidus <izike@...>, <kvm-devel@...>, Peter Zijlstra <a.p.zijlstra@...>, <general@...>, Steve Wise <swise@...>, Roland Dreier <rdreier@...>, Kanoj Sarcar <kanojsarcar@...>, <steiner@...>, <linux-kernel@...>, <linux-mm@...>, <daniel.blueman@...>
Subject: Re: [patch 2/6] mmu_notifier: Callbacks to invalidate address ranges
Date: Friday, February 29, 2008 - 5:03 pm

On Fri, 29 Feb 2008, Andrea Arcangeli wrote:


That means we need both the anon_vma locks and the i_mmap_lock to become 
semaphores. I think semaphores are better than mutexes. Rik and Lee saw 
some performance improvements because list can be traversed in parallel 
when the anon_vma lock is switched to be a rw lock.

Sounds like we get to a conceptually clean version here?

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Messages in current thread:
[patch 2/6] mmu_notifier: Callbacks to invalidate address ra..., Christoph Lameter, (Fri Feb 15, 2:49 am)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Nick Piggin, (Tue Feb 19, 7:08 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Christoph Lameter, (Wed Feb 27, 6:35 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Nick Piggin, (Mon Mar 3, 1:11 am)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Christoph Lameter, (Mon Mar 3, 3:28 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Nick Piggin, (Mon Mar 3, 3:50 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Christoph Lameter, (Tue Mar 4, 2:58 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Nick Piggin, (Tue Mar 4, 8:52 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Andrea Arcangeli, (Wed Feb 27, 8:11 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Christoph Lameter, (Wed Feb 27, 8:14 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Andrea Arcangeli, (Wed Feb 27, 8:52 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Robin Holt, (Thu Feb 28, 6:53 am)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Christoph Lameter, (Wed Feb 27, 9:03 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Andrea Arcangeli, (Wed Feb 27, 9:10 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Christoph Lameter, (Thu Feb 28, 2:43 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Andrea Arcangeli, (Thu Feb 28, 8:55 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Christoph Lameter, (Thu Feb 28, 8:59 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Andrea Arcangeli, (Fri Feb 29, 9:13 am)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Christoph Lameter, (Fri Feb 29, 3:55 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Andrea Arcangeli, (Fri Feb 29, 4:17 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Christoph Lameter, (Fri Feb 29, 5:03 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Andrea Arcangeli, (Fri Feb 29, 5:23 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Christoph Lameter, (Fri Feb 29, 5:34 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Andrea Arcangeli, (Fri Feb 29, 5:48 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Christoph Lameter, (Fri Feb 29, 6:12 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Andrea Arcangeli, (Fri Feb 29, 6:41 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Christoph Lameter, (Fri Feb 29, 5:29 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Christoph Lameter, (Wed Feb 27, 8:10 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Jack Steiner, (Wed Feb 27, 6:42 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Andrea Arcangeli, (Tue Feb 19, 9:00 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Christoph Lameter, (Wed Feb 27, 6:39 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Andrea Arcangeli, (Wed Feb 27, 8:38 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Robin Holt, (Tue Feb 19, 11:00 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Nick Piggin, (Tue Feb 19, 11:11 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Robin Holt, (Tue Feb 19, 11:19 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Nick Piggin, (Tue Feb 19, 4:54 am)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Andrea Arcangeli, (Tue Feb 19, 9:34 am)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Christoph Lameter, (Wed Feb 27, 6:23 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Andrea Arcangeli, (Wed Feb 27, 7:57 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Andrew Morton, (Fri Feb 15, 11:37 pm)
Re: [patch 2/6] mmu_notifier: Callbacks to invalidate addres..., Christoph Lameter, (Sat Feb 16, 3:26 pm)