Re: [PATCH 08 of 11] anon-vma-rwsem

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To: Linus Torvalds <torvalds@...>
Cc: Andrew Morton <akpm@...>, Christoph Lameter <clameter@...>, Jack Steiner <steiner@...>, Robin Holt <holt@...>, Nick Piggin <npiggin@...>, Peter Zijlstra <a.p.zijlstra@...>, <kvm-devel@...>, Kanoj Sarcar <kanojsarcar@...>, Roland Dreier <rdreier@...>, Steve Wise <swise@...>, <linux-kernel@...>, Avi Kivity <avi@...>, <linux-mm@...>, <general@...>, Hugh Dickins <hugh@...>, Rusty Russell <rusty@...>, Anthony Liguori <aliguori@...>, Chris Wright <chrisw@...>, Marcelo Tosatti <marcelo@...>, Eric Dumazet <dada1@...>, Paul E. McKenney <paulmck@...>
Date: Wednesday, May 7, 2008 - 5:26 pm

On Wed, May 07, 2008 at 01:56:23PM -0700, Linus Torvalds wrote:

Glad you agree. Note that the fact the whole series looks bad, is
_exactly_ why I couldn't let Christoph keep going with
mmu-notifier-core at the very end of his patchset. I had to move it at
the top to have a chance to get the KVM and GRU requirements merged
in 2.6.26.

I think the spinlock->rwsem conversion is ok under config option, as
you can see I complained myself to various of those patches and I'll
take care they're in a mergeable state the moment I submit them. What
XPMEM requires are different semantics for the methods, and we never
had to do any blocking I/O during vmtruncate before, now we have to.
And I don't see a problem in making the conversion from
spinlock->rwsem only if CONFIG_XPMEM=y as I doubt XPMEM works on
anything but ia64.

Please ignore all patches but mmu-notifier-core. I regularly forward
_only_ mmu-notifier-core to Andrew, that's the only one that is in
merge-ready status, everything else is just so XPMEM can test and we
can keep discussing it to bring it in a mergeable state like
mmu-notifier-core already is.
--
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Messages in current thread:
[PATCH 00 of 11] mmu notifier #v16, Andrea Arcangeli, (Wed May 7, 10:35 am)
[PATCH 10 of 11] export zap_page_range for XPMEM, Andrea Arcangeli, (Wed May 7, 10:36 am)
[PATCH 11 of 11] mmap sems, Andrea Arcangeli, (Wed May 7, 10:36 am)
[PATCH 09 of 11] mm_lock-rwsem, Andrea Arcangeli, (Wed May 7, 10:35 am)
[PATCH 08 of 11] anon-vma-rwsem, Andrea Arcangeli, (Wed May 7, 10:35 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Linus Torvalds, (Wed May 7, 4:56 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Andrea Arcangeli, (Wed May 7, 5:26 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Jack Steiner, (Wed May 7, 6:42 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Linus Torvalds, (Wed May 7, 5:36 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Robin Holt, (Wed May 7, 8:38 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Nick Piggin, (Tue May 13, 8:06 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Robin Holt, (Tue May 13, 11:32 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Nick Piggin, (Wed May 14, 12:11 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Robin Holt, (Wed May 14, 7:26 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Nick Piggin, (Thu May 15, 3:57 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Christoph Lameter, (Thu May 15, 1:33 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Nick Piggin, (Thu May 15, 7:52 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Robin Holt, (Fri May 16, 7:23 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Robin Holt, (Fri May 16, 7:50 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Nick Piggin, (Tue May 20, 1:31 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Robin Holt, (Tue May 20, 6:01 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Nick Piggin, (Tue May 20, 6:50 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Robin Holt, (Tue May 20, 7:05 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Nick Piggin, (Tue May 20, 7:14 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Robin Holt, (Tue May 20, 7:26 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Robin Holt, (Thu May 15, 7:01 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Avi Kivity, (Thu May 15, 7:12 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Linus Torvalds, (Wed May 14, 11:18 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Christoph Lameter, (Wed May 14, 1:57 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Linus Torvalds, (Wed May 14, 2:27 pm)
mm notifier: Notifications when pages are unmapped., Christoph Lameter, (Fri May 16, 9:38 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Robin Holt, (Wed May 14, 12:22 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Linus Torvalds, (Wed May 14, 12:56 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Linus Torvalds, (Wed May 7, 8:55 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Andrea Arcangeli, (Wed May 7, 6:22 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Linus Torvalds, (Wed May 7, 6:44 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Andrea Arcangeli, (Wed May 7, 6:58 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Linus Torvalds, (Wed May 7, 7:09 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Andrea Arcangeli, (Wed May 7, 7:02 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Andrew Morton, (Wed May 7, 6:31 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Andrea Arcangeli, (Wed May 7, 6:44 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Benjamin Herrenschmidt, (Wed May 7, 7:28 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Andrea Arcangeli, (Wed May 7, 7:45 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Andrea Arcangeli, (Wed May 7, 9:34 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Nick Piggin, (Tue May 13, 8:14 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Benjamin Herrenschmidt, (Wed May 14, 1:43 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Jack Steiner, (Wed May 14, 9:15 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Nick Piggin, (Wed May 14, 2:06 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Andrew Morton, (Wed May 7, 6:59 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Andrea Arcangeli, (Wed May 7, 7:39 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Linus Torvalds, (Wed May 7, 9:02 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Andrea Arcangeli, (Wed May 7, 9:26 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Christoph Lameter, (Wed May 7, 9:12 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Andrea Arcangeli, (Wed May 7, 10:56 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Christoph Lameter, (Wed May 7, 11:10 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Andrea Arcangeli, (Wed May 7, 11:41 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Linus Torvalds, (Thu May 8, 12:14 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Andrea Arcangeli, (Thu May 8, 1:20 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Linus Torvalds, (Thu May 8, 11:03 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Linus Torvalds, (Thu May 8, 12:11 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Peter Zijlstra, (Fri May 9, 2:37 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Andrea Arcangeli, (Fri May 9, 2:55 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Peter Zijlstra, (Fri May 9, 3:04 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Andrea Arcangeli, (Thu May 8, 6:01 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Pekka Enberg, (Thu May 8, 1:27 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Pekka Enberg, (Thu May 8, 1:30 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Andrea Arcangeli, (Thu May 8, 1:49 am)
Re: [PATCH 08 of 11] anon-vma-rwsem, Linus Torvalds, (Wed May 7, 9:32 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Linus Torvalds, (Wed May 7, 7:19 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Christoph Lameter, (Wed May 7, 7:39 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Linus Torvalds, (Wed May 7, 8:03 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Christoph Lameter, (Wed May 7, 8:56 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Linus Torvalds, (Wed May 7, 9:39 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Andrea Arcangeli, (Wed May 7, 9:52 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Linus Torvalds, (Wed May 7, 9:57 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Andrea Arcangeli, (Wed May 7, 10:24 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Linus Torvalds, (Wed May 7, 10:32 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Linus Torvalds, (Wed May 7, 9:07 pm)
Re: [PATCH 08 of 11] anon-vma-rwsem, Robin Holt, (Wed May 7, 8:52 pm)
[PATCH 07 of 11] i_mmap_rwsem, Andrea Arcangeli, (Wed May 7, 10:35 am)
[PATCH 06 of 11] rwsem contended, Andrea Arcangeli, (Wed May 7, 10:35 am)
[PATCH 05 of 11] unmap vmas tlb flushing, Andrea Arcangeli, (Wed May 7, 10:35 am)
Re: [PATCH 05 of 11] unmap vmas tlb flushing, Rik van Riel, (Wed May 7, 1:46 pm)
[PATCH 04 of 11] free-pgtables, Andrea Arcangeli, (Wed May 7, 10:35 am)
Re: [PATCH 04 of 11] free-pgtables, Rik van Riel, (Wed May 7, 1:41 pm)
[PATCH 03 of 11] invalidate_page outside PT lock, Andrea Arcangeli, (Wed May 7, 10:35 am)
Re: [PATCH 03 of 11] invalidate_page outside PT lock, Rik van Riel, (Wed May 7, 1:39 pm)
Re: [PATCH 03 of 11] invalidate_page outside PT lock, Andrea Arcangeli, (Wed May 7, 1:57 pm)
[PATCH 01 of 11] mmu-notifier-core, Andrea Arcangeli, (Wed May 7, 10:35 am)
Re: [PATCH 01 of 11] mmu-notifier-core, Andrew Morton, (Wed May 7, 4:05 pm)
Re: [PATCH 01 of 11] mmu-notifier-core, Linus Torvalds, (Wed May 7, 4:30 pm)
Re: [PATCH 01 of 11] mmu-notifier-core, Andrea Arcangeli, (Wed May 7, 5:58 pm)
Re: [PATCH 01 of 11] mmu-notifier-core, Linus Torvalds, (Wed May 7, 6:11 pm)
Re: [PATCH 01 of 11] mmu-notifier-core, Andrea Arcangeli, (Wed May 7, 6:27 pm)
Re: [PATCH 01 of 11] mmu-notifier-core, Linus Torvalds, (Wed May 7, 7:00 pm)
Re: [PATCH 01 of 11] mmu-notifier-core, Andrea Arcangeli, (Wed May 7, 6:37 pm)
Re: [PATCH 01 of 11] mmu-notifier-core, Linus Torvalds, (Wed May 7, 7:38 pm)
Re: [ofa-general] Re: [PATCH 01 of 11] mmu-notifier-core, Andrea Arcangeli, (Wed May 7, 6:39 pm)
Re: [ofa-general] Re: [PATCH 01 of 11] mmu-notifier-core, Linus Torvalds, (Wed May 7, 7:03 pm)
Re: [PATCH 01 of 11] mmu-notifier-core, Andrew Morton, (Wed May 7, 4:02 pm)
Re: [PATCH 01 of 11] mmu-notifier-core, Rik van Riel, (Wed May 7, 1:35 pm)
[PATCH 02 of 11] get_task_mm, Andrea Arcangeli, (Wed May 7, 10:35 am)
Re: [PATCH 02 of 11] get_task_mm, Robin Holt, (Wed May 7, 11:59 am)
Re: [PATCH 02 of 11] get_task_mm, Andrea Arcangeli, (Wed May 7, 12:20 pm)