linux-kernel - Re: [PATCH 00/17] mm: mmu

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Date:	Thu, 17 Feb 2011 18:36:20 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Andrea Arcangeli <aarcange@...hat.com>
Cc:	Avi Kivity <avi@...hat.com>, Thomas Gleixner <tglx@...utronix.de>,
	Rik van Riel <riel@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	akpm@...ux-foundation.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	linux-mm@...ck.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	David Miller <davem@...emloft.net>,
	Hugh Dickins <hugh.dickins@...cali.co.uk>,
	Mel Gorman <mel@....ul.ie>, Nick Piggin <npiggin@...nel.dk>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	Yanmin Zhang <yanmin_zhang@...ux.intel.com>
Subject: Re: [PATCH 00/17] mm: mmu_gather rework

On Thu, 2011-02-17 at 17:23 +0100, Peter Zijlstra wrote:
> Rework the existing mmu_gather infrastructure.
> 
> The direct purpose of these patches was to allow preemptible mmu_gather,
> but even without that I think these patches provide an improvement to the
> status quo.
> 
> The first patch is a fix to the tile architecture, the subsequent 9 patches
> rework the mmu_gather infrastructure. For review purpose I've split them
> into generic and per-arch patches with the last of those a generic cleanup.
> 
> For the final commit I would provide a roll-up of these patches so as not
> to wreck bisectability of non generic archs.
> 
> The next patch provides generic RCU page-table freeing, and the follow up
> is a patch converting s390 to use this. I've also got 4 patches from
> DaveM lined up (not included in this series) that uses this to implement
> gup_fast() for sparc64.
> 
> Then there is one patch that extends the generic mmu_gather batching.
> 
> Finally there are 4 patches that convert various architectures over
> to asm-generic/tlb.h, these are compile tested only and basically RFC.
> 
> After this only um and s390 are left -- um should be straight forward,
> s390 wants a bit more, but more on that in another email.

---
 arch/Kconfig                           |    6 
 arch/alpha/mm/init.c                   |    2 
 arch/arm/Kconfig                       |    1 
 arch/arm/include/asm/tlb.h             |   83 ------------
 arch/arm/include/asm/tlbflush.h        |    5 
 arch/arm/mm/mmu.c                      |    2 
 arch/avr32/mm/init.c                   |    2 
 arch/cris/mm/init.c                    |    2 
 arch/frv/mm/init.c                     |    2 
 arch/ia64/Kconfig                      |    1 
 arch/ia64/include/asm/tlb.h            |  147 +--------------------
 arch/ia64/mm/init.c                    |    2 
 arch/m32r/mm/init.c                    |    2 
 arch/m68k/mm/init.c                    |    2 
 arch/microblaze/mm/init.c              |    2 
 arch/mips/mm/init.c                    |    2 
 arch/mn10300/mm/init.c                 |    2 
 arch/parisc/mm/init.c                  |    2 
 arch/powerpc/Kconfig                   |    1 
 arch/powerpc/include/asm/pgalloc.h     |   21 ++-
 arch/powerpc/include/asm/thread_info.h |    2 
 arch/powerpc/kernel/process.c          |   23 +++
 arch/powerpc/mm/pgtable.c              |  104 ---------------
 arch/powerpc/mm/tlb_hash32.c           |    3 
 arch/powerpc/mm/tlb_hash64.c           |   11 -
 arch/powerpc/mm/tlb_nohash.c           |    3 
 arch/s390/Kconfig                      |    1 
 arch/s390/include/asm/pgalloc.h        |   19 +-
 arch/s390/include/asm/tlb.h            |  100 +++++++-------
 arch/s390/mm/pgtable.c                 |  193 +++-------------------------
 arch/score/mm/init.c                   |    2 
 arch/sh/Kconfig                        |    1 
 arch/sh/include/asm/tlb.h              |   92 -------------
 arch/sh/mm/init.c                      |    1 
 arch/sparc/include/asm/pgalloc_64.h    |    3 
 arch/sparc/include/asm/pgtable_64.h    |   15 +-
 arch/sparc/include/asm/tlb_64.h        |   91 -------------
 arch/sparc/include/asm/tlbflush_64.h   |   12 +
 arch/sparc/mm/init_32.c                |    2 
 arch/sparc/mm/tlb.c                    |   43 +++---
 arch/sparc/mm/tsb.c                    |   15 +-
 arch/tile/mm/init.c                    |    2 
 arch/tile/mm/pgtable.c                 |   15 --
 arch/um/include/asm/tlb.h              |   29 +---
 arch/um/kernel/smp.c                   |    3 
 arch/x86/mm/init.c                     |    2 
 arch/xtensa/mm/mmu.c                   |    2 
 fs/exec.c                              |   10 -
 include/asm-generic/tlb.h              |  227 +++++++++++++++++++++++++++------
 include/linux/mm.h                     |    2 
 mm/memory.c                            |  119 +++++++++++++----
 mm/mmap.c                              |   18 +-
 52 files changed, 536 insertions(+), 918 deletions(-)

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