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[PATCH v2 0/4] fix several TLB batch races

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  [PATCH v2 0/4] fix several TLB batch races Minchan Kim <minchan@kernel.org> - 2017-08-01 08:00 +0200
    Re: [PATCH v2 0/4] fix several TLB batch races Andrew Morton <akpm@linux-foundation.org> - 2017-08-02 00:30 +0200

#1700656 — [PATCH v2 0/4] fix several TLB batch races

Nadav and Mel founded several subtle races caused by TLB batching.
This patchset aims for solving thoses problems using embedding
[inc|dec]_tlb_flush_pending to TLB batching API.
With that, places to know TLB flush pending catch it up by
using mm_tlb_flush_pending.

Each patch includes detailed description.

This patchset is based on v4.13-rc2-mmots-2017-07-28-16-10 +
"[PATCH v5 0/3] mm: fixes of tlb_flush_pending races" from Nadav

* from v1
  * TLB batching API separation core part from arch specific one - Mel
  * introduce mm_tlb_flush_nested - Mel

Minchan Kim (4):
  mm: refactoring TLB gathering API
  mm: make tlb_flush_pending global
  mm: fix MADV_[FREE|DONTNEED] TLB flush miss problem
  mm: fix KSM data corruption

 arch/arm/include/asm/tlb.h  | 11 ++++++--
 arch/ia64/include/asm/tlb.h |  8 ++++--
 arch/s390/include/asm/tlb.h | 17 ++++++++-----
 arch/sh/include/asm/tlb.h   |  8 +++---
 arch/um/include/asm/tlb.h   | 13 +++++++---
 fs/proc/task_mmu.c          |  4 ++-
 include/asm-generic/tlb.h   |  7 ++---
 include/linux/mm_types.h    | 35 ++++++++++---------------
 mm/debug.c                  |  2 --
 mm/ksm.c                    |  3 ++-
 mm/memory.c                 | 62 +++++++++++++++++++++++++++++++--------------
 11 files changed, 107 insertions(+), 63 deletions(-)

-- 
2.7.4

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#1701551

On Tue,  1 Aug 2017 14:56:13 +0900 Minchan Kim <minchan@kernel.org> wrote:

> Nadav and Mel founded several subtle races caused by TLB batching.
> This patchset aims for solving thoses problems using embedding
> [inc|dec]_tlb_flush_pending to TLB batching API.
> With that, places to know TLB flush pending catch it up by
> using mm_tlb_flush_pending.
> 
> Each patch includes detailed description.
> 
> This patchset is based on v4.13-rc2-mmots-2017-07-28-16-10 +
> "[PATCH v5 0/3] mm: fixes of tlb_flush_pending races" from Nadav

Nadav is planning on doing a v4 of his patchset and it sounds like it
will be significantly different.

So I'll await that patch series.  Nadav, I think it would be best if
you were to integrate Minchan's patchset on top of yours and maintain the
whole set as a single series, please.  That way it all gets tested at
the same time and you're testing the hopefully-final result.  If that's
OK then please retain the various acks and reviewed-bys in the
changelogs.

And we'll need to figure out which kernel versions to fix.  Let's
target 4.13-rcX for now, and assess the feasibility and desirability of
backporting it all into -stable.

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