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* [PATCH 0/8] membarrier cleanups
@ 2021-06-16  3:21 Andy Lutomirski
  2021-06-16  3:21 ` [PATCH 1/8] membarrier: Document why membarrier() works Andy Lutomirski
                   ` (7 more replies)
  0 siblings, 8 replies; 91+ messages in thread
From: Andy Lutomirski @ 2021-06-16  3:21 UTC (permalink / raw)
  To: x86; +Cc: Dave Hansen, LKML, linux-mm, Andrew Morton, Andy Lutomirski

membarrier() is unnecessarily tangled with the core scheduler.  Clean it
up.  While we're at it, remove the documentation and drop the pretence that
SYNC_CORE can ever be a well-defined cross-arch operation.

Andy Lutomirski (8):
  membarrier: Document why membarrier() works
  x86/mm: Handle unlazying membarrier core sync in the arch code
  membarrier: Remove membarrier_arch_switch_mm() prototype in core code
  membarrier: Make the post-switch-mm barrier explicit
  membarrier, kthread: Use _ONCE accessors for task->mm
  powerpc/membarrier: Remove special barrier on mm switch
  membarrier: Remove arm (32) support for SYNC_CORE
  membarrier: Rewrite sync_core_before_usermode() and improve
    documentation

 .../membarrier-sync-core/arch-support.txt     | 68 +++++------------
 arch/arm/Kconfig                              |  1 -
 arch/arm64/include/asm/sync_core.h            | 19 +++++
 arch/powerpc/include/asm/membarrier.h         | 27 -------
 arch/powerpc/include/asm/sync_core.h          | 14 ++++
 arch/powerpc/mm/mmu_context.c                 |  2 -
 arch/x86/Kconfig                              |  1 -
 arch/x86/include/asm/sync_core.h              |  7 +-
 arch/x86/kernel/alternative.c                 |  2 +-
 arch/x86/kernel/cpu/mce/core.c                |  2 +-
 arch/x86/mm/tlb.c                             | 54 ++++++++++---
 drivers/misc/sgi-gru/grufault.c               |  2 +-
 drivers/misc/sgi-gru/gruhandles.c             |  2 +-
 drivers/misc/sgi-gru/grukservices.c           |  2 +-
 fs/exec.c                                     |  2 +-
 include/linux/sched/mm.h                      | 42 +++++-----
 include/linux/sync_core.h                     | 21 -----
 init/Kconfig                                  |  3 -
 kernel/kthread.c                              | 16 +---
 kernel/sched/core.c                           | 44 +++--------
 kernel/sched/membarrier.c                     | 76 +++++++++++++++++--
 21 files changed, 210 insertions(+), 197 deletions(-)
 create mode 100644 arch/arm64/include/asm/sync_core.h
 delete mode 100644 arch/powerpc/include/asm/membarrier.h
 create mode 100644 arch/powerpc/include/asm/sync_core.h
 delete mode 100644 include/linux/sync_core.h

-- 
2.31.1


^ permalink raw reply	[flat|nested] 91+ messages in thread

end of thread, other threads:[~2021-06-20  2:10 UTC | newest]

Thread overview: 91+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-06-16  3:21 [PATCH 0/8] membarrier cleanups Andy Lutomirski
2021-06-16  3:21 ` [PATCH 1/8] membarrier: Document why membarrier() works Andy Lutomirski
2021-06-16  4:00   ` Nicholas Piggin
2021-06-16  7:30     ` Peter Zijlstra
2021-06-17 23:45       ` Andy Lutomirski
2021-06-16  3:21 ` [PATCH 2/8] x86/mm: Handle unlazying membarrier core sync in the arch code Andy Lutomirski
2021-06-16  4:25   ` Nicholas Piggin
2021-06-16 18:31     ` Andy Lutomirski
2021-06-16 17:49   ` Mathieu Desnoyers
2021-06-16 18:31     ` Andy Lutomirski
2021-06-16  3:21 ` [PATCH 3/8] membarrier: Remove membarrier_arch_switch_mm() prototype in core code Andy Lutomirski
2021-06-16  4:26   ` Nicholas Piggin
2021-06-16 17:52   ` Mathieu Desnoyers
2021-06-16  3:21 ` [PATCH 4/8] membarrier: Make the post-switch-mm barrier explicit Andy Lutomirski
2021-06-16  4:19   ` Nicholas Piggin
2021-06-16  7:35     ` Peter Zijlstra
2021-06-16 18:41       ` Andy Lutomirski
2021-06-17  1:37         ` Nicholas Piggin
2021-06-17  2:57           ` Andy Lutomirski
2021-06-17  5:32             ` Andy Lutomirski
2021-06-17  6:51               ` Nicholas Piggin
2021-06-17 23:49                 ` Andy Lutomirski
2021-06-19  2:53                   ` Nicholas Piggin
2021-06-19  3:20                     ` Andy Lutomirski
2021-06-19  4:27                       ` Nicholas Piggin
2021-06-17  9:08               ` [RFC][PATCH] sched: Use lightweight hazard pointers to grab lazy mms Peter Zijlstra
2021-06-17  9:10                 ` Peter Zijlstra
2021-06-17 10:00                   ` Nicholas Piggin
2021-06-17  9:13                 ` Peter Zijlstra
2021-06-17 14:06                   ` Andy Lutomirski
2021-06-17  9:28                 ` Peter Zijlstra
2021-06-17 14:03                   ` Andy Lutomirski
2021-06-17 14:10                 ` Andy Lutomirski
2021-06-17 15:45                   ` Peter Zijlstra
2021-06-18  3:29                 ` Paul E. McKenney
2021-06-18  5:04                   ` Andy Lutomirski
2021-06-17 15:02               ` [PATCH 4/8] membarrier: Make the post-switch-mm barrier explicit Paul E. McKenney
2021-06-18  0:06                 ` Andy Lutomirski
2021-06-18  3:35                   ` Paul E. McKenney
2021-06-17  8:45         ` Peter Zijlstra
2021-06-16  3:21 ` [PATCH 5/8] membarrier, kthread: Use _ONCE accessors for task->mm Andy Lutomirski
2021-06-16  4:28   ` Nicholas Piggin
2021-06-16 18:08   ` Mathieu Desnoyers
2021-06-16 18:45     ` Andy Lutomirski
2021-06-16  3:21 ` [PATCH 6/8] powerpc/membarrier: Remove special barrier on mm switch Andy Lutomirski
2021-06-16  4:36   ` Nicholas Piggin
2021-06-16  3:21 ` [PATCH 7/8] membarrier: Remove arm (32) support for SYNC_CORE Andy Lutomirski
2021-06-16  9:28   ` Russell King (Oracle)
2021-06-16 10:16   ` Peter Zijlstra
2021-06-16 10:20     ` Peter Zijlstra
2021-06-16 10:34       ` Russell King (Oracle)
2021-06-16 11:10         ` Peter Zijlstra
2021-06-16 13:22           ` Russell King (Oracle)
2021-06-16 15:04             ` Catalin Marinas
2021-06-16 15:23               ` Russell King (Oracle)
2021-06-16 15:45                 ` Catalin Marinas
2021-06-16 16:00                   ` Catalin Marinas
2021-06-16 16:27                     ` Russell King (Oracle)
2021-06-17  8:55                       ` Krzysztof Hałasa
2021-06-18 12:54                       ` Linus Walleij
2021-06-18 13:19                         ` Russell King (Oracle)
2021-06-18 13:36                         ` Arnd Bergmann
2021-06-17 10:40   ` Mark Rutland
2021-06-17 11:23     ` Russell King (Oracle)
2021-06-17 11:33       ` Mark Rutland
2021-06-17 13:41         ` Andy Lutomirski
2021-06-17 13:51           ` Mark Rutland
2021-06-17 14:00             ` Andy Lutomirski
2021-06-17 14:20               ` Mark Rutland
2021-06-17 15:01               ` Peter Zijlstra
2021-06-17 15:13                 ` Peter Zijlstra
2021-06-17 14:16             ` Mathieu Desnoyers
2021-06-17 14:05           ` Peter Zijlstra
2021-06-18  0:07   ` Andy Lutomirski
2021-06-16  3:21 ` [PATCH 8/8] membarrier: Rewrite sync_core_before_usermode() and improve documentation Andy Lutomirski
2021-06-16  4:45   ` Nicholas Piggin
2021-06-16 18:52     ` Andy Lutomirski
2021-06-16 23:48       ` Andy Lutomirski
2021-06-18 15:27       ` Christophe Leroy
2021-06-16 10:20   ` Will Deacon
2021-06-16 23:58     ` Andy Lutomirski
2021-06-17 14:47   ` Mathieu Desnoyers
2021-06-18  0:12     ` Andy Lutomirski
2021-06-18 16:31       ` Mathieu Desnoyers
2021-06-18 19:58         ` Andy Lutomirski
2021-06-18 20:09           ` Mathieu Desnoyers
2021-06-19  6:02             ` Nicholas Piggin
2021-06-19 15:50               ` Andy Lutomirski
2021-06-20  2:10                 ` Nicholas Piggin
2021-06-17 15:16   ` Mathieu Desnoyers
2021-06-18  0:13     ` Andy Lutomirski

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