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Message-Id: <cover.1606923183.git.luto@kernel.org>
Date: Wed, 2 Dec 2020 07:35:08 -0800
From: Andy Lutomirski <luto@...nel.org>
To: x86@...nel.org, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc: LKML <linux-kernel@...r.kernel.org>,
Nicholas Piggin <npiggin@...il.com>,
Arnd Bergmann <arnd@...db.de>,
Anton Blanchard <anton@...abs.org>,
Andy Lutomirski <luto@...nel.org>
Subject: [PATCH v2 0/4] membarrier fixes
Hi all-
This is v2, and this time around everything is tagged for -stable.
Changes from v1:
- patch 1: comment fixes from Mathier
- patch 2: improved comments
- patch 3: split out as a separate patch
- patch 4: now has a proper explanation
Mathieu, I think we have to make sync_core sync the caller. See patch 4.
Andy Lutomirski (4):
x86/membarrier: Get rid of a dubious optimization
membarrier: Add an actual barrier before rseq_preempt()
membarrier: Explicitly sync remote cores when SYNC_CORE is requested
membarrier: Execute SYNC_CORE on the calling thread
arch/x86/include/asm/sync_core.h | 9 ++--
arch/x86/mm/tlb.c | 10 ++++-
kernel/sched/membarrier.c | 75 ++++++++++++++++++++++++--------
3 files changed, 71 insertions(+), 23 deletions(-)
--
2.28.0
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