From: Andy Lutomirski <luto@kernel.org>
To: x86@kernel.org, Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Nicholas Piggin <npiggin@gmail.com>,
Arnd Bergmann <arnd@arndb.de>, Anton Blanchard <anton@ozlabs.org>,
Andy Lutomirski <luto@kernel.org>
Subject: [PATCH v3 0/4] membarrier fixes
Date: Thu, 3 Dec 2020 21:07:02 -0800 [thread overview]
Message-ID: <cover.1607058304.git.luto@kernel.org> (raw)
Various membarrier fixes.
Changes from v2:
- Added reviewed-bys
- Don't rseq_preempt the caller (Mathieu)
- Fix single-thread short circuit (Mathieu)
Changes from v1:
- patch 1: comment fixes from Mathieu
- 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 | 77 ++++++++++++++++++++++++--------
3 files changed, 72 insertions(+), 24 deletions(-)
--
2.28.0
next reply other threads:[~2020-12-04 5:07 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-04 5:07 Andy Lutomirski [this message]
2020-12-04 5:07 ` [PATCH v3 1/4] x86/membarrier: Get rid of a dubious optimization Andy Lutomirski
2020-12-09 4:10 ` Andy Lutomirski
2020-12-09 8:42 ` [tip: x86/urgent] " tip-bot2 for Andy Lutomirski
2020-12-04 5:07 ` [PATCH v3 2/4] membarrier: Add an actual barrier before rseq_preempt() Andy Lutomirski
2020-12-09 4:12 ` Andy Lutomirski
2020-12-09 8:42 ` [tip: x86/urgent] " tip-bot2 for Andy Lutomirski
2020-12-14 18:05 ` Andy Lutomirski
2020-12-04 5:07 ` [PATCH v3 3/4] membarrier: Explicitly sync remote cores when SYNC_CORE is requested Andy Lutomirski
2020-12-09 4:13 ` Andy Lutomirski
2020-12-09 8:42 ` [tip: x86/urgent] " tip-bot2 for Andy Lutomirski
2020-12-04 5:07 ` [PATCH v3 4/4] membarrier: Execute SYNC_CORE on the calling thread Andy Lutomirski
2020-12-04 19:35 ` Mathieu Desnoyers
2020-12-09 4:15 ` Andy Lutomirski
2020-12-09 8:42 ` [tip: x86/urgent] " tip-bot2 for Andy Lutomirski
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