From: Nicholas Piggin <npiggin@gmail.com>
To: linux-mm@kvack.org
Cc: Nicholas Piggin <npiggin@gmail.com>,
linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Jens Axboe <axboe@kernel.dk>,
Peter Zijlstra <peterz@infradead.org>,
"David S. Miller" <davem@davemloft.net>
Subject: [PATCH 0/4] more mm switching vs TLB shootdown and lazy tlb
Date: Fri, 28 Aug 2020 20:00:18 +1000 [thread overview]
Message-ID: <20200828100022.1099682-1-npiggin@gmail.com> (raw)
This is an attempt to fix a few different related issues around
switching mm, TLB flushing, and lazy tlb mm handling.
This will require all architectures to eventually move to disabling
irqs over activate_mm, but it's possible we could add another arch
call after irqs are re-enabled for those few which can't do their
entire activation with irqs disabled.
I'd like some feedback on the sparc/powerpc vs kthread_use_mm
problem too.
Thanks,
Nick
Nicholas Piggin (4):
mm: fix exec activate_mm vs TLB shootdown and lazy tlb switching race
powerpc: select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
sparc64: remove mm_cpumask clearing to fix kthread_use_mm race
powerpc/64s/radix: Fix mm_cpumask trimming race vs kthread_use_mm
arch/Kconfig | 7 +++
arch/powerpc/Kconfig | 1 +
arch/powerpc/include/asm/mmu_context.h | 2 +-
arch/powerpc/include/asm/tlb.h | 13 ------
arch/powerpc/mm/book3s64/radix_tlb.c | 23 ++++++---
arch/sparc/kernel/smp_64.c | 65 ++++++--------------------
fs/exec.c | 17 ++++++-
7 files changed, 54 insertions(+), 74 deletions(-)
--
2.23.0
next reply other threads:[~2020-08-28 10:00 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-28 10:00 Nicholas Piggin [this message]
2020-08-28 10:00 ` [PATCH 1/4] mm: fix exec activate_mm vs TLB shootdown and lazy tlb switching race Nicholas Piggin
2020-08-28 11:15 ` peterz
2020-08-31 1:25 ` Nicholas Piggin
2020-08-28 10:00 ` [PATCH 2/4] powerpc: select ARCH_WANT_IRQS_OFF_ACTIVATE_MM Nicholas Piggin
2020-08-28 10:00 ` [PATCH 3/4] sparc64: remove mm_cpumask clearing to fix kthread_use_mm race Nicholas Piggin
2020-08-28 10:00 ` [PATCH 4/4] powerpc/64s/radix: Fix mm_cpumask trimming race vs kthread_use_mm Nicholas Piggin
2020-09-01 12:00 ` Michael Ellerman
2020-09-02 9:48 ` Nicholas Piggin
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