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[61.68.212.105]) by smtp.gmail.com with ESMTPSA id 78sm1068608pfv.200.2020.08.28.03.00.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Aug 2020 03:00:32 -0700 (PDT) From: Nicholas Piggin To: linux-mm@kvack.org Cc: Nicholas Piggin , linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, "Aneesh Kumar K.V" , Andrew Morton , Jens Axboe , Peter Zijlstra , "David S. Miller" Subject: [PATCH 0/4] more mm switching vs TLB shootdown and lazy tlb Date: Fri, 28 Aug 2020 20:00:18 +1000 Message-Id: <20200828100022.1099682-1-npiggin@gmail.com> X-Mailer: git-send-email 2.23.0 MIME-Version: 1.0 X-Rspamd-Queue-Id: B13AC100EC695 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam04 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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(-) --=20 2.23.0