linux-kernel - Re: [PATCH v2 0/4] more mm switching vs TLB shootdown and lazy tlb fixes

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Date:   Thu, 24 Sep 2020 22:28:10 +1000 (AEST)
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     Nicholas Piggin <npiggin@...il.com>,
        "linux-mm @ kvack . org" <linux-mm@...ck.org>
Cc:     "Aneesh Kumar K . V" <aneesh.kumar@...ux.ibm.com>,
        linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        "David S . Miller" <davem@...emloft.net>,
        sparclinux@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
        linux-arch@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v2 0/4] more mm switching vs TLB shootdown and lazy tlb fixes

On Mon, 14 Sep 2020 14:52:15 +1000, Nicholas Piggin wrote:
> 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.
> 
> [...]

Applied to powerpc/next.

[1/4] mm: fix exec activate_mm vs TLB shootdown and lazy tlb switching race
      https://git.kernel.org/powerpc/c/d53c3dfb23c45f7d4f910c3a3ca84bf0a99c6143
[2/4] powerpc: select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
      https://git.kernel.org/powerpc/c/66acd46080bd9e5ad2be4b0eb1d498d5145d058e
[3/4] sparc64: remove mm_cpumask clearing to fix kthread_use_mm race
      https://git.kernel.org/powerpc/c/bafb056ce27940c9994ea905336aa8f27b4f7275
[4/4] powerpc/64s/radix: Fix mm_cpumask trimming race vs kthread_use_mm
      https://git.kernel.org/powerpc/c/a665eec0a22e11cdde708c1c256a465ebe768047

cheers