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

Michael Ellerman
2020-09-24T12:28:15Z

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