Re: [PATCH v2 0/5] shoot lazy tlbs

[Nicholas Piggin <npiggin@gmail.com>]

I'll ask Andrew to put this in -mm if no objections.

The series now doesn't touch other archs in non-trivial ways, and core code
is functionally not changed much / at all if the option is not selected so
it's actually pretty simple aside from the powerpc change.

Thanks,
Nick

Excerpts from Nicholas Piggin's message of December 14, 2020 4:53 pm:
> This is another rebase, on top of mainline now (don't need the
> asm-generic tree), and without any x86 or membarrier changes.
> This makes the series far smaller and more manageable and
> without the controversial bits.
> 
> Thanks,
> Nick
> 
> Nicholas Piggin (5):
>   lazy tlb: introduce lazy mm refcount helper functions
>   lazy tlb: allow lazy tlb mm switching to be configurable
>   lazy tlb: shoot lazies, a non-refcounting lazy tlb option
>   powerpc: use lazy mm refcount helper functions
>   powerpc/64s: enable MMU_LAZY_TLB_SHOOTDOWN
> 
>  arch/Kconfig                         | 30 ++++++++++
>  arch/arm/mach-rpc/ecard.c            |  2 +-
>  arch/powerpc/Kconfig                 |  1 +
>  arch/powerpc/kernel/smp.c            |  2 +-
>  arch/powerpc/mm/book3s64/radix_tlb.c |  4 +-
>  fs/exec.c                            |  4 +-
>  include/linux/sched/mm.h             | 20 +++++++
>  kernel/cpu.c                         |  2 +-
>  kernel/exit.c                        |  2 +-
>  kernel/fork.c                        | 52 ++++++++++++++++
>  kernel/kthread.c                     | 11 ++--
>  kernel/sched/core.c                  | 88 ++++++++++++++++++++--------
>  kernel/sched/sched.h                 |  4 +-
>  13 files changed, 184 insertions(+), 38 deletions(-)
> 
> -- 
> 2.23.0
> 
>