powerpc/64s/radix: occasionally attempt to trim mm_cpumask

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A single-threaded process that is flushing its own address space is
so far the only case where the mm_cpumask is attempted to be trimmed.
This patch expands that to flush in other situations, multi-threaded
processes and external sources. For now it's a relatively simple
occasional trim attempt. The main aim is to add the mechanism,
tweaking and tuning can come with more data.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201217134731.488135-6-npiggin@gmail.com

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Nicholas Piggin 2020-12-17 23:47:29 +10:00 • committed by Michael Ellerman

parent 780de40601

commit 9393544842

1 changed files with 56 additions and 4 deletions

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arch/powerpc/mm/book3s64/radix_tlb.c

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