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powerpc: select CPUMASK_OFFSTACK if NR_CPUS >= 8192

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Some core kernel code starts to go beyond the 2048 byte stack size
warning at NR_CPUS=8192, so select CPUMASK_OFFSTACK in that case.
x86 does similarly for very large NR_CPUS.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211105035042.1398309-2-npiggin@gmail.com
This commit is contained in:
Nicholas Piggin
2021-11-29 22:48:32 +11:00
committed by Michael Ellerman
parent b350111bf7
commit 2eafc4748b
1 changed files with 1 additions and 0 deletions
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arch/powerpc/Kconfig
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@@ -165,6 +165,7 @@ config PPC
select BINFMT_ELF
select BUILDTIME_TABLE_SORT
select CLONE_BACKWARDS
select CPUMASK_OFFSTACK if NR_CPUS >= 8192
select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
select DMA_OPS_BYPASS if PPC64
select DMA_OPS if PPC64