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powerpc/mm: Allow ARCH_FORCE_MAX_ORDER up to 12

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Christophe reported that the change to ARCH_FORCE_MAX_ORDER to limit the
range to 10 had broken his ability to configure hugepages:

  # echo 1 > /sys/kernel/mm/hugepages/hugepages-8192kB/nr_hugepages
  sh: write error: Invalid argument

Several of the powerpc defconfigs previously set the
ARCH_FORCE_MAX_ORDER value to 12, via the definition in
arch/powerpc/configs/fsl-emb-nonhw.config, used by:

  mpc85xx_defconfig
  mpc85xx_smp_defconfig
  corenet32_smp_defconfig
  corenet64_smp_defconfig
  mpc86xx_defconfig
  mpc86xx_smp_defconfig

Fix it by increasing the allowed range to 12 to restore the previous
behaviour.

Fixes: 358e526a1648 ("powerpc/mm: Reinstate ARCH_FORCE_MAX_ORDER ranges")
Reported-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Closes: https://lore.kernel.org/all/8011d806-5b30-bf26-2bfe-a08c39d57e20@csgroup.eu/
Tested-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230824122849.942072-1-mpe@ellerman.id.au
This commit is contained in:
Michael Ellerman 2023-08-24 22:28:49 +10:00
parent f0eee815ba
commit ff9e8f4151
1 changed files with 1 additions and 1 deletions
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arch/powerpc/Kconfig
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@ -910,7 +910,7 @@ config ARCH_FORCE_MAX_ORDER
default "6" if PPC32 && PPC_64K_PAGES default "6" if PPC32 && PPC_64K_PAGES
range 4 10 if PPC32 && PPC_256K_PAGES range 4 10 if PPC32 && PPC_256K_PAGES
default "4" if PPC32 && PPC_256K_PAGES default "4" if PPC32 && PPC_256K_PAGES
range 10 10 range 10 12
default "10" default "10"
help help
The kernel page allocator limits the size of maximal physically The kernel page allocator limits the size of maximal physically