This is a note to let you know that I've just added the patch titled
powerpc/mm: Allow ARCH_FORCE_MAX_ORDER up to 12
to the 6.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
powerpc-mm-allow-arch_force_max_order-up-to-12.patch
and it can be found in the queue-6.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 3f537e2dcbb231ee27108a132ad1b439be47d040
Author: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Date: Thu Aug 24 22:28:49 2023 +1000
powerpc/mm: Allow ARCH_FORCE_MAX_ORDER up to 12
[ Upstream commit ff9e8f41513669e290f6e1904e1bc75950584491 ]
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@xxxxxxxxxx>
Closes: https://lore.kernel.org/all/8011d806-5b30-bf26-2bfe-a08c39d57e20@xxxxxxxxxx/
Tested-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://msgid.link/20230824122849.942072-1-mpe@xxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 0b1172cbeccb3..b3fdb3d268367 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -917,7 +917,7 @@ config ARCH_FORCE_MAX_ORDER
default "6" if PPC32 && PPC_64K_PAGES
range 4 10 if PPC32 && PPC_256K_PAGES
default "4" if PPC32 && PPC_256K_PAGES
- range 10 10
+ range 10 12
default "10"
help
The kernel page allocator limits the size of maximal physically
