summaryrefslogtreecommitdiff
path: root/arch/powerpc/Kconfig
diff options
context:
space:
mode:
authorNicholas Piggin <npiggin@gmail.com>2021-05-03 12:17:55 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2021-05-04 04:06:45 +0300
commit8abddd968a303db75e4debe77a3df484164f1f33 (patch)
treeb3ea95c6553f6738df1ca51c25794c701e7f69d0 /arch/powerpc/Kconfig
parent562d1e207d322e6346e8db91bbd11d94f16427d2 (diff)
downloadlinux-8abddd968a303db75e4debe77a3df484164f1f33.tar.xz
powerpc/64s/radix: Enable huge vmalloc mappings
This reduces TLB misses by nearly 30x on a `git diff` workload on a 2-node POWER9 (59,800 -> 2,100) and reduces CPU cycles by 0.54%, due to vfs hashes being allocated with 2MB pages. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210503091755.613393-1-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/Kconfig')
-rw-r--r--arch/powerpc/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 1e6230bea09d..c547a9d6a2dd 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -185,6 +185,7 @@ config PPC
select GENERIC_VDSO_TIME_NS
select HAVE_ARCH_AUDITSYSCALL
select HAVE_ARCH_HUGE_VMAP if PPC_BOOK3S_64 && PPC_RADIX_MMU
+ select HAVE_ARCH_HUGE_VMALLOC if HAVE_ARCH_HUGE_VMAP
select HAVE_ARCH_JUMP_LABEL
select HAVE_ARCH_JUMP_LABEL_RELATIVE
select HAVE_ARCH_KASAN if PPC32 && PPC_PAGE_SHIFT <= 14