[PATCH 0/2] arm64/mm: Enable color zero pages
Gavin Shan
gshan at redhat.com
Tue Sep 15 23:25:21 EDT 2020
The feature of color zero pages isn't enabled on arm64, meaning all
read-only (anonymous) VM areas are backed up by same zero page. It
leads pressure to L1 (data) cache on reading data from them. This
tries to enable color zero pages.
PATCH[1/2] decouples the zero PGD table from zero page
PATCH[2/2] allocates the needed zero pages according to L1 cache size
Gavin Shan (2):
arm64/mm: Introduce zero PGD table
arm64/mm: Enable color zero pages
arch/arm64/include/asm/cache.h | 22 +++++++++++++++++
arch/arm64/include/asm/mmu_context.h | 6 ++---
arch/arm64/include/asm/pgtable.h | 11 +++++++--
arch/arm64/kernel/cacheinfo.c | 34 +++++++++++++++++++++++++++
arch/arm64/kernel/setup.c | 2 +-
arch/arm64/kernel/vmlinux.lds.S | 4 ++++
arch/arm64/mm/init.c | 35 ++++++++++++++++++++++++++++
arch/arm64/mm/mmu.c | 7 ------
arch/arm64/mm/proc.S | 2 +-
9 files changed, 109 insertions(+), 14 deletions(-)
--
2.23.0
More information about the linux-arm-kernel
mailing list