From: Huacai Chen Date: Tue, 14 May 2024 04:24:18 +0000 (+0800) Subject: LoongArch: Select THP_SWAP if HAVE_ARCH_TRANSPARENT_HUGEPAGE X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=ff4a2443ef88874943f6d8444fb86327ec6f96b0;p=linux.git LoongArch: Select THP_SWAP if HAVE_ARCH_TRANSPARENT_HUGEPAGE THP_SWAP has been proven to improve the swap throughput significantly on x86_64 system according to commit bd4c82c22c367e0 ("mm, THP, swap: delay splitting THP after swapped out"), on ARM64 system according to commit d0637c505f8a1d ("arm64: enable THP_SWAP for arm64") and on RISC-V system according to commit 87f81e66e2e84c7 ("riscv: enable THP_SWAP for RV64"). Enable THP_SWAP for LoongArch, testing the micro-benchmark which is introduced by commit d0637c505f8a1d ("arm64: enable THP_SWAP for arm64") shows below numbers on the Loongson-3A5000 board: swp out bandwidth w/o patch: 1815716 bytes/ms (mean of 10 tests) swp out bandwidth w/ patch: 3410003 bytes/ms (mean of 10 tests) Improved by 46.75%! Signed-off-by: Huacai Chen --- diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 24bce573dc2b4..e22330064e98a 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -70,6 +70,7 @@ config LOONGARCH select ARCH_WANT_LD_ORPHAN_WARN select ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP select ARCH_WANTS_NO_INSTR + select ARCH_WANTS_THP_SWAP if HAVE_ARCH_TRANSPARENT_HUGEPAGE select BUILDTIME_TABLE_SORT select COMMON_CLK select CPU_PM