From 7c5c723ed1f3363986788512f35c84f85173f906 Mon Sep 17 00:00:00 2001 From: Jisheng Zhang Date: Sat, 25 Nov 2023 16:21:43 +0800 Subject: [PATCH] riscv: select ARCH_USE_CMPXCHG_LOCKREF Select ARCH_USE_CMPXCHG_LOCKREF to enable the cmpxchg-based lockless lockref implementation for riscv. Using Linus' test case[1] on TH1520 platform, I see a 11.2% improvement. On JH7110 platform, I see 12.0% improvement. Link: http://marc.info/?l=linux-fsdevel&m=137782380714721&w=4 [1] Signed-off-by: Jisheng Zhang (cherry picked from commit 186355454e915e2ef9897127c495edbe4959c82e) Signed-off-by: Jaehoon Chung --- arch/riscv/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 720f7a351e43..ef3b0502bcff 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -35,6 +35,7 @@ config RISCV select ARCH_KEEP_MEMBLOCK select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT + select ARCH_USE_CMPXCHG_LOCKREF select ARCH_USE_QUEUED_SPINLOCKS select ARCH_USE_QUEUED_RWLOCKS select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU -- 2.34.1