diff options
| author | Jisheng Zhang <jszhang@kernel.org> | 2024-03-25 19:10:37 +0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2024-04-24 12:57:48 -0700 |
| commit | eb1e5037294652ddf1437f62292c0727183f11ae (patch) | |
| tree | 721019ce93d3ea79aed7a71fdd8f3e5d8dd0ace8 /arch/riscv/Kconfig | |
| parent | 6613476e225e090cc9aad49be7fa504e290dd33d (diff) | |
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 <jszhang@kernel.org>
Reviewed-by: Andrea Parri <parri.andrea@gmail.com>
Link: https://lore.kernel.org/r/20240325111038.1700-2-jszhang@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/Kconfig')
| -rw-r--r-- | arch/riscv/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index bffbd869a068..b8b96baad058 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -50,6 +50,7 @@ config RISCV select ARCH_SUPPORTS_PAGE_TABLE_CHECK if MMU select ARCH_SUPPORTS_PER_VMA_LOCK if MMU select ARCH_SUPPORTS_SHADOW_CALL_STACK if HAVE_SHADOW_CALL_STACK + select ARCH_USE_CMPXCHG_LOCKREF if 64BIT select ARCH_USE_MEMTEST select ARCH_USE_QUEUED_RWLOCKS select ARCH_USES_CFI_TRAPS if CFI_CLANG |