From: Qi Zheng <[email protected]> The PT_RECLAIM can work on all architectures that support MMU_GATHER_RCU_TABLE_FREE, so make PT_RECLAIM depends on MMU_GATHER_RCU_TABLE_FREE.
BTW, change PT_RECLAIM to be enabled by default, since nobody should want to turn it off. Signed-off-by: Qi Zheng <[email protected]> --- arch/x86/Kconfig | 1 - mm/Kconfig | 9 ++------- 2 files changed, 2 insertions(+), 8 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 80527299f859a..0d22da56a71b0 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -331,7 +331,6 @@ config X86 select FUNCTION_ALIGNMENT_4B imply IMA_SECURE_AND_OR_TRUSTED_BOOT if EFI select HAVE_DYNAMIC_FTRACE_NO_PATCHABLE - select ARCH_SUPPORTS_PT_RECLAIM if X86_64 select ARCH_SUPPORTS_SCHED_SMT if SMP select SCHED_SMT if SMP select ARCH_SUPPORTS_SCHED_CLUSTER if SMP diff --git a/mm/Kconfig b/mm/Kconfig index bd0ea5454af82..fc00b429b7129 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -1447,14 +1447,9 @@ config ARCH_HAS_USER_SHADOW_STACK The architecture has hardware support for userspace shadow call stacks (eg, x86 CET, arm64 GCS or RISC-V Zicfiss). -config ARCH_SUPPORTS_PT_RECLAIM - def_bool n - config PT_RECLAIM - bool "reclaim empty user page table pages" - default y - depends on ARCH_SUPPORTS_PT_RECLAIM && MMU && SMP - select MMU_GATHER_RCU_TABLE_FREE + def_bool y + depends on MMU_GATHER_RCU_TABLE_FREE help Try to reclaim empty user page table pages in paths other than munmap and exit_mmap path. -- 2.20.1
