From: Qi Zheng <[email protected]> Make PT_RECLAIM depend on MMU_GATHER_RCU_TABLE_FREE so that PT_RECLAIM can be enabled by default on all architectures that support MMU_GATHER_RCU_TABLE_FREE.
Considering that a large number of PTE page table pages (such as 100GB+) can only be caused on a 64-bit system, let PT_RECLAIM also depend on 64BIT. Signed-off-by: Qi Zheng <[email protected]> --- arch/x86/Kconfig | 1 - mm/Kconfig | 6 +----- 2 files changed, 1 insertion(+), 6 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index eac2e86056902..96bff81fd4787 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -330,7 +330,6 @@ 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 a5a90b169435d..e795fbd69e50c 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -1440,14 +1440,10 @@ 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 + depends on MMU_GATHER_RCU_TABLE_FREE && MMU && SMP && 64BIT help Try to reclaim empty user page table pages in paths other than munmap and exit_mmap path. -- 2.20.1
