748e0d8ffb
背景：同一个进程的多个线程读写同一个PTE时，由于PTE无保护，存在竞态问题。 方案：新增spinlock保护PTE，包括大锁跟小锁。大锁：一个进程只有一个spinlock锁，多个线程 读写PTE时竞争一把锁，锁的内存占用小，但系统性能降低；小锁：每个页表持有一把spinlock， 由于锁是page结构体的一个字段，内存消耗较大，但是相对大锁性能较优。系统默认使用大锁,用 户可根据具体需要配置使用大锁还是小锁。 close #I2WARC Signed-off-by: Haryslee <lihao189@huawei.com> Change-Id: I5612eeac1f65507160035eae16af61f285182eda
74 lines
1.7 KiB
Plaintext
74 lines
1.7 KiB
Plaintext
menu "Kernel"
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config KERNEL_SMP
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bool "Enable Kernel SMP"
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default n
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help
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This option will enable smp support of LiteOS.
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config KERNEL_SMP_CORE_NUM
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int "Multi-processing Core Numbers"
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default 2
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depends on KERNEL_SMP
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help
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This represents the number of multi-processing cores.
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config KERNEL_SMP_LOCKDEP
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bool "Enable Spinlock Lockdep Check"
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default n
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depends on KERNEL_SMP
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help
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This option will enable spinlock lockdep check.
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config KERNEL_SMP_TASK_SYNC
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bool "Enable Synchronized Task Operations"
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default n
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depends on KERNEL_SMP
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help
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This option will enable task synchronized operate task across cores.
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config KERNEL_SMP_CALL
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bool "Enable Function call cross Multi-core"
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default n
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depends on KERNEL_SMP
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help
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This option will enable function call on multi-core.
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config KERNEL_SCHED_STATISTICS
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bool "Enable Scheduler statistics"
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default n
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depends on KERNEL_SMP
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help
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This option will enable scheduler statistics.
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config KERNEL_MMU
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bool "Enable MMU"
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default y
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help
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This option will enable mmu.
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config KERNEL_VM
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bool "Enable VM"
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default y
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depends on KERNEL_MMU
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help
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This option will enable vmm, pmm, page fault, etc.
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config KERNEL_SYSCALL
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bool "Enable Syscall"
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default y
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depends on KERNEL_VM
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help
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This option will enable syscall.
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config PAGE_TABLE_FINE_LOCK
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bool "Enable fine lock for page table"
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default n
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depends on KERNEL_VM
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help
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This option will enable fine lock for page table.
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######################### config options of extended #####################
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source "kernel/extended/Kconfig"
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endmenu
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