Merge branch 'timers/core' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into timers/core
Merge updated full dynticks support from Frederic Weisbecker: - support 32-bit systems (full dynticks was 64-bit only before) - support ARM Signed-off-by: Ingo Molnar <mingo@kernel.org>
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commit
19f29887a7
12
arch/Kconfig
12
arch/Kconfig
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@ -353,6 +353,18 @@ config HAVE_CONTEXT_TRACKING
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config HAVE_VIRT_CPU_ACCOUNTING
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bool
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config HAVE_VIRT_CPU_ACCOUNTING_GEN
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bool
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default y if 64BIT
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help
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With VIRT_CPU_ACCOUNTING_GEN, cputime_t becomes 64-bit.
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Before enabling this option, arch code must be audited
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to ensure there are no races in concurrent read/write of
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cputime_t. For example, reading/writing 64-bit cputime_t on
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some 32-bit arches may require multiple accesses, so proper
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locking is needed to protect against concurrent accesses.
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config HAVE_IRQ_TIME_ACCOUNTING
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bool
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help
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@ -54,6 +54,7 @@ config ARM
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select HAVE_REGS_AND_STACK_ACCESS_API
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select HAVE_SYSCALL_TRACEPOINTS
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select HAVE_UID16
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select HAVE_VIRT_CPU_ACCOUNTING_GEN
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select IRQ_FORCED_THREADING
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select KTIME_SCALAR
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select MODULES_USE_ELF_REL
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@ -354,7 +354,8 @@ config VIRT_CPU_ACCOUNTING_NATIVE
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config VIRT_CPU_ACCOUNTING_GEN
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bool "Full dynticks CPU time accounting"
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depends on HAVE_CONTEXT_TRACKING && 64BIT
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depends on HAVE_CONTEXT_TRACKING
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depends on HAVE_VIRT_CPU_ACCOUNTING_GEN
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select VIRT_CPU_ACCOUNTING
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select CONTEXT_TRACKING
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help
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@ -100,7 +100,7 @@ config NO_HZ_FULL
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# RCU_USER_QS dependency
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depends on HAVE_CONTEXT_TRACKING
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# VIRT_CPU_ACCOUNTING_GEN dependency
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depends on 64BIT
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depends on HAVE_VIRT_CPU_ACCOUNTING_GEN
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select NO_HZ_COMMON
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select RCU_USER_QS
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select RCU_NOCB_CPU
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