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Commit b952741c authored by Frederic Weisbecker's avatar Frederic Weisbecker
Browse files

cputime: Generalize CONFIG_VIRT_CPU_ACCOUNTING 



S390, ia64 and powerpc all define their own version
of CONFIG_VIRT_CPU_ACCOUNTING. Generalize the config
and its description to a single place to avoid
duplication.

Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
parent c7660994

arch/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -281,4 +281,7 @@ config SECCOMP_FILTER 


	  See Documentation/prctl/seccomp_filter.txt for details.



config HAVE_VIRT_CPU_ACCOUNTING

	bool



source "kernel/gcov/Kconfig"

arch/ia64/Kconfig

+1 −11
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ config IA64 
	select HAVE_GENERIC_HARDIRQS

	select HAVE_MEMBLOCK

	select HAVE_MEMBLOCK_NODE_MAP

	select HAVE_VIRT_CPU_ACCOUNTING

	select ARCH_DISCARD_MEMBLOCK

	select GENERIC_IRQ_PROBE

	select GENERIC_PENDING_IRQ if SMP
@@ -340,17 +341,6 @@ config FORCE_MAX_ZONEORDER 
	default "17" if HUGETLB_PAGE

	default "11"



config VIRT_CPU_ACCOUNTING

	bool "Deterministic task and CPU time accounting"

	default n

	help

	  Select this option to enable more accurate task and CPU time

	  accounting.  This is done by reading a CPU counter on each

	  kernel entry and exit and on transitions within the kernel

	  between system, softirq and hardirq state, so there is a

	  small performance impact.

	  If in doubt, say N here.



config SMP

	bool "Symmetric multi-processing support"

	select USE_GENERIC_SMP_HELPERS

arch/powerpc/platforms/Kconfig.cputype

+1 −15
Original line number Diff line number Diff line 
config PPC64

	bool "64-bit kernel"

	default n

	select HAVE_VIRT_CPU_ACCOUNTING

	help

	  This option selects whether a 32-bit or a 64-bit kernel

	  will be built.
@@ -337,21 +338,6 @@ config PPC_MM_SLICES 
	default y if (!PPC_FSL_BOOK3E && PPC64 && HUGETLB_PAGE) || (PPC_STD_MMU_64 && PPC_64K_PAGES)

	default n



config VIRT_CPU_ACCOUNTING

	bool "Deterministic task and CPU time accounting"

	depends on PPC64

	default y

	help

	  Select this option to enable more accurate task and CPU time

	  accounting.  This is done by reading a CPU counter on each

	  kernel entry and exit and on transitions within the kernel

	  between system, softirq and hardirq state, so there is a

	  small performance impact.  This also enables accounting of

	  stolen time on logically-partitioned systems running on

	  IBM POWER5-based machines.



	  If in doubt, say Y here.



config PPC_HAVE_PMU_SUPPORT

       bool

arch/s390/Kconfig

+2 −3
Original line number Diff line number Diff line
@@ -49,9 +49,6 @@ config GENERIC_LOCKBREAK 
config PGSTE

	def_bool y if KVM



config VIRT_CPU_ACCOUNTING

	def_bool y



config ARCH_SUPPORTS_DEBUG_PAGEALLOC

	def_bool y
@@ -89,6 +86,8 @@ config S390 
	select HAVE_MEMBLOCK

	select HAVE_MEMBLOCK_NODE_MAP

	select HAVE_CMPXCHG_LOCAL

	select HAVE_VIRT_CPU_ACCOUNTING

	select VIRT_CPU_ACCOUNTING

	select ARCH_DISCARD_MEMBLOCK

	select BUILDTIME_EXTABLE_SORT

	select ARCH_INLINE_SPIN_TRYLOCK

init/Kconfig

+13 −0
Original line number Diff line number Diff line
@@ -267,6 +267,19 @@ config POSIX_MQUEUE_SYSCTL 
	depends on SYSCTL

	default y



config VIRT_CPU_ACCOUNTING

	bool "Deterministic task and CPU time accounting"

	depends on HAVE_VIRT_CPU_ACCOUNTING

	default y if PPC64

	help

	  Select this option to enable more accurate task and CPU time

	  accounting.  This is done by reading a CPU counter on each

	  kernel entry and exit and on transitions within the kernel

	  between system, softirq and hardirq state, so there is a

	  small performance impact.  In the case of s390 or IBM POWER > 5,

	  this also enables accounting of stolen time on logically-partitioned

	  systems.



config BSD_PROCESS_ACCT

	bool "BSD Process Accounting"

	help