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cputime: Generalize CONFIG_VIRT_CPU_ACCOUNTING

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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: Frederic 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>
This commit is contained in:
Frederic Weisbecker 2012-06-16 15:39:34 +02:00
parent c7660994ed
commit b952741c80
5 changed files with 20 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/Kconfig
View File

@ -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"

12
arch/ia64/Kconfig
View File

@ -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

16
arch/powerpc/platforms/Kconfig.cputype
View File

@ -1,6 +1,7 @@
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

5
arch/s390/Kconfig
View File

@ -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

13
init/Kconfig
View File

@ -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