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kernel-ark/arch/powerpc/configs/pasemi_defconfig
Frederic Weisbecker abf917cd91 cputime: Generic on-demand virtual cputime accounting 
If we want to stop the tick further idle, we need to be
able to account the cputime without using the tick.

Virtual based cputime accounting solves that problem by
hooking into kernel/user boundaries.

However implementing CONFIG_VIRT_CPU_ACCOUNTING require
low level hooks and involves more overhead. But we already
have a generic context tracking subsystem that is required
for RCU needs by archs which plan to shut down the tick
outside idle.

This patch implements a generic virtual based cputime
accounting that relies on these generic kernel/user hooks.

There are some upsides of doing this:

- This requires no arch code to implement CONFIG_VIRT_CPU_ACCOUNTING
if context tracking is already built (already necessary for RCU in full
tickless mode).

- We can rely on the generic context tracking subsystem to dynamically
(de)activate the hooks, so that we can switch anytime between virtual
and tick based accounting. This way we don't have the overhead
of the virtual accounting when the tick is running periodically.

And one downside:

- There is probably more overhead than a native virtual based cputime
accounting. But this relies on hooks that are already set anyway.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Li Zhong <zhong@linux.vnet.ibm.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
2013-01-27 19:23:27 +01:00

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CONFIG_PPC64=y
CONFIG_ALTIVEC=y
CONFIG_SMP=y
CONFIG_NR_CPUS=2
CONFIG_EXPERIMENTAL=y
CONFIG_SYSVIPC=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_PROFILING=y
CONFIG_OPROFILE=y
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
# CONFIG_BLK_DEV_BSG is not set
CONFIG_PARTITION_ADVANCED=y
CONFIG_MAC_PARTITION=y
# CONFIG_PPC_PSERIES is not set
# CONFIG_PPC_PMAC is not set
CONFIG_PPC_PASEMI=y
CONFIG_PPC_PASEMI_IOMMU=y
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_GOV_POWERSAVE=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_ONDEMAND=y
CONFIG_HZ_1000=y
CONFIG_PPC_64K_PAGES=y
# CONFIG_SECCOMP is not set
CONFIG_PCI_MSI=y
CONFIG_PCCARD=y
CONFIG_ELECTRA_CF=y
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_XFRM_USER=y
CONFIG_NET_KEY=y
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
CONFIG_IP_PNP_RARP=y
CONFIG_NET_IPIP=y
CONFIG_SYN_COOKIES=y
CONFIG_INET_AH=y
CONFIG_INET_ESP=y
# CONFIG_IPV6 is not set
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_MTD=y
CONFIG_MTD_CHAR=y
CONFIG_MTD_BLOCK=y
CONFIG_MTD_SLRAM=y
CONFIG_MTD_PHRAM=y
CONFIG_MTD_NAND=y
CONFIG_MTD_NAND_PASEMI=y
CONFIG_PROC_DEVICETREE=y
CONFIG_BLK_DEV_LOOP=y
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_SIZE=16384
CONFIG_EEPROM_LEGACY=y
CONFIG_IDE=y
CONFIG_BLK_DEV_IDECD=y
CONFIG_IDE_TASK_IOCTL=y
CONFIG_BLK_DEV_SD=y
CONFIG_CHR_DEV_ST=y
CONFIG_CHR_DEV_OSST=y
CONFIG_BLK_DEV_SR=y
CONFIG_BLK_DEV_SR_VENDOR=y
CONFIG_CHR_DEV_SG=y
CONFIG_CHR_DEV_SCH=y
CONFIG_SCSI_MULTI_LUN=y
CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_LOGGING=y
CONFIG_ATA=y
CONFIG_SATA_SIL24=y
CONFIG_SATA_MV=y
CONFIG_PATA_PCMCIA=y
CONFIG_PATA_PLATFORM=y
CONFIG_PATA_OF_PLATFORM=y
CONFIG_ATA_GENERIC=y
CONFIG_MD=y
CONFIG_BLK_DEV_MD=y
CONFIG_MD_LINEAR=y
CONFIG_MD_RAID0=y
CONFIG_MD_RAID1=y
CONFIG_MD_RAID10=y
CONFIG_MD_RAID456=y
CONFIG_BLK_DEV_DM=y
CONFIG_DM_CRYPT=y
CONFIG_NETDEVICES=y
CONFIG_DUMMY=y
CONFIG_MII=y
CONFIG_TIGON3=y
CONFIG_E1000=y
CONFIG_PASEMI_MAC=y
CONFIG_MARVELL_PHY=y
CONFIG_INPUT_JOYDEV=y
CONFIG_INPUT_EVDEV=y
# CONFIG_KEYBOARD_ATKBD is not set
# CONFIG_MOUSE_PS2 is not set
# CONFIG_SERIO is not set
CONFIG_LEGACY_PTY_COUNT=4
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_HW_RANDOM=y
CONFIG_RAW_DRIVER=y
CONFIG_I2C_CHARDEV=y
CONFIG_I2C_PASEMI=y
CONFIG_SENSORS_LM85=y
CONFIG_SENSORS_LM90=y
CONFIG_DRM=y
CONFIG_DRM_RADEON=y
CONFIG_FIRMWARE_EDID=y
CONFIG_FB_TILEBLITTING=y
CONFIG_FB_VGA16=y
CONFIG_FB_NVIDIA=y
CONFIG_FB_NVIDIA_I2C=y
CONFIG_FB_RADEON=y
# CONFIG_LCD_CLASS_DEVICE is not set
CONFIG_VGACON_SOFT_SCROLLBACK=y
CONFIG_LOGO=y
CONFIG_SOUND=y
CONFIG_SND=y
CONFIG_SND_SEQUENCER=y
CONFIG_SND_MIXER_OSS=y
CONFIG_SND_PCM_OSS=y
CONFIG_SND_SEQUENCER_OSS=y
CONFIG_SND_USB_AUDIO=y
CONFIG_SND_USB_USX2Y=y
CONFIG_HID_DRAGONRISE=y
CONFIG_HID_GYRATION=y
CONFIG_HID_TWINHAN=y
CONFIG_HID_NTRIG=y
CONFIG_HID_PANTHERLORD=y
CONFIG_HID_PETALYNX=y
CONFIG_HID_SAMSUNG=y
CONFIG_HID_SONY=y
CONFIG_HID_SUNPLUS=y
CONFIG_HID_GREENASIA=y
CONFIG_HID_SMARTJOYPLUS=y
CONFIG_HID_TOPSEED=y
CONFIG_HID_THRUSTMASTER=y
CONFIG_HID_ZEROPLUS=y
CONFIG_USB=y
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_OHCI_HCD=y
CONFIG_USB_UHCI_HCD=y
CONFIG_USB_SL811_HCD=y
CONFIG_USB_STORAGE=y
CONFIG_EDAC=y
CONFIG_EDAC_MM_EDAC=y
CONFIG_EDAC_PASEMI=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_DRV_DS1307=y
CONFIG_EXT2_FS=y
CONFIG_EXT2_FS_XATTR=y
CONFIG_EXT2_FS_POSIX_ACL=y
CONFIG_EXT3_FS=y
# CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
CONFIG_AUTOFS4_FS=y
CONFIG_ISO9660_FS=y
CONFIG_UDF_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_PROC_KCORE=y
CONFIG_TMPFS=y
CONFIG_HUGETLBFS=y
CONFIG_CONFIGFS_FS=y
CONFIG_JFFS2_FS=y
CONFIG_NFS_FS=y
CONFIG_ROOT_NFS=y
CONFIG_NFSD=y
CONFIG_NFSD_V4=y
CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_ISO8859_1=y
CONFIG_CRC_CCITT=y
CONFIG_PRINTK_TIME=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_FS=y
CONFIG_DEBUG_KERNEL=y
CONFIG_DETECT_HUNG_TASK=y
# CONFIG_SCHED_DEBUG is not set
CONFIG_XMON=y
CONFIG_XMON_DEFAULT=y
CONFIG_CRYPTO_MD4=y
CONFIG_CRYPTO_SHA256=y
CONFIG_CRYPTO_SHA512=y
CONFIG_CRYPTO_BLOWFISH=y
# CONFIG_CRYPTO_ANSI_CPRNG is not set
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