![Matt Helsley](/assets/img/avatar_default.png)
This patch implements a new freezer subsystem in the control groups framework. It provides a way to stop and resume execution of all tasks in a cgroup by writing in the cgroup filesystem. The freezer subsystem in the container filesystem defines a file named freezer.state. Writing "FROZEN" to the state file will freeze all tasks in the cgroup. Subsequently writing "RUNNING" will unfreeze the tasks in the cgroup. Reading will return the current state. * Examples of usage : # mkdir /containers/freezer # mount -t cgroup -ofreezer freezer /containers # mkdir /containers/0 # echo $some_pid > /containers/0/tasks to get status of the freezer subsystem : # cat /containers/0/freezer.state RUNNING to freeze all tasks in the container : # echo FROZEN > /containers/0/freezer.state # cat /containers/0/freezer.state FREEZING # cat /containers/0/freezer.state FROZEN to unfreeze all tasks in the container : # echo RUNNING > /containers/0/freezer.state # cat /containers/0/freezer.state RUNNING This is the basic mechanism which should do the right thing for user space task in a simple scenario. It's important to note that freezing can be incomplete. In that case we return EBUSY. This means that some tasks in the cgroup are busy doing something that prevents us from completely freezing the cgroup at this time. After EBUSY, the cgroup will remain partially frozen -- reflected by freezer.state reporting "FREEZING" when read. The state will remain "FREEZING" until one of these things happens: 1) Userspace cancels the freezing operation by writing "RUNNING" to the freezer.state file 2) Userspace retries the freezing operation by writing "FROZEN" to the freezer.state file (writing "FREEZING" is not legal and returns EIO) 3) The tasks that blocked the cgroup from entering the "FROZEN" state disappear from the cgroup's set of tasks. [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: export thaw_process] Signed-off-by: Cedric Le Goater <clg@fr.ibm.com> Signed-off-by: Matt Helsley <matthltc@us.ibm.com> Acked-by: Serge E. Hallyn <serue@us.ibm.com> Tested-by: Matt Helsley <matthltc@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
689 lines
16 KiB
Text
689 lines
16 KiB
Text
#
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# For a description of the syntax of this configuration file,
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# see the Configure script.
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#
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mainmenu "Linux/CRIS Kernel Configuration"
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config MMU
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bool
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default y
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config ZONE_DMA
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bool
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default y
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config RWSEM_GENERIC_SPINLOCK
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bool
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default y
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config RWSEM_XCHGADD_ALGORITHM
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bool
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config GENERIC_IOMAP
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bool
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default y
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config ARCH_HAS_ILOG2_U32
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bool
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default n
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config ARCH_HAS_ILOG2_U64
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bool
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default n
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config GENERIC_FIND_NEXT_BIT
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bool
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default y
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config GENERIC_HWEIGHT
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bool
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default y
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config GENERIC_CALIBRATE_DELAY
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bool
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default y
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config NO_IOPORT
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def_bool y
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config FORCE_MAX_ZONEORDER
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int
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default 6
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config CRIS
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bool
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default y
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select HAVE_IDE
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config HZ
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int
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default 100
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source "init/Kconfig"
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source "kernel/Kconfig.freezer"
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menu "General setup"
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source "fs/Kconfig.binfmt"
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config GENERIC_HARDIRQS
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bool
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default y
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config ETRAX_CMDLINE
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string "Kernel command line"
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default "root=/dev/mtdblock3"
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help
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Pass additional commands to the kernel.
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config ETRAX_WATCHDOG
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bool "Enable ETRAX watchdog"
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help
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Enable the built-in watchdog timer support on ETRAX based embedded
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network computers.
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config ETRAX_WATCHDOG_NICE_DOGGY
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bool "Disable watchdog during Oops printouts"
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depends on ETRAX_WATCHDOG
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help
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By enabling this you make sure that the watchdog does not bite while
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printing oopses. Recommended for development systems but not for
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production releases.
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config ETRAX_FAST_TIMER
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bool "Enable ETRAX fast timer API"
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help
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This options enables the API to a fast timer implementation using
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timer1 to get sub jiffie resolution timers (primarily one-shot
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timers).
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This is needed if CONFIG_ETRAX_SERIAL_FAST_TIMER is enabled.
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config ETRAX_KMALLOCED_MODULES
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bool "Enable module allocation with kmalloc"
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help
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Enable module allocation with kmalloc instead of vmalloc.
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config OOM_REBOOT
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bool "Enable reboot at out of memory"
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source "kernel/Kconfig.preempt"
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source mm/Kconfig
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endmenu
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menu "Hardware setup"
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choice
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prompt "Processor type"
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default ETRAX100LX
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config ETRAX100LX
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bool "ETRAX-100LX-v1"
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help
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Support version 1 of the ETRAX 100LX.
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config ETRAX100LX_V2
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bool "ETRAX-100LX-v2"
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help
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Support version 2 of the ETRAX 100LX.
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config SVINTO_SIM
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bool "ETRAX-100LX-for-xsim-simulator"
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help
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Support the xsim ETRAX Simulator.
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config ETRAXFS
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bool "ETRAX-FS-V32"
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help
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Support CRIS V32.
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config CRIS_MACH_ARTPEC3
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bool "ARTPEC-3"
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help
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Support Axis ARTPEC-3.
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endchoice
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config ETRAX_VCS_SIM
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bool "VCS Simulator"
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help
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Setup hardware to be run in the VCS simulator.
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config ETRAX_ARCH_V10
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bool
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default y if ETRAX100LX || ETRAX100LX_V2
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default n if !(ETRAX100LX || ETRAX100LX_V2)
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config ETRAX_ARCH_V32
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bool
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default y if (ETRAXFS || CRIS_MACH_ARTPEC3)
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default n if !(ETRAXFS || CRIS_MACH_ARTPEC3)
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config ETRAX_DRAM_SIZE
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int "DRAM size (dec, in MB)"
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default "8"
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help
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Size of DRAM (decimal in MB) typically 2, 8 or 16.
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config ETRAX_VMEM_SIZE
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int "Video memory size (dec, in MB)"
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depends on ETRAX_ARCH_V32 && !ETRAXFS
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default 8 if !ETRAXFS
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help
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Size of Video accessible memory (decimal, in MB).
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config ETRAX_FLASH_BUSWIDTH
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int "Buswidth of NOR flash in bytes"
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default "2"
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help
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Width in bytes of the NOR Flash bus (1, 2 or 4). Is usually 2.
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config ETRAX_NANDFLASH_BUSWIDTH
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int "Buswidth of NAND flash in bytes"
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default "1"
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help
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Width in bytes of the NAND flash (1 or 2).
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config ETRAX_FLASH1_SIZE
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int "FLASH1 size (dec, in MB. 0 = Unknown)"
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default "0"
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choice
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prompt "Product debug-port"
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default ETRAX_DEBUG_PORT0
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config ETRAX_DEBUG_PORT0
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bool "Serial-0"
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help
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Choose a serial port for the ETRAX debug console. Default to
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port 0.
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config ETRAX_DEBUG_PORT1
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bool "Serial-1"
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help
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Use serial port 1 for the console.
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config ETRAX_DEBUG_PORT2
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bool "Serial-2"
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help
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Use serial port 2 for the console.
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config ETRAX_DEBUG_PORT3
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bool "Serial-3"
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help
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Use serial port 3 for the console.
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config ETRAX_DEBUG_PORT_NULL
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bool "disabled"
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help
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Disable serial-port debugging.
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endchoice
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choice
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prompt "Kernel GDB port"
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depends on ETRAX_KGDB
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default ETRAX_KGDB_PORT0
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help
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Choose a serial port for kernel debugging. NOTE: This port should
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not be enabled under Drivers for built-in interfaces (as it has its
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own initialization code) and should not be the same as the debug port.
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config ETRAX_KGDB_PORT0
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bool "Serial-0"
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help
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Use serial port 0 for kernel debugging.
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config ETRAX_KGDB_PORT1
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bool "Serial-1"
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help
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Use serial port 1 for kernel debugging.
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config ETRAX_KGDB_PORT2
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bool "Serial-2"
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help
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Use serial port 2 for kernel debugging.
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config ETRAX_KGDB_PORT3
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bool "Serial-3"
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help
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Use serial port 3 for kernel debugging.
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endchoice
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source arch/cris/arch-v10/Kconfig
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source arch/cris/arch-v32/Kconfig
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endmenu
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source "net/Kconfig"
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# bring in ETRAX built-in drivers
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menu "Drivers for built-in interfaces"
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source arch/cris/arch-v10/drivers/Kconfig
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source arch/cris/arch-v32/drivers/Kconfig
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config ETRAX_AXISFLASHMAP
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bool "Axis flash-map support"
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select MTD
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select MTD_CFI
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select MTD_CFI_AMDSTD
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select MTD_JEDECPROBE if ETRAX_ARCH_V32
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select MTD_CHAR
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select MTD_BLOCK
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select MTD_PARTITIONS
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select MTD_CONCAT
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select MTD_COMPLEX_MAPPINGS
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help
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This option enables MTD mapping of flash devices. Needed to use
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flash memories. If unsure, say Y.
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config ETRAX_RTC
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bool "Real Time Clock support"
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depends on ETRAX_I2C
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help
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Enables drivers for the Real-Time Clock battery-backed chips on
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some products. The kernel reads the time when booting, and
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the date can be set using ioctl(fd, RTC_SET_TIME, &rt) with rt a
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rtc_time struct (see <file:include/asm-cris/rtc.h>) on the /dev/rtc
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device. You can check the time with cat /proc/rtc, but
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normal time reading should be done using libc function time and
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friends.
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choice
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prompt "RTC chip"
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depends on ETRAX_RTC
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default ETRAX_PCF8563 if ETRAX_ARCH_V32
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default ETRAX_DS1302 if ETRAX_ARCH_V10
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config ETRAX_DS1302
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depends on ETRAX_ARCH_V10
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bool "DS1302"
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help
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Enables the driver for the DS1302 Real-Time Clock battery-backed
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chip on some products.
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config ETRAX_PCF8563
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bool "PCF8563"
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help
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Enables the driver for the PCF8563 Real-Time Clock battery-backed
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chip on some products.
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endchoice
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config ETRAX_SYNCHRONOUS_SERIAL
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bool "Synchronous serial-port support"
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help
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Select this to enable the synchronous serial port driver.
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config ETRAX_SYNCHRONOUS_SERIAL_PORT0
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bool "Synchronous serial port 0 enabled"
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depends on ETRAX_SYNCHRONOUS_SERIAL
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help
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Enabled synchronous serial port 0.
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config ETRAX_SYNCHRONOUS_SERIAL0_DMA
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bool "Enable DMA on synchronous serial port 0."
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depends on ETRAX_SYNCHRONOUS_SERIAL_PORT0
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help
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A synchronous serial port can run in manual or DMA mode.
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Selecting this option will make it run in DMA mode.
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config ETRAX_SYNCHRONOUS_SERIAL_PORT1
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bool "Synchronous serial port 1 enabled"
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depends on ETRAX_SYNCHRONOUS_SERIAL && (ETRAXFS || ETRAX_ARCH_V10)
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help
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Enabled synchronous serial port 1.
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config ETRAX_SYNCHRONOUS_SERIAL1_DMA
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bool "Enable DMA on synchronous serial port 1."
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depends on ETRAX_SYNCHRONOUS_SERIAL_PORT1
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help
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A synchronous serial port can run in manual or DMA mode.
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Selecting this option will make it run in DMA mode.
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choice
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prompt "Network LED behavior"
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depends on ETRAX_ETHERNET
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default ETRAX_NETWORK_LED_ON_WHEN_ACTIVITY
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config ETRAX_NETWORK_LED_ON_WHEN_LINK
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bool "LED_on_when_link"
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help
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Selecting LED_on_when_link will light the LED when there is a
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connection and will flash off when there is activity.
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Selecting LED_on_when_activity will light the LED only when
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there is activity.
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This setting will also affect the behaviour of other activity LEDs
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e.g. Bluetooth.
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config ETRAX_NETWORK_LED_ON_WHEN_ACTIVITY
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bool "LED_on_when_activity"
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help
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Selecting LED_on_when_link will light the LED when there is a
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connection and will flash off when there is activity.
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Selecting LED_on_when_activity will light the LED only when
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there is activity.
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This setting will also affect the behaviour of other activity LEDs
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e.g. Bluetooth.
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endchoice
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choice
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prompt "Ser0 DMA out channel"
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depends on ETRAX_SERIAL_PORT0
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default ETRAX_SERIAL_PORT0_DMA6_OUT if ETRAX_ARCH_V32
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default ETRAX_SERIAL_PORT0_NO_DMA_OUT if ETRAX_ARCH_V10
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config ETRAX_SERIAL_PORT0_NO_DMA_OUT
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bool "Ser0 uses no DMA for output"
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help
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Do not use DMA for ser0 output.
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config ETRAX_SERIAL_PORT0_DMA6_OUT
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bool "Ser0 uses DMA6 for output"
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depends on ETRAXFS
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help
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Enables the DMA6 output channel for ser0 (ttyS0).
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If you do not enable DMA, an interrupt for each character will be
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used when transmitting data.
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Normally you want to use DMA, unless you use the DMA channel for
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something else.
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config ETRAX_SERIAL_PORT0_DMA0_OUT
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bool "Ser0 uses DMA0 for output"
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depends on CRIS_MACH_ARTPEC3
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help
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Enables the DMA0 output channel for ser0 (ttyS0).
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If you do not enable DMA, an interrupt for each character will be
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used when transmitting data.
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Normally you want to use DMA, unless you use the DMA channel for
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something else.
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endchoice
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choice
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prompt "Ser0 DMA in channel "
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depends on ETRAX_SERIAL_PORT0
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default ETRAX_SERIAL_PORT0_NO_DMA_IN if ETRAX_ARCH_V32
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default ETRAX_SERIAL_PORT0_DMA7_IN if ETRAX_ARCH_V10
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help
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What DMA channel to use for ser0.
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config ETRAX_SERIAL_PORT0_NO_DMA_IN
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bool "Ser0 uses no DMA for input"
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help
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Do not use DMA for ser0 input.
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config ETRAX_SERIAL_PORT0_DMA7_IN
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bool "Ser0 uses DMA7 for input"
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depends on ETRAXFS
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help
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Enables the DMA7 input channel for ser0 (ttyS0).
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If you do not enable DMA, an interrupt for each character will be
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used when receiving data.
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Normally you want to use DMA, unless you use the DMA channel for
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something else.
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config ETRAX_SERIAL_PORT0_DMA1_IN
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bool "Ser0 uses DMA1 for input"
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depends on CRIS_MACH_ARTPEC3
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help
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Enables the DMA1 input channel for ser0 (ttyS0).
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If you do not enable DMA, an interrupt for each character will be
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used when receiveing data.
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Normally you want to use DMA, unless you use the DMA channel for
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something else.
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endchoice
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choice
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prompt "Ser1 DMA in channel "
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depends on ETRAX_SERIAL_PORT1
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default ETRAX_SERIAL_PORT1_NO_DMA_IN if ETRAX_ARCH_V32
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default ETRAX_SERIAL_PORT1_DMA9_IN if ETRAX_ARCH_V10
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help
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What DMA channel to use for ser1.
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config ETRAX_SERIAL_PORT1_NO_DMA_IN
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bool "Ser1 uses no DMA for input"
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help
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Do not use DMA for ser1 input.
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config ETRAX_SERIAL_PORT1_DMA5_IN
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bool "Ser1 uses DMA5 for input"
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depends on ETRAX_ARCH_V32
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help
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Enables the DMA5 input channel for ser1 (ttyS1).
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If you do not enable DMA, an interrupt for each character will be
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used when receiving data.
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Normally you want this on, unless you use the DMA channel for
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something else.
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config ETRAX_SERIAL_PORT1_DMA9_IN
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depends on ETRAX_ARCH_V10
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bool "Ser1 uses DMA9 for input"
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endchoice
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choice
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prompt "Ser1 DMA out channel"
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depends on ETRAX_SERIAL_PORT1
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default ETRAX_SERIAL_PORT1_NO_DMA_OUT if ETRAX_ARCH_V32
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default ETRAX_SERIAL_PORT1_DMA8_OUT if ETRAX_ARCH_V10
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help
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What DMA channel to use for ser1.
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config ETRAX_SERIAL_PORT1_NO_DMA_OUT
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bool "Ser1 uses no DMA for output"
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help
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Do not use DMA for ser1 output.
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config ETRAX_SERIAL_PORT1_DMA8_OUT
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depends on ETRAX_ARCH_V10
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bool "Ser1 uses DMA8 for output"
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config ETRAX_SERIAL_PORT1_DMA4_OUT
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depends on ETRAX_ARCH_V32
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bool "Ser1 uses DMA4 for output"
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help
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Enables the DMA4 output channel for ser1 (ttyS1).
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If you do not enable DMA, an interrupt for each character will be
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used when transmitting data.
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Normally you want this on, unless you use the DMA channel for
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something else.
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endchoice
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choice
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prompt "Ser2 DMA out channel"
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depends on ETRAX_SERIAL_PORT2
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default ETRAX_SERIAL_PORT2_NO_DMA_OUT if ETRAX_ARCH_V32
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default ETRAX_SERIAL_PORT2_DMA2_OUT if ETRAX_ARCH_V10
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config ETRAX_SERIAL_PORT2_NO_DMA_OUT
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bool "Ser2 uses no DMA for output"
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help
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Do not use DMA for ser2 output.
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config ETRAX_SERIAL_PORT2_DMA2_OUT
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bool "Ser2 uses DMA2 for output"
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depends on ETRAXFS || ETRAX_ARCH_V10
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help
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Enables the DMA2 output channel for ser2 (ttyS2).
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If you do not enable DMA, an interrupt for each character will be
|
|
used when transmitting data.
|
|
Normally you want to use DMA, unless you use the DMA channel for
|
|
something else.
|
|
|
|
config ETRAX_SERIAL_PORT2_DMA6_OUT
|
|
bool "Ser2 uses DMA6 for output"
|
|
depends on CRIS_MACH_ARTPEC3
|
|
help
|
|
Enables the DMA6 output channel for ser2 (ttyS2).
|
|
If you do not enable DMA, an interrupt for each character will be
|
|
used when transmitting data.
|
|
Normally you want to use DMA, unless you use the DMA channel for
|
|
something else.
|
|
|
|
endchoice
|
|
|
|
choice
|
|
prompt "Ser2 DMA in channel"
|
|
depends on ETRAX_SERIAL_PORT2
|
|
default ETRAX_SERIAL_PORT2_NO_DMA_IN if ETRAX_ARCH_V32
|
|
default ETRAX_SERIAL_PORT2_DMA3_IN if ETRAX_ARCH_V10
|
|
help
|
|
What DMA channel to use for ser2.
|
|
|
|
config ETRAX_SERIAL_PORT2_NO_DMA_IN
|
|
bool "Ser2 uses no DMA for input"
|
|
help
|
|
Do not use DMA for ser2 input.
|
|
|
|
config ETRAX_SERIAL_PORT2_DMA3_IN
|
|
bool "Ser2 uses DMA3 for input"
|
|
depends on ETRAXFS || ETRAX_ARCH_V10
|
|
help
|
|
Enables the DMA3 input channel for ser2 (ttyS2).
|
|
If you do not enable DMA, an interrupt for each character will be
|
|
used when receiving data.
|
|
Normally you want to use DMA, unless you use the DMA channel for
|
|
something else.
|
|
|
|
config ETRAX_SERIAL_PORT2_DMA7_IN
|
|
bool "Ser2 uses DMA7 for input"
|
|
depends on CRIS_MACH_ARTPEC3
|
|
help
|
|
Enables the DMA7 input channel for ser2 (ttyS2).
|
|
If you do not enable DMA, an interrupt for each character will be
|
|
used when receiveing data.
|
|
Normally you want to use DMA, unless you use the DMA channel for
|
|
something else.
|
|
|
|
endchoice
|
|
|
|
choice
|
|
prompt "Ser3 DMA in channel"
|
|
depends on ETRAX_SERIAL_PORT3
|
|
default ETRAX_SERIAL_PORT3_NO_DMA_IN if ETRAX_ARCH_V32
|
|
default ETRAX_SERIAL_PORT3_DMA5_IN if ETRAX_ARCH_V10
|
|
help
|
|
What DMA channel to use for ser3.
|
|
|
|
config ETRAX_SERIAL_PORT3_NO_DMA_IN
|
|
bool "Ser3 uses no DMA for input"
|
|
help
|
|
Do not use DMA for ser3 input.
|
|
|
|
config ETRAX_SERIAL_PORT3_DMA5_IN
|
|
depends on ETRAX_ARCH_V10
|
|
bool "DMA 5"
|
|
|
|
config ETRAX_SERIAL_PORT3_DMA9_IN
|
|
bool "Ser3 uses DMA9 for input"
|
|
depends on ETRAXFS
|
|
help
|
|
Enables the DMA9 input channel for ser3 (ttyS3).
|
|
If you do not enable DMA, an interrupt for each character will be
|
|
used when receiving data.
|
|
Normally you want to use DMA, unless you use the DMA channel for
|
|
something else.
|
|
|
|
config ETRAX_SERIAL_PORT3_DMA3_IN
|
|
bool "Ser3 uses DMA3 for input"
|
|
depends on CRIS_MACH_ARTPEC3
|
|
help
|
|
Enables the DMA3 input channel for ser3 (ttyS3).
|
|
If you do not enable DMA, an interrupt for each character will be
|
|
used when receiveing data.
|
|
Normally you want to use DMA, unless you use the DMA channel for
|
|
something else.
|
|
|
|
endchoice
|
|
|
|
choice
|
|
prompt "Ser3 DMA out channel"
|
|
depends on ETRAX_SERIAL_PORT3
|
|
default ETRAX_SERIAL_PORT3_NO_DMA_OUT if ETRAX_ARCH_V32
|
|
default ETRAX_SERIAL_PORT3_DMA4_OUT if ETRAX_ARCH_V10
|
|
|
|
config ETRAX_SERIAL_PORT3_NO_DMA_OUT
|
|
bool "Ser3 uses no DMA for output"
|
|
help
|
|
Do not use DMA for ser3 output.
|
|
|
|
config ETRAX_SERIAL_PORT3_DMA4_OUT
|
|
depends on ETRAX_ARCH_V10
|
|
bool "DMA 4"
|
|
|
|
config ETRAX_SERIAL_PORT3_DMA8_OUT
|
|
bool "Ser3 uses DMA8 for output"
|
|
depends on ETRAXFS
|
|
help
|
|
Enables the DMA8 output channel for ser3 (ttyS3).
|
|
If you do not enable DMA, an interrupt for each character will be
|
|
used when transmitting data.
|
|
Normally you want to use DMA, unless you use the DMA channel for
|
|
something else.
|
|
|
|
config ETRAX_SERIAL_PORT3_DMA2_OUT
|
|
bool "Ser3 uses DMA2 for output"
|
|
depends on CRIS_MACH_ARTPEC3
|
|
help
|
|
Enables the DMA2 output channel for ser3 (ttyS3).
|
|
If you do not enable DMA, an interrupt for each character will be
|
|
used when transmitting data.
|
|
Normally you want to use DMA, unless you use the DMA channel for
|
|
something else.
|
|
|
|
endchoice
|
|
|
|
endmenu
|
|
|
|
source "drivers/base/Kconfig"
|
|
|
|
# standard linux drivers
|
|
source "drivers/mtd/Kconfig"
|
|
|
|
source "drivers/parport/Kconfig"
|
|
|
|
source "drivers/pnp/Kconfig"
|
|
|
|
source "drivers/block/Kconfig"
|
|
|
|
source "drivers/ide/Kconfig"
|
|
|
|
source "drivers/net/Kconfig"
|
|
|
|
source "drivers/i2c/Kconfig"
|
|
|
|
source "drivers/rtc/Kconfig"
|
|
|
|
#
|
|
# input before char - char/joystick depends on it. As does USB.
|
|
#
|
|
source "drivers/input/Kconfig"
|
|
|
|
source "drivers/char/Kconfig"
|
|
|
|
source "fs/Kconfig"
|
|
|
|
source "drivers/usb/Kconfig"
|
|
|
|
source "arch/cris/Kconfig.debug"
|
|
|
|
source "security/Kconfig"
|
|
|
|
source "crypto/Kconfig"
|
|
|
|
source "lib/Kconfig"
|