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2008-10-20container freezer: implement freezer cgroup subsystemMatt Helsley
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>
2008-10-16Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6: Blackfin arch: make sure cycles is marked as volatile so gcc doesnt reorder on us Blackfin arch: disable CONFIG_HW_RANDOM and CONFIG_DAB in defconfig files Blackfin arch: update cache flush prototypes with argument names to make them less mysterious Blackfin arch: move bfin_addr_dcachable() and friends into the cacheflush header where it belongs Blackfin arch: use the new bfin_addr_dcachable() function Blackfin arch: fix bug - build kernel failed at head.S when reprogram clock on all platforms Blackfin arch: unify/cleanup cache code Blackfin arch: update AD7879 platform resources in board file Blackfin arch: Zero out bss region in L1/L2 memory. Blackfin arch: add read/write IO accessor functions to Blackfin Blackfin arch: fix bug - some serial header files set RTS to an input when they should all be outputs
2008-10-16Merge branch 'personality' of git://git390.osdl.marist.edu/pub/scm/linux-2.6Linus Torvalds
* 'personality' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: [PATCH] remove unused ibcs2/PER_SVR4 in SET_PERSONALITY
2008-10-16Blackfin arch: make sure cycles is marked as volatile so gcc doesnt reorder ↵Mike Frysinger
on us Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-16Blackfin arch: disable CONFIG_HW_RANDOM and CONFIG_DAB in defconfig filesMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-16Blackfin arch: update cache flush prototypes with argument names to make ↵Mike Frysinger
them less mysterious Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-16Blackfin arch: move bfin_addr_dcachable() and friends into the cacheflush ↵Mike Frysinger
header where it belongs Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-16Blackfin arch: use the new bfin_addr_dcachable() functionMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-16Blackfin arch: fix bug - build kernel failed at head.S when reprogram clock ↵Robin Getz
on all platforms Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-16Blackfin arch: unify/cleanup cache codeMike Frysinger
- to be correct wrt to end ranges - to be optimal with a one-instruction hardware loop Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-16Blackfin arch: update AD7879 platform resources in board fileMichael Hennerich
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-16Blackfin arch: Zero out bss region in L1/L2 memory.Graf Yang
Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-16Blackfin arch: add read/write IO accessor functions to BlackfinBryan Wu
This is to kill some compiling warning on DM9000 netdev driver. Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-16[PATCH] remove unused ibcs2/PER_SVR4 in SET_PERSONALITYMartin Schwidefsky
The SET_PERSONALITY macro is always called with a second argument of 0. Remove the ibcs argument and the various tests to set the PER_SVR4 personality. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-10-15cpufreq: remove policy->governor setting in drivers initializationDominik Brodowski
As policy->governor is already set to CPUFREQ_DEFAULT_GOVERNOR in the (always built-in) cpufreq core, we do not need to set it in the drivers. This fixes the sparc64 allmodconfig build failure. Also, remove a totally useles setting of ->policy in cpufreq-pxa3xx.c. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-13Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6: (60 commits) Blackfin arch: make sure we include the fix for SPORT hysteresis when reprogramming clocks Blackfin arch: Fix bogus str_ident check in gpio code Blackfin arch: AD7879 Touchscreen driver Blackfin arch: introducing bfin_addr_dcachable Blackfin arch: fix a typo in comments Blackfin arch: Remove useless head file Blackfin arch: make sure L2 start and length are always defined (fixes building on BF542) Blackfin arch: use the Blackfin on-chip ROM to do software reset when possible Blackfin arch: update anomaly headers to match the latest sheet Blackfin arch: bfin_reset() is an internal reboot function ... everyone should go through machine_restart() Blackfin arch: print out error/warning if you are running on the incorrect CPU type Blackfin arch: remove non-bf54x ifdef logic since this file is only compiled on bf54x parts Blackfin arch: update board defconfigs Blackfin arch: Add optional verbose debug Blackfin arch: emulate a TTY over the EMUDAT/JTAG interface Blackfin arch: have is_user_addr_valid() check for overflows (like when address is -1) Blackfin arch: ptrace - fix off-by-one check on end of memory regions Blackfin arch: Enable framebuffer support for the BF526-EZkit TFT LCD display Blackfin arch: flash memory map and dm9000 resources updating Blackfin arch: early prink code still use uart core console functions to parse and set configure option string ...
2008-10-13Merge git://git.infradead.org/users/dwmw2/random-2.6Linus Torvalds
* git://git.infradead.org/users/dwmw2/random-2.6: Fix autoloading of MacBook Pro backlight driver. Automatic MODULE_ALIAS() for DMI match tables. Remove asm/a.out.h files for all architectures without a.out support. Introduce HAVE_AOUT symbol to remove hard-coded arch list for BINFMT_AOUT Remove redundant CONFIG_ARCH_SUPPORTS_AOUT S390: Update comments about why we don't use <asm-generic/statfs.h> SPARC: Use <asm-generic/statfs.h> PowerPC: Use <asm-generic/statfs.h> PARISC: Use <asm-generic/statfs.h> x86_64: Use <asm-generic/statfs.h> IA64: Use <asm-generic/statfs.h> ARM: Use <asm-generic/statfs.h> Make <asm-generic/statfs.h> suitable for 64-bit platforms. Define and use PCI_DEVICE_ID_MARVELL_88ALP01_CCIC for CAFÉ camera driver [MTD] [NAND] Define and use PCI_DEVICE_ID_MARVELL_88ALP01_NAND for CAFÉ Use PCI_DEVICE_ID_88ALP01 for CAFÉ chip, rather than PCI_DEVICE_ID_CAFE. EFS: Don't set f_fsid in statfs().
2008-10-13Blackfin Serial Driver: Fix bug - request UART2/3 peripheral mapped ↵Sonic Zhang
interrupts in PIO mode Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-13Blackfin Serial Driver: Fix bug - ircp fails on sir over Blackfin UARTGraf Yang
We now use the sir_dev/irtty_sir/uart/bfin_serial drivers framework to monitor the TX status. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-13Blackfin Serial Driver: move common variables out of serial headers and into ↵Mike Frysinger
the serial driver move common variables out of serial headers and into the serial driver and rename "nr_ports" to "nr_active_ports" so as to easily differentiate between BFIN_UART_NR_PORTS (the # of available) and nr_ports (the # of enabled) Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-13Blackfin arch: fix bug - some serial header files set RTS to an input when ↵Sonic Zhang
they should all be outputs Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-13Blackfin arch: make sure we include the fix for SPORT hysteresis when ↵Robin Getz
reprogramming clocks As pointed out by Appalayagari Sreedhar, make sure we include the fix for SPORT hysteresis when reprogramming clocks. Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-13Blackfin arch: Fix bogus str_ident check in gpio codeMichael Hennerich
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-13Blackfin arch: AD7879 Touchscreen driverMichael Hennerich
Add AD7879 Touchscreen driver to the device structures Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-13Blackfin arch: introducing bfin_addr_dcachableVitja Makarov
This patch introduces bfin_addr_dcachable() predicate, that simply tests is address in cachable region or not. Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-10Blackfin arch: fix a typo in commentsBryan Wu
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-10Blackfin arch: Remove useless head fileGraf Yang
Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-10Blackfin arch: make sure L2 start and length are always defined (fixes ↵Mike Frysinger
building on BF542) Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-13Blackfin arch: use the Blackfin on-chip ROM to do software reset when possibleMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-10Blackfin arch: update anomaly headers to match the latest sheetMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-10Blackfin arch: bfin_reset() is an internal reboot function ... everyone ↵Mike Frysinger
should go through machine_restart() Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-10Blackfin arch: print out error/warning if you are running on the incorrect ↵Robin Getz
CPU type Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-10Blackfin arch: remove non-bf54x ifdef logic since this file is only compiled ↵Mike Frysinger
on bf54x parts Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-10Blackfin arch: update board defconfigsMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-10Blackfin arch: Add optional verbose debugRobin Getz
Add optional verbose debug - which when turned off, quiets down userspace errors. Saves ~8k of code/data for production systems Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-10Blackfin arch: emulate a TTY over the EMUDAT/JTAG interfaceMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-10Blackfin arch: have is_user_addr_valid() check for overflows (like when ↵Mike Frysinger
address is -1) Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-10Blackfin arch: ptrace - fix off-by-one check on end of memory regionsMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-13Blackfin arch: Enable framebuffer support for the BF526-EZkit TFT LCD displayMichael Hennerich
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-09Blackfin arch: flash memory map and dm9000 resources updatingJavier Herrero
Signed-off-by: Javier Herrero <jherrero@hvsistemas.es> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-09Blackfin arch: early prink code still use uart core console functions to ↵Sonic Zhang
parse and set configure option string Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-09Blackfin arch: Move all the silicon rev handling to one placeMike Frysinger
Move all the silicon rev handling to one place (Kconfig) and make sure we warn if you are running on silicon that has not been tested on Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-09Blackfin arch: fix end address for parallel flash and increase kernel ↵Mike Frysinger
partition size to 4meg Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-09Blackfin arch: avoid using actual config name in commentMike Frysinger
avoid using actual config name in comment as a text search is done to see what files need to be rebuilt Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-09Blackfin arch: Fix bug - HW Errors never recover on BF548Robin Getz
The kernel does not properly clear the EBIU Error Master (EBIU_ERRMST) Register on BF548, which causes the kernel to panic. We need to make sure that we clear the EBIU_ERRMST (necessary on BF54x) Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-09Blackfin arch: correct icache size in show_cpuinfo(), let c_start() return ↵Graf Yang
proper pointer Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-09Blackfin arch: give sys_strace proper entry markingsMike Frysinger
a global _sys_trace will cause the assembler to fail, it should be fixed in toolchain side firstly. Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-09Blackfin arch: ptrace - make sure PT_ORIG_R0 and PT_ORIG_P0 offsets are declaredMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-09Blackfin arch: use existing ptrace_disable() func to clear TRACE_BITS and ↵Mike Frysinger
create the opposite ptrace_enable() Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-09Blackfin arch: ptrace - cleanup debug messages and styleMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
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