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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>
2008-10-09Blackfin 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: Make L2 SRAM cacheableSonic Zhang
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-09Blackfin arch: add support for BF52x-0.2, BF533-0.6, and BF54x-0.2Mike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-09Blackfin arch: fix default silicon rev selection so it works for all ↵Mike Frysinger
supported parts Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-09Blackfin arch: BF561 is supported, no longer a work in progressMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-08Blackfin arch: fix merge errors during 2.6.26 upgradeMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-08Blackfin arch: add CONFIG_APP_STACKS_L1 to enable or disable putting kernel ↵Graf Yang
stacks in L1 use CONFIG_APP_STACKS_L1 to enable or disable putting kernel stacks in L1, default is enabled, SMP kernel need turn it off Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-13Blackfin arch: Add new board support for ADZS-BF526-EZ-BRDMichael Hennerich
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-08-27Blackfin arch: let PCI depend on BROKENAdrian Bunk
AFAIR there exists blackfin hardware with PCI support, but the support currently in the kernel fails to build starting with: ... CC drivers/pci/probe.o probe.c: In function 'pci_scan_slot': probe.c:1056: error: implicit declaration of function 'pcibios_scan_all_fns' make[3]: *** [drivers/pci/probe.o] Error 1 Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-08-14Blackfin arch: add support for the BlackStamp boardBenjamin Matthews
Signed-off-by: Benjamin Matthews <bmat@lle.rochester.edu> Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-08-14Blackfin arch: Allow ins functions to have a low latency versionRobin Getz
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-08-05Blackfin arch: Functional power management supportMichael Hennerich
Merge VR Regulator Hibernate wakeups into set_irq_wake for internal interrupts. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-07-26Merge 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: (30 commits) Blackfin arch: If we double fault, rather than hang forever, reset Blackfin arch: When icache is off, make sure people know it Blackfin arch: Fix bug - skip single step in high priority interrupt handler instead of disabling all interrupts in single step debugging. Blackfin arch: cache the values of vco/sclk/cclk as the overhead of doing so (~24 bytes) is worth avoiding the software mult/div routines Blackfin arch: fix bug - IMDMA is not type struct dma_register Blackfin arch: check the EXTBANKS field of the DDRCTL1 register to see if we are using both memory banks Blackfin arch: Apply Bluetechnix CM-BF527 board support patch Blackfin arch: Add unwinding for stack info, and a little more detail on trace buffer Blackfin arch: Add ISP1760 board resources to BF548-EZKIT Blackfin arch: fix bug - detect 0.1 silicon revision BF527-EZKIT as 0.0 version Blackfin arch: add missing IORESOURCE_MEM flags to UART3 Blackfin arch: Add return value check in bfin_sir_probe(), remove SSYNC(). Blackfin arch: Extend sram malloc to handle L2 SRAM. Blackfin arch: Remove useless config option. Blackfin arch: change L1 malloc to base on slab cache and lists. Blackfin arch: use local labels and ENDPROC() markings Blackfin arch: Do not need this dualcore test module in kernel. Blackfin arch: Allow ptrace to peek and poke application data in L1 data SRAM. Blackfin arch: Add ANOMALY_05000368 workaround Blackfin arch: Functional power management support ...
2008-07-22remove mention of CONFIG_KMOD from documentationJohannes Berg
Also includes a few Kconfig files (xtensa, blackfin) Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: linux-doc@vger.kernel.org Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Randy Dunlap <rdunlap@xenotime.net>
2008-07-19Blackfin arch: Apply Bluetechnix CM-BF527 board support patchMichael Hennerich
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-07-19Blackfin arch: Remove useless config option.Robin Getz
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-07-19Blackfin arch: Functional power management supportMichael Hennerich
Enable: PM_SUSPEND_MEM -> Blackfin Hibernate to SDRAM This feature requires a special bootloader (u-boot) supporting return from hibernate. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-07-14Blackfin arch: Remove redundant kernel optionMichael Hennerich
use kernel command line mem and max_mem bootargs to limit availabe memory instead. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-07-14Blackfin arch: Fix bug - Kernel does not boot if re-program clocksMichael Hennerich
Don't write conflicting data to EBIU_SDBCTL after the SDRAM is configured. This can cause data corruption, since we might change SDRAM row and column addressing modes. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-05-17Blackfin arch: enable a choice to provide 4M DMA memoryCliff Cai
support two cascaded AD73322 cards, more uncached DMA memory is needed, so add a choice to provide 4M DMA memory Signed-off-by: Cliff Cai <cliff.cai@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-05-13[Blackfin] arch: rename bf5xx-flash to bfin-async-flashMike Frysinger
- move all kconfig board settings into board resources - fixup casting style according to lkml feedback - rewrite driver so that it can handle arbitrary of instances according to the declared platform resources Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Cc: Joern Engel <joern@logfs.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-05-07[Blackfin] arch: add EBIU supporting for BF54x EZKIT SMSC LAN911x/LAN921x ↵Michael Hennerich
families embedded ethernet driver Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-05-07[Blackfin] arch: Functional power management support: Add CPU and platform ↵Michael Hennerich
voltage scaling support Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-05-07[Blackfin] arch: Cleanup Kconfig, fix comment and make sure we exclude ↵Michael Hennerich
CCLK=SCLK for some configurations Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-25[Blackfin] arch: Add a warning about the value of CLKIN.Sonic Zhang
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-25[Blackfin] arch: reorganize some of the board-customization options so that ↵Mike Frysinger
similar things are together and only available as needed Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-25[Blackfin] arch: detect the memory available in the system on the fly by defaultMike Frysinger
detect the memory available in the system on the fly by default rather than forcing people to set this manually in the kconfig Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-24[Blackfin] arch: merge ip0x-specific board changesMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-24[Blackfin] arch: Apply Bluetechnix vendor patchMichael Hennerich
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-23[Blackfin] arch: LARGE_ALLOCS was dropped along the way ... bring Blackfin ↵Mike Frysinger
in line Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-23[Blackfin] arch: we no longer use BFIN_{SINGLE,DUAL}_CORE in our sourceMike Frysinger
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-23[Blackfin] arch: MEM_ADD_WIDTH only gets used when reprogramming clocks, so ↵Mike Frysinger
dont bother exposing it in the menu normally Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-02-29[Blackfin] arch: initial generic time and clock sourcesVitja Makarov
This patch enables Hight-Res Timers and tickless kernel Signed-off-by: Vitja Makarov <vitja.makarov@gmail.com> Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-17Generic semaphore implementationMatthew Wilcox
Semaphores are no longer performance-critical, so a generic C implementation is better for maintainability, debuggability and extensibility. Thanks to Peter Zijlstra for fixing the lockdep warning. Thanks to Harvey Harrison for pointing out that the unlikely() was unnecessary. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Acked-by: Ingo Molnar <mingo@elte.hu>
2008-02-09ide: introduce HAVE_IDESam Ravnborg
To allow flexible configuration of IDE introduce HAVE_IDE. All archs except arm, um and s390 unconditionally select it. For arm the actual configuration determine if IDE is supported. This is a step towards introducing drivers/Kconfig for arm. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Acked-by: Russell King - ARM Linux <linux@arm.linux.org.uk> Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-02-09[Blackfin] arch: hook up set_irq_wake in Blackfin's irq codeMichael Hennerich
- Add support for irq_wake on system and gpio interrupts - Remove outdated kernel options - Add option to select default PM mode - Fix various places where SIC_IWRx was only handled partially Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2008-02-03Move Kconfig.instrumentation to arch/Kconfig and init/KconfigMathieu Desnoyers
Move the instrumentation Kconfig to arch/Kconfig for architecture dependent options - oprofile - kprobes and init/Kconfig for architecture independent options - profiling - markers Remove the "Instrumentation Support" menu. Everything moves to "General setup". Delete the kernel/Kconfig.instrumentation file. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2008-02-03Add HAVE_OPROFILEMathieu Desnoyers
Linus: On the per-architecture side, I do think it would be better to *not* have internal architecture knowledge in a generic file, and as such a line like depends on X86_32 || IA64 || PPC || S390 || SPARC64 || X86_64 || AVR32 really shouldn't exist in a file like kernel/Kconfig.instrumentation. It would be much better to do depends on ARCH_SUPPORTS_KPROBES in that generic file, and then architectures that do support it would just have a bool ARCH_SUPPORTS_KPROBES default y in *their* architecture files. That would seem to be much more logical, and is readable both for arch maintainers *and* for people who have no clue - and don't care - about which architecture is supposed to support which interface... Changelog: Actually, I know I gave this as the magic incantation, but now that I see it, I realize that I should have told you to just use config ARCH_SUPPORTS_KPROBES def_bool y instead, which is a bit denser. We seem to use both kinds of syntax for these things, but this is really what "def_bool" is there for... Changelog : - Moving to HAVE_*. - Add AVR32 oprofile. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: David Howells <dhowells@redhat.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2008-02-01Suspend: Clean up Kconfig (V2)Johannes Berg
This cleans up the suspend Kconfig and removes the need to declare centrally which architectures support suspend. All architectures that currently support suspend are modified accordingly. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Russell King <rmk@arm.linux.org.uk> Acked-by: Paul Mackerras <paulus@samba.org> Acked-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Paul Mundt <lethal@linux-sh.org> Cc: Pavel Machek <pavel@suse.cz> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
2008-01-24[Blackfin] arch: use common flash driver to setup partitions rather than the ↵Mike Frysinger
bf5xx-flash driver Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2008-01-22[Blackfin] arch: Fix bug Only RTC interrupt can wake up deeper sleep core.Sonic Zhang
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2008-01-27[Blackfin] arch: Initial checkin of the memory protection support.Bernd Schmidt
Enable it with CONFIG_MPU. Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-12-24[Blackfin] arch: Restore default DMA priority over core on bf54x.Sonic Zhang
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-12-24[Blackfin] arch: add support for BF523/BF524/BF526Mike Frysinger
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-12-24[Blackfin] arch: scrub dead alive/idle LED codeMike Frysinger
if it does get re-added, it needs to be in the boards directory, not common code ... or it needs a re-implementation Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2008-01-27[Blackfin] arch: Fix bug to Enable bf548 to Re-program Clocks while Kernel ↵Sonic Zhang
boots. Reprogram DDR EBIU register properly for bf548. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-12-23[Blackfin] arch: Fix bug to Enable kernel to build for bf548 with PM.Sonic Zhang
On BF548-EZKIT, build kernel faills with power management, video and audio enabled. This patch fix this. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2008-01-15Fix Blackfin HARDWARE_PM supportMathieu Desnoyers
This patch restores the blackfin Hardware Performance Monitor Profiling support that was killed by the combining of instrumentation menus in commit 09cadedbdc01f1a4bea1f427d4fb4642eaa19da9. Since there seems to be no good reason to behave differently from other architectures, it now automatically selects the hardware performance counters whenever the profiling is activated. mach-common/irqpanic.c: pm_overflow calls pm_overflow_handler which is in oprofile/op_model_bf533.c. I doubt that setting HARDWARE_PM as "m" will work at all, since the pm_overflow_handler should be in the core kernel image because it is called by irqpanic.c. Therefore, I change HARDWARE_PM from a tristate to a bool. The whole arch/$(ARCH)/oprofile/ is built depending on CONFIG_OPROFILE. Since part of the HARDWARE_PM support files sits in this directory, it makes sense to also depend on OPROFILE, not only PROFILING. Since OPROFILE already depends on PROFILING, it is correct to only depend on OPROFILE only. Thanks to Adrian Bunk for finding this bug and providing an initial patch. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> CC: Adrian Bunk <adrian.bunk@movial.fi> CC: Randy Dunlap <randy.dunlap@oracle.com> CC: bryan.wu@analog.com Acked-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-11-21Blackfin arch: Update Kconfig to latest Blackfin silicon datasheetsRobin Getz
Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
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