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| * | bugfix: avoid underflow in budget_remaining()Bjoern B. Brandenburg2010-11-29
| | | | | | | | | | | | | | | | | | | | | budget_remaining() reports incorrect values due to the operands being switched, which leads to an integer underflow. Reported-by: Chris Kenna <cjk@cs.unc.edu>
| * | add optional [function@file:line] tag to TRACE() logBjoern B. Brandenburg2010-11-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add information to each trace message that makes it easier to locate where it came from. It is disabled by default since this adds a lot of clutter. Example: 81281 P1 [gsnedf_schedule@litmus/sched_gsn_edf.c:406]: (rtspin/1483:1) blocks:0 out_of_time:0 np:0 sleep:1 preempt:0 state:0 sig:0 81282 P1 [job_completion@litmus/sched_gsn_edf.c:303]: (rtspin/1483:1) job_completion(). 81283 P1 [__add_release@litmus/rt_domain.c:344]: (rtspin/1483:2) add_release(), rel=41941764351 81284 P1 [gsnedf_schedule@litmus/sched_gsn_edf.c:453]: (rtspin/1483:2) scheduled_on = NO_CPU
| * | log job number in TRACE_TASK() and TRACE_CUR()Bjoern B. Brandenburg2010-11-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For some problems it can be helpful to know which job of a task generated a log message. This patch changes TRACE_TASK to add :<jobno> to the existing (<comm>/<pid>) tag. The result is a trace such as the following, in which the third job of rtspin/1511 completes and the fourth job is added to the release queue. 137615 P0: (rtspin/1511:3) job_completion(). 137616 P0: (rtspin/1511:4) add_release(), rel=262013223089 137617 P0: (rtspin/1511:4) scheduled_on = NO_CPU The job number for non-real-time tasks is always zero.
| * | Remove LITMUS^RT TRACE_BUG_ON macroBjoern B. Brandenburg2010-11-11
| | | | | | | | | | | | | | | | | | Linux now has a macro of the same name, which causes namespace collisions. Since our version is only being used in two places that haven't triggered in several years, let's just remove it.
| * | Implement proper remote preemption supportBjoern B. Brandenburg2010-11-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To date, Litmus has just hooked into the smp_send_reschedule() IPI handler and marked tasks as having to reschedule to implement remote preemptions. This was never particularly clean, but so far we got away with it. However, changes in the underlying Linux, and peculartities of the ARM code (interrupts enabled before context switch) break this naive approach. This patch introduces new state-machine based remote preemption support. By examining the local state before calling set_tsk_need_resched(), we avoid confusing the underlying Linux scheduler. Further, this patch avoids sending unncessary IPIs.
| * | Split out TRACE() from litmus.h and cleanup some includesBjoern B. Brandenburg2010-11-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The TRACE() functionality doesn't need all of litmus.h. Currently, it's impossible to use TRACE() in sched.h due to a circular dependency. This patch moves TRACE() and friends to litmus/sched_debug.h, which can be included in sched.h. While at it, also fix some minor include ugliness that was revealed by this change.
| * | C-EDF: move /proc/litmus/cluster_cache to /proc/litmus/plugins/C-EDF/clusterBjoern B. Brandenburg2010-11-11
| | | | | | | | | | | | | | | | | | | | | Make use of the new per-plugin proc file infrastructure to avoid littering the global namespace. While at it, also move all the relevant bits to sched_cedf.c. In the future, each plugin's parameters should be handled in the respective plugin file.
| * | Litmus core: refactor the implementation of /procChristopher Kenna2010-10-23
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| * | Litmus core: per-plugin proc directoriesChristopher Kenna2010-10-23
| | | | | | | | | | | | | | | | | | Change the Litmus proc layout so that loaded plugins are visible in /proc/litmus/plugins/loaded and add Litmus functions make_plugin_proc_dir() and remove_plugin_proc_dir() to add per-plugin proc directories.
| * | Merge commit 'v2.6.36' into wip-merge-2.6.36Andrea Bastoni2010-10-23
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: Makefile arch/x86/include/asm/unistd_32.h arch/x86/kernel/syscall_table_32.S kernel/sched.c kernel/time/tick-sched.c Relevant API and functions changes (solved in this commit): - (API) .enqueue_task() (enqueue_task_litmus), dequeue_task() (dequeue_task_litmus), [litmus/sched_litmus.c] - (API) .select_task_rq() (select_task_rq_litmus) [litmus/sched_litmus.c] - (API) sysrq_dump_trace_buffer() and sysrq_handle_kill_rt_tasks() [litmus/sched_trace.c] - struct kfifo internal buffer name changed (buffer -> buf) [litmus/sched_trace.c] - add_wait_queue_exclusive_locked -> __add_wait_queue_tail_exclusive [litmus/fmlp.c] - syscall numbers for both x86_32 and x86_64
| * | | Litmus core: add plugin-independent precise budget enforcement infrastructureBjoern B. Brandenburg2010-10-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Simple logic: if a task requires precise enforcement, then program a hr-timer to fire when the task must be descheduled. When the timer fires, simply activate the scheduler. When we switch to a different task, either reprogram the timer or cancel it.
| * | | Litmus core: add macro to test for PRECISE_ENFORCEMENTBjoern B. Brandenburg2010-10-19
| | | | | | | | | | | | | | | | | | | | | | | | Required for EDF-WM. We should implement precise enforcement in the core distribution soon anyway (once we know how it works in EDF-WM).
| * | | Litmus core: add budget_remaining() helperBjoern B. Brandenburg2010-10-19
| | | | | | | | | | | | | | | | Quick way to figure out how much budget a LITMUS^RT job has left.
| * | | hrtimer: add init function to properly set hrtimer_start_on_info paramsAndrea Bastoni2010-10-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This helper function is also useful to remind us that if we use hrtimer_pull outside the scope of triggering remote releases, we need to take care of properly set the "state" field of hrtimer_start_on_info structure.
| * | | rt_domain_t: add add_release_on()Bjoern B. Brandenburg2010-10-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This API addition allows the calling code to override the release master for a given rt_domain_t object. This is particularly useful if a job is supposed to migrate to a particular CPU. This need arises for example in semi- partitioned schedulers.
| * | | Make platform-specific Feather-Trace depend on !CONFIG_DEBUG_RODATABjoern B. Brandenburg2010-06-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Feather-Trace rewrites instructions in the kernel's .text segment. This segment may be write-protected if CONFIG_DEBUG_RODATA is selected. In this case, fall back to the default flag-based Feather-Trace implementation. In the future, we could either adopt the ftrace method of rewriting .text addresses using non-.text mappings or we could consider replacing Feather-Trace with ftrace altogether. For now, this patch avoids unexpected runtime errors.
| * | | Make smp_send_pull_timers() optional.Bjoern B. Brandenburg2010-06-01
| | | | | | | | | | | | | | | | | | | | There is currently no need to implement this in ARM. So let's make it optional instead.
| * | | Make release master support optionalBjoern B. Brandenburg2010-06-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduces CONFIG_RELEASE_MASTER and makes release master support dependent on the new symbol. This is useful because dedicated interrupt handling only applies to "large" multicore platforms. This will allow us to not implement smp_send_pull_timers() for all platforms.
| * | | Make __ARCH_HAS_FEATHER_TRACE a proper CONFIG_ variable.Bjoern B. Brandenburg2010-05-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The idea of the Feather-Trace default implementation is that LITMUS^RT should work without a specialized Feather-Trace implementation present. This was actually broken. Changes litmus/feather_trace.h to only include asm/feather_trace.h if actually promised by the architecture.
| * | | Added support for choices in budget policy enforcement.Glenn Elliott2010-05-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | NO_ENFORCEMENT - A job may execute beyond its declared execution time. Jobs notify the kernel that they are complete via liblitmus's sleep_next_period() QUANTUM_ENFORCEMENT - The kernel terminates a job if its actual execution time exceeds the declared execution time. PRECISE_ENFORCEMENT - Hook declared, but not yet implemented. Plan to support this policy through hrtimers. Error thrown if specified.
| * | | Change most LitmusRT spinlock_t in raw_spinlock_tAndrea Bastoni2010-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adapt to new schema for spinlock: (tglx 20091217) spinlock - the weakest one, which might sleep in RT raw_spinlock - spinlock which always spins even on RT arch_spinlock - the hardware level architecture dependent implementation ---- Most probably, all the spinlocks changed by this commit will be true spinning lock (raw_spinlock) in PreemptRT (so hopefully we'll need few changes when porting Litmmus to PreemptRT). There are a couple of spinlock that the kernel still defines as spinlock_t (therefore no changes reported in this commit) that might cause us troubles: - wait_queue_t lock is defined as spinlock_t; it is used in: * fmlp.c -- sem->wait.lock * sync.c -- ts_release.wait.lock - rwlock_t used in fifo implementation in sched_trace.c * this need probably to be changed to something always spinning in RT at the expense of increased locking time. ---- This commit also fixes warnings and errors due to the need to include slab.h when using kmalloc() and friends. ---- This commit does not compile.
| * | | Merge branch 'master' into wip-merge-2.6.34Andrea Bastoni2010-05-29
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Simple merge between master and 2.6.34 with conflicts resolved. This commit does not compile, the following main problems are still unresolved: - spinlock -> raw_spinlock API changes - kfifo API changes - sched_class API changes Conflicts: Makefile arch/x86/include/asm/hw_irq.h arch/x86/include/asm/unistd_32.h arch/x86/kernel/syscall_table_32.S include/linux/hrtimer.h kernel/sched.c kernel/sched_fair.c
| | * | | Add C-EDF PluginAndrea Bastoni2010-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Improved C-EDF plugin. C-EDF now supports different cluster sizes (based on L2 and L3 cache sharing) and supports dynamic changes of cluster size (this requires reloading the plugin).
| | * | | Bugfix: 1) incorrect FMLP high prio task tracking and 2) race in print statementGlenn Elliott2010-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1) High priority task tied to FMLP semaphore in P-EDF scheduling is incorrectly tracked for tasks acquiring the lock without contention. (HP is always set to CPU 0 instead of proper CPU.) 2) Race in a print statement from P-EDF's pi_block() causes NULL pointer dereference.
| | * | | Introduce generic NP-section aware preemption functionBjoern B. Brandenburg2010-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Dealing with preemptions across CPUs in the presence of non-preemptive sections can be tricky and should not be replicated across (event-driven) plugins. This patch introduces a generic preemption function that handles non-preemptive sections (hopefully) correctly.
| | * | | Re-implement non-preemptive section support.Bjoern B. Brandenburg2010-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Re-introduce NP sections in the configuration and in litmus.h. Remove the old np_flag from rt_param. If CONFIG_NP_SECTION is disabled, then all non-preemptive section checks are constant expressions which should get removed by the dead code elimination during optimization. Instead of re-implementing sys_exit_np(), we simply repurposed sched_yield() for calling into the scheduler to trigger delayed preemptions.
| | * | | Add virtual LITMUS^RT control device.Bjoern B. Brandenburg2010-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This device only supports mmap()'ing a single page. This page is shared RW between the kernel and userspace. It is inteded to allow near-zero-overhead communication between the kernel and userspace. It's first use will be a proper implementation of user-signaled non-preemptable section support.
| | * | | Add Feather-Trace x86_64 architecture dependent codeAndrea Bastoni2010-05-29
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| | * | | [ported from 2008.3] Add Feather-Trace x86_32 architecture dependent codeAndrea Bastoni2010-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | - [ported from 2008.3] Add x86_32 architecture dependent code. - Add the infrastructure for x86_32 - x86_64 integration.
| | * | | Add support for x86_64 architectureAndrea Bastoni2010-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Add syscall on x86_64 - Refactor __NR_sleep_next_period -> __NR_complete_job for both x86_32 and x86_64
| | * | | Refactor binomial heap names: heap -> bheapAndrea Bastoni2010-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Binomial heap "heap" names conflicted with priority heap of cgroup in kernel - This patch change binomial heap "heap" names in "bheap"
| | * | | [ported from 2008.3] Add release-master supportAndrea Bastoni2010-05-29
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| | * | | [ported from 2008.3] Add hrtimer_start_on() APIAndrea Bastoni2010-05-29
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| | * | | [ported from 2008.3] Add send_pull_timers() support for x86_32 archAndrea Bastoni2010-05-29
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| | * | | [ported from 2008.3] Add LITRMUS^RT syscalls to x86_32Andrea Bastoni2010-05-29
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| | * | | [ported from 2008.3] Add File Descriptor Attached Shared Objects (FDSO) ↵Andrea Bastoni2010-05-29
| | | | | | | | | | | | | | | | | | | | infrastructure
| | * | | [ported from 2008.3] Add common EDF functionsAndrea Bastoni2010-05-29
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| | * | | [ported from 2008.3] Add rt_domain_t supportAndrea Bastoni2010-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | Still to be merged: - arm_release_timer() with no rq locking
| | * | | [ported from 2008.3] Add support for quantum alignmentAndrea Bastoni2010-05-29
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| | * | | [ported from 2008.3] Add complete_n() callAndrea Bastoni2010-05-29
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| | * | | [ported from 2008.3] Add tracing support and hook up Litmus KConfig for x86Andrea Bastoni2010-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - fix requesting more than 2^11 pages (MAX_ORDER) to system allocator Still to be merged: - feather-trace generic implementation
| | * | | [ported from 2008.3] Add Feather-Trace device file supportAndrea Bastoni2010-05-29
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| | * | | [ported from 2008.3] Core LITMUS^RT infrastructureAndrea Bastoni2010-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Port 2008.3 Core LITMUS^RT infrastructure to Linux 2.6.32 litmus_sched_class implements 4 new methods: - prio_changed: void - switched_to: void - get_rr_interval: return infinity (i.e., 0) - select_task_rq: return current cpu
* | | | | net: new counter for tx_timeout errors in sysfsdavid decotigny2012-09-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds the /sys/class/net/DEV/queues/Q/tx_timeout attribute containing the total number of timeout events on the given queue. It is always available with CONFIG_SYSFS, independently of CONFIG_RPS/XPS. Credits to Stephen Hemminger for a preliminary version of this patch. Tested: without CONFIG_SYSFS (compilation only) with sysfs and without CONFIG_RPS & CONFIG_XPS with sysfs and without CONFIG_RPS with sysfs and without CONFIG_XPS with defaults Signed-off-by: David Decotigny <david.decotigny@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Conflicts: include/linux/netdevice.h Signed-off-by: Christopher Kenna <cjk@cs.unc.edu>
* | | | | Add exynos video header file.Christopher Kenna2012-09-28
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* | | | | writeback: remove writeback_control.more_ioWu Fengguang2012-09-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When wbc.more_io was first introduced, it indicates whether there are at least one superblock whose s_more_io contains more IO work. Now with the per-bdi writeback, it can be replaced with a simple b_more_io test. Acked-by: Jan Kara <jack@suse.cz> Acked-by: Mel Gorman <mel@csn.ul.ie> Reviewed-by: Minchan Kim <minchan.kim@gmail.com> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Did not change conflicting files. Conflicts: fs/fs-writeback.c include/trace/events/writeback.h
* | | | | writeback: send work item to queue_io, move_expired_inodesCurt Wohlgemuth2012-09-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of sending ->older_than_this to queue_io() and move_expired_inodes(), send the entire wb_writeback_work structure. There are other fields of a work item that are useful in these routines and in tracepoints. Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Curt Wohlgemuth <curtw@google.com> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Christopher Kenna <cjk@cs.unc.edu>
* | | | | Apply k4412 kernel from HardKernel for ODROID-X.Christopher Kenna2012-09-28
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* | | | | USB: add USB_VENDOR_AND_INTERFACE_INFO() macroGustavo Padovan2012-08-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit d81a5d1956731c453b85c141458d4ff5d6cc5366 upstream. A lot of Broadcom Bluetooth devices provides vendor specific interface class and we are getting flooded by patches adding new device support. This change will help us enable support for any other Broadcom with vendor specific device that arrives in the future. Only the product id changes for those devices, so this macro would be perfect for us: { USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01) } Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Acked-by: Henrik Rydberg <rydberg@bitmath.se> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | | | | ARM: pxa: remove irq_to_gpio from ezx-pcap driverArnd Bergmann2012-08-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit 59ee93a528b94ef4e81a08db252b0326feff171f upstream. The irq_to_gpio function was removed from the pxa platform in linux-3.2, and this driver has been broken since. There is actually no in-tree user of this driver that adds this platform device, but the driver can and does get enabled on some platforms. Without this patch, building ezx_defconfig results in: drivers/mfd/ezx-pcap.c: In function 'pcap_isr_work': drivers/mfd/ezx-pcap.c:205:2: error: implicit declaration of function 'irq_to_gpio' [-Werror=implicit-function-declaration] Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com> Cc: Samuel Ortiz <sameo@linux.intel.com> Cc: Daniel Ribeiro <drwyrm@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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