New feature: sys_null_call(), a dummy system call that simplifies the process
of determining system call overheads [litmus/litmus.c].
New feature: support for starting timers on remote CPUs via
hrtimer_start_on() [kernel/hrtimer.c].
New feature: support dedicated release handling in GSN-EDF and a
corresponding /proc interface [litmus/rt_domain.c, litmus/sched_gsn_edf.c,
litmus/litmus.c].
New feature: support IPI latency tracing [litmus/trace.c].
Warn if a task's priority is compared against itself [litmus/edf_common.c].
Remove duplicated code in heap_node allocation and allocate heap_node structs
from a dedicated slab [litmus/litmus.c].
Avoid memory allocation/de-allocation in the release queue handling hot-path
[litmus/rt_domain.c]
Use per-event hrtimers instead of multiplexing all future releases onto a single timer. Linux's hrtimers are cheap enough to do this, and it removes complexity.
Uninline binomial heap implementation to reduce code size [litmus/heap.c].
Assorted minor debugging improvements.
Minor code cleanups.
Bugfix: use is_running() in litmus_schedule() to test for task state change
race; otherwise plugins might get confused due to unexpected
task_block()/wake_up() calls.
Bugfix: avoid deadlock in hrtimer_cancel(); use hrtimer_try_to_cancel()
instead [litmus/rt_domain.c].
Bugfix: avoid race that lead to arming the same timer twice
[litmus/rt_domain.c].
Bugfix: avoid use-after-free race in release_heap [litmus/rt_domain.c].
Bugfix: avoid rare deadlock between timer base lock and release lock
[litmus/rt_domain.c].
Bugfix: fix compilation with CONFIG_SCHED_TASK_TRACE on sparc64
[include/litmus/sched_trace.h].
Bugfix: fix Linux execution time accounting in Litmus scheduling class so
that top(1) and ps(1) work again [litmus/sched_litmus.c].
Bugfix: make sure magic sysrq hotkeys do not collide [litmus/litmus.c].
liblitmus: switch to scons build system.
liblitmus: support x86-64->i386 cross compilation.
liblitmus: add cycles tools to simplify measuring of CPU cycles per
second.
liblitmus: support null_call() system call and add null_call tool (for
system call overhead measurements).
liblitmus: improved diagnostic output if setsched fails.
liblitmus: support fractional costs and periods in rtspin.
liblitmus: improve release_ts with -w (wait for all tasks) and -f
(wait for specified number of tasks) options.
liblitmus: remove outdated tests (mode_test, np_test, and wait_test).
liblitmus: remove sched_trace support. The removed code will be part of a
future standalone sched_trace library.
ft_tools: switch to scons build system.
ft_tools: support x86-64->i386 cross compilation.
ft_tools: support for IPI latency measurements (SEND_RESCHED).