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8f45e2b516201d1bf681e6026fa5276385def565
linux/kernel
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Gregory Haskins 8f45e2b516 sched: make double-lock-balance fair 
double_lock balance() currently favors logically lower cpus since they
often do not have to release their own lock to acquire a second lock.
The result is that logically higher cpus can get starved when there is
a lot of pressure on the RQs.  This can result in higher latencies on
higher cpu-ids.

This patch makes the algorithm more fair by forcing all paths to have
to release both locks before acquiring them again.  Since callsites to
double_lock_balance already consider it a potential preemption/reschedule
point, they have the proper logic to recheck for atomicity violations.

Signed-off-by: Gregory Haskins <ghaskins@novell.com>
2008-12-29 09:39:51 -05:00
..
irq
Merge branch 'irq/sparseirq' into cpus4096
2008-12-17 13:16:08 +01:00
power
Merge branch 'sched/core' into cpus4096
2008-12-12 13:48:57 +01:00
time
Merge ../linux-2.6-x86
2008-12-13 21:55:51 +10:30
trace
Merge ../linux-2.6-x86
2008-12-13 21:55:51 +10:30
.gitignore
…
acct.c
tty: Fix abusers of current->sighand->tty
2008-10-13 09:51:42 -07:00
audit_tree.c
Fix inotify watch removal/umount races
2008-11-15 12:26:44 -08:00
audit.c
[PATCH] fix broken timestamps in AVC generated by kernel threads
2008-12-09 02:27:41 -05:00
audit.h
…
auditfilter.c
Fix inotify watch removal/umount races
2008-11-15 12:26:44 -08:00
auditsc.c
[PATCH] fix broken timestamps in AVC generated by kernel threads
2008-12-09 02:27:41 -05:00
backtracetest.c
…
bounds.c
…
capability.c
security: Fix setting of PF_SUPERPRIV by __capable()
2008-08-14 22:59:43 +10:00
cgroup_debug.c
cgroups: fix probable race with put_css_set[_taskexit] and find_css_set
2008-10-20 08:52:38 -07:00
cgroup_freezer.c
freezer_cg: disable writing freezer.state of root cgroup
2008-11-12 17:17:16 -08:00
cgroup.c
cgroups: fix a race between rmdir and remount
2008-12-15 16:27:07 -08:00
compat.c
Merge branches 'timers/clocksource', 'timers/hrtimers', 'timers/nohz', 'timers/ntp', 'timers/posixtimers' and 'timers/debug' into v28-timers-for-linus
2008-10-20 13:14:06 +02:00
configs.c
kernel/configs.c: remove useless comments
2008-10-20 08:52:34 -07:00
cpu.c
cpumask: centralize cpu_online_map and cpu_possible_map
2008-12-13 21:19:41 +10:30
cpuset.c
cpumask: change cpumask_scnprintf, cpumask_parse_user, cpulist_parse, and cpulist_scnprintf to take pointers.
2008-12-13 21:20:25 +10:30
delayacct.c
per-task-delay-accounting: update taskstats for memory reclaim delay
2008-07-25 10:53:47 -07:00
dma-coherent.c
dma-coherent: export dma_[alloc|release]_from_coherent methods
2008-08-22 08:34:53 +02:00
dma.c
kernel/dma.c: remove a CVS keyword
2008-10-16 11:21:30 -07:00
exec_domain.c
proc: move /proc/execdomains to kernel/exec_domain.c
2008-10-23 14:30:41 +04:00
exit.c
Merge branches 'sched/core', 'core/core' and 'tracing/core' into cpus4096
2008-11-24 17:46:57 +01:00
extable.c
Merge branch 'tracing/fastboot' into cpus4096
2008-12-12 12:43:05 +01:00
fork.c
Merge branch 'sched/core' into cpus4096
2008-12-12 13:48:57 +01:00
freezer.c
freezer_cg: use thaw_process() in unfreeze_cgroup()
2008-10-30 11:38:45 -07:00
futex_compat.c
…
futex.c
Merge branches 'core/debug', 'core/futexes', 'core/locking', 'core/rcu', 'core/signal', 'core/urgent' and 'core/xen' into core/core
2008-11-24 17:44:55 +01:00
hrtimer.c
hrtimer: clean up unused callback modes
2008-11-12 09:54:40 +01:00
itimer.c
timers: fix itimer/many thread hang
2008-09-14 16:25:35 +02:00
kallsyms.c
sprint_symbol(): use less stack
2008-11-19 18:49:58 -08:00
Kconfig.freezer
container freezer: implement freezer cgroup subsystem
2008-10-20 08:52:34 -07:00
Kconfig.hz
sched: fix SCHED_HRTICK dependency
2008-07-28 14:37:38 +02:00
Kconfig.preempt
…
kexec.c
kexec: fix crash_save_vmcoreinfo_init build problem
2008-10-20 15:28:50 -07:00
kfifo.c
…
kgdb.c
kgdb: call touch_softlockup_watchdog on resume
2008-10-06 13:50:59 -05:00
kmod.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
2008-10-16 12:38:34 -07:00
kprobes.c
kernel/kprobes.c: don't pad kretprobe_table_locks[] on uniprocessor builds
2008-11-12 17:17:17 -08:00
ksysfs.c
profiling: dynamically enable readprofile at runtime
2008-10-16 11:21:31 -07:00
kthread.c
tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()
2008-11-16 09:01:36 +01:00
latencytop.c
KSYM_SYMBOL_LEN fixes
2008-12-10 08:01:54 -08:00
lockdep_internals.h
lockdep: build fix
2008-08-13 12:55:10 +02:00
lockdep_proc.c
lockstat: contend with points
2008-10-20 15:43:10 +02:00
lockdep.c
Merge branch 'tracing/fastboot' into cpus4096
2008-12-12 12:43:05 +01:00
Makefile
Merge branch 'tracing/fastboot' into cpus4096
2008-12-12 12:43:05 +01:00
marker.c
markers/tracpoints: fix non-modular build
2008-11-16 09:52:03 +01:00
module.c
tracing/function-graph-tracer: introduce __notrace_funcgraph to filter special functions
2008-12-08 15:11:44 +01:00
mutex-debug.c
…
mutex-debug.h
…
mutex.c
mutex: __used is needed for function referenced only from inline asm
2008-11-24 10:00:28 +01:00
mutex.h
…
notifier.c
Merge branches 'core/debug', 'core/futexes', 'core/locking', 'core/rcu', 'core/signal', 'core/urgent' and 'core/xen' into core/core
2008-11-24 17:44:55 +01:00
ns_cgroup.c
cgroup_clone: use pid of newly created task for new cgroup
2008-07-25 10:53:37 -07:00
nsproxy.c
removed unused #include <linux/version.h>'s
2008-08-23 12:14:12 -07:00
panic.c
taint: add missing comment
2008-12-01 19:55:24 -08:00
params.c
Fix compile warning in kernel/params.c
2008-10-23 12:09:00 -07:00
pid_namespace.c
pid_ns: (BUG 11391) change ->child_reaper when init->group_leader exits
2008-09-02 19:21:38 -07:00
pid.c
pidns: remove now unused find_pid function.
2008-07-25 10:53:45 -07:00
pm_qos_params.c
pm_qos_requirement might sleep
2008-09-02 19:21:40 -07:00
posix-cpu-timers.c
Merge branch 'sched/core' into cpus4096
2008-12-12 13:48:57 +01:00
posix-timers.c
Merge branch 'timers/range-hrtimers' into v28-range-hrtimers-for-linus-v2
2008-10-22 09:48:06 +02:00
printk.c
printk: remove unused code from kernel/printk.c
2008-10-23 21:54:29 +02:00
profile.c
Merge ../linux-2.6-x86
2008-12-13 21:55:51 +10:30
ptrace.c
remove __ARCH_WANT_COMPAT_SYS_PTRACE
2008-11-30 11:00:15 -08:00
rcuclassic.c
sched: convert nohz_cpu_mask to cpumask_var_t.
2008-11-24 17:51:10 +01:00
rcupdate.c
rcupdate: fix bug of rcu_barrier*()
2008-10-21 15:59:53 +02:00
rcupreempt_trace.c
rcu: trace fix possible mem-leak
2008-08-15 17:54:40 +02:00
rcupreempt.c
byteorder: remove direct includes of linux/byteorder/swab[b].h
2008-10-20 08:52:40 -07:00
rcutorture.c
byteorder: remove direct includes of linux/byteorder/swab[b].h
2008-10-20 12:51:53 -07:00
relay.c
relayfs: fix infinite loop with splice()
2008-12-10 08:01:52 -08:00
res_counter.c
cgroup files: convert res_counter_write() to be a cgroups write_string() handler
2008-07-25 10:53:36 -07:00
resource.c
reserve_region_with_split: Fix GFP_KERNEL usage under spinlock
2008-11-01 09:53:58 -07:00
rtmutex_common.h
…
rtmutex-debug.c
…
rtmutex-debug.h
…
rtmutex-tester.c
…
rtmutex.c
hrtimer: convert kernel/* to the new hrtimer apis
2008-09-05 21:35:13 -07:00
rtmutex.h
…
rwsem.c
…
sched_clock.c
Revert "sched_clock: prevent scd->clock from moving backwards"
2008-12-14 16:23:17 -08:00
sched_cpupri.c
sched: convert struct cpupri_vec cpumask_var_t.
2008-11-24 17:52:22 +01:00
sched_cpupri.h
sched: convert struct cpupri_vec cpumask_var_t.
2008-11-24 17:52:22 +01:00
sched_debug.c
sched: add uid information to sched_debug for CONFIG_USER_SCHED
2008-12-01 20:39:50 +01:00
sched_fair.c
sched: bias task wakeups to preferred semi-idle packages
2008-12-19 09:21:52 +01:00
sched_features.h
sched: backward looking buddy
2008-11-05 10:30:14 +01:00
sched_idletask.c
sched: add CONFIG_SMP consistency
2008-10-22 10:01:52 +02:00
sched_rt.c
sched: only try to push a task on wakeup if it is migratable
2008-12-29 09:39:50 -05:00
sched_stats.h
Merge ../linux-2.6-x86
2008-12-13 21:55:51 +10:30
sched.c
sched: make double-lock-balance fair
2008-12-29 09:39:51 -05:00
seccomp.c
…
semaphore.c
semaphore: __down_common: use signal_pending_state()
2008-08-05 14:33:47 -07:00
signal.c
tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()
2008-11-16 09:01:36 +01:00
smp.c
generic-ipi: fix the smp_mb() placement
2008-11-06 08:41:56 +01:00
softirq.c
irq: call __irq_enter() before calling the tick_idle_check
2008-11-10 22:36:39 +01:00
softlockup.c
Merge branch 'sched/core' into cpus4096
2008-12-12 13:48:57 +01:00
spinlock.c
lockdep: spin_lock_nest_lock(), checkpatch fixes
2008-08-13 13:56:51 +02:00
srcu.c
…
stacktrace.c
…
stop_machine.c
stop_machine: fix race with return value (fixes Bug #11989)
2008-11-16 15:09:52 -08:00
sys_ni.c
reintroduce accept4
2008-11-19 18:49:57 -08:00
sys.c
thread_group_cputime: move a couple of callsites outside of ->siglock
2008-11-17 16:55:55 +01:00
sysctl_check.c
sysctl: check for bogus modes
2008-07-25 10:53:45 -07:00
sysctl.c
Merge commit 'v2.6.28-rc7' into tracing/core
2008-12-04 09:07:19 +01:00
taskstats.c
cpumask: change cpumask_scnprintf, cpumask_parse_user, cpulist_parse, and cpulist_scnprintf to take pointers.
2008-12-13 21:20:25 +10:30
test_kprobes.c
…
time.c
select: add a timespec_add_safe() function
2008-09-05 21:34:57 -07:00
timeconst.pl
…
timer.c
Add round_jiffies_up and related routines
2008-11-06 08:42:48 +01:00
tracepoint.c
markers/tracpoints: fix non-modular build
2008-11-16 09:52:03 +01:00
tsacct.c
task IO accounting: move all IO statistics in struct task_io_accounting
2008-07-27 16:12:28 -07:00
uid16.c
…
user_namespace.c
removed unused #include <linux/version.h>'s
2008-08-23 12:14:12 -07:00
user.c
sched: add uid information to sched_debug for CONFIG_USER_SCHED
2008-12-01 20:39:50 +01:00
utsname_sysctl.c
sysctl: simplify ->strategy
2008-10-16 11:21:47 -07:00
utsname.c
removed unused #include <linux/version.h>'s
2008-08-23 12:14:12 -07:00
wait.c
wait: kill is_sync_wait()
2008-10-16 11:21:31 -07:00
workqueue.c
cpumask: introduce new API, without changing anything
2008-11-06 09:05:33 +01:00