Nikhil Rao 2582f0eba5 sched: Set group_imb only a task can be pulled from the busiest cpu ...

When cycling through sched groups to determine the busiest group, set
group_imb only if the busiest cpu has more than 1 runnable task. This patch
fixes the case where two cpus in a group have one runnable task each, but there
is a large weight differential between these two tasks. The load balancer is
unable to migrate any task from this group, and hence do not consider this
group to be imbalanced.

Signed-off-by: Nikhil Rao <ncrao@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1286996978-7007-3-git-send-email-ncrao@google.com>
[ small code readability edits ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2010-10-18 20:52:17 +02:00

..

debug

Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2010-09-08 11:13:42 -07:00

gcov

gcov: fix null-pointer dereference for certain module types

2010-09-09 18:57:23 -07:00

irq

irq: Add new IRQ flag IRQF_NO_SUSPEND

2010-07-29 13:24:57 +02:00

power

Merge branch 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6

2010-09-11 15:50:53 -07:00

time

time: Workaround gcc loop optimization that causes 64bit div errors

2010-08-13 12:03:24 -07:00

trace

ring-buffer: Fix typo of time extends per page

2010-10-12 12:06:43 -04:00

.gitignore

…

acct.c

pass a struct path to vfs_statfs

2010-08-09 16:48:42 -04:00

async.c

async: use workqueue for worker pool

2010-07-14 11:29:46 +02:00

audit_tree.c

fanotify: use both marks when possible

2010-07-28 10:18:55 -04:00

audit_watch.c

Revert "fsnotify: store struct file not struct path"

2010-08-12 14:23:04 -07:00

audit.c

Merge branch 'for-linus' of git://git.infradead.org/users/eparis/notify

2010-08-10 11:39:13 -07:00

audit.h

Audit: split audit watch Kconfig

2010-07-28 09:58:19 -04:00

auditfilter.c

audit: do not get and put just to free a watch

2010-07-28 09:58:17 -04:00

auditsc.c

vfs: add helpers to get root and pwd

2010-08-11 00:28:20 -04:00

backtracetest.c

…

bounds.c

kbuild: move bounds.h to include/generated

2009-12-12 13:08:14 +01:00

capability.c

sched: Remove remaining USER_SCHED code

2010-04-02 20:12:00 +02:00

cgroup_freezer.c

Freezer / cgroup freezer: Update stale locking comments

2010-05-10 23:18:47 +02:00

cgroup.c

cgroups: fix API thinko

2010-09-09 18:57:23 -07:00

compat.c

compat: Make compat_alloc_user_space() incorporate the access_ok()

2010-09-14 16:08:45 -07:00

configs.c

…

cpu.c

sched: adjust when cpu_active and cpuset configurations are updated during cpu on/offlining

2010-06-08 21:40:36 +02:00

cpuset.c

Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2010-08-06 09:39:22 -07:00

cred.c

Add a dummy printk function for the maintenance of unused printks

2010-08-12 09:51:35 -07:00

delayacct.c

…

dma.c

…

early_res.c

kmemleak: Add support for NO_BOOTMEM configurations

2010-07-19 11:54:15 +01:00

elfcore.c

elf coredump: add extended numbering support

2010-03-06 11:26:46 -08:00

exec_domain.c

sys_personality: remove the bogus checks in sys_personality()->__set_personality() path

2010-08-09 20:45:05 -07:00

exit.c

Fix unprotected access to task credentials in waitid()

2010-08-17 18:07:43 -07:00

extable.c

…

fork.c

rmap: fix walk during fork

2010-09-22 17:22:39 -07:00

freezer.c

…

futex_compat.c

futex: Protect pid lookup in compat code with RCU

2009-12-09 14:22:14 +01:00

futex.c

futex: futex_find_get_task remove credentails check

2010-06-30 15:43:44 -07:00

groups.c

kernel/groups.c: fix integer overflow in groups_search

2010-09-09 18:57:24 -07:00

hrtimer.c

gcc-4.6: kernel/*: Fix unused but set warnings

2010-09-05 14:36:58 +02:00

hung_task.c

softlockup: Fix hung_task_check_count sysctl

2009-11-27 06:21:57 +01:00

hw_breakpoint.c

hw breakpoints: Fix pid namespace bug

2010-09-17 04:42:59 +02:00

itimer.c

itimers: Fix racy writes to cpu_itimer fields

2009-11-18 16:32:12 +01:00

kallsyms.c

kdb: core for kgdb back end (2 of 2)

2010-05-20 21:04:21 -05:00

Kconfig.freezer

…

Kconfig.hz

…

Kconfig.locks

mutex: Better control mutex adaptive spinning config

2009-12-03 11:50:11 +01:00

Kconfig.preempt

…

kexec.c

kexec: return -EFAULT on copy_to_user() failures

2010-08-11 08:59:22 -07:00

kfifo.c

kfifo: fix scatterlist usage

2010-10-01 10:50:58 -07:00

kmod.c

Make do_execve() take a const filename pointer

2010-08-17 18:07:43 -07:00

kprobes.c

kprobes: Move enable/disable_kprobe() out from debugfs code

2010-05-08 18:08:30 +02:00

ksysfs.c

sysfs: add struct file* to bin_attr callbacks

2010-05-21 09:37:31 -07:00

kthread.c

kthread: implement kthread_data()

2010-06-29 10:07:09 +02:00

latencytop.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

lockdep_internals.h

lockdep: No need to disable preemption in debug atomic ops

2010-05-04 05:38:16 +02:00

lockdep_proc.c

lockstat: Make lockstat counting per cpu

2010-04-06 00:15:37 +02:00

lockdep_states.h

…

lockdep.c

sched_clock: Add local_clock() API and improve documentation

2010-06-09 10:34:49 +02:00

Makefile

Merge branch 'for-linus' of git://git.infradead.org/users/eparis/notify

2010-08-10 11:39:13 -07:00

module.c

modules: Fix module_bug_list list corruption race

2010-10-05 11:29:27 -07:00

mutex-debug.c

…

mutex-debug.h

locking: Implement new raw_spinlock

2009-12-14 23:55:32 +01:00

mutex.c

mutex: Fix annotations to include it in kernel-locking docbook

2010-09-03 08:19:51 +02:00

mutex.h

…

notifier.c

sched: Use lockdep-based checking on rcu_dereference()

2010-02-25 10:34:26 +01:00

ns_cgroup.c

…

nsproxy.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

padata.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

2010-08-04 15:23:14 -07:00

panic.c

lib/bug.c: add oops end marker to WARN implementation

2010-08-11 08:59:22 -07:00

params.c

param: locking for kernel parameters

2010-08-11 23:04:20 +09:30

perf_event.c

perf: Fix incorrect copy_from_user() usage

2010-10-12 11:45:01 +02:00

pid_namespace.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

pid.c

pids: alloc_pidmap: remove the unnecessary boundary checks

2010-08-11 08:59:20 -07:00

pm_qos_params.c

PM QoS: Correct pr_debug() misuse and improve parameter checks

2010-09-11 00:53:05 +02:00

posix-cpu-timers.c

Merge branch 'writable_limits' of git://decibel.fi.muni.cz/~xslaby/linux

2010-08-10 12:07:51 -07:00

posix-timers.c

posix_timer: Move copy_to_user(created_timer_id) down in timer_create()

2010-07-23 15:08:12 +02:00

printk.c

gcc-4.6: printk: use stable variable to dump kmsg buffer

2010-08-09 20:45:06 -07:00

profile.c

numa: in-kernel profiling: use cpu_to_mem() for per cpu allocations

2010-05-27 09:12:57 -07:00

ptrace.c

ptrace: optimize exit_ptrace() for the likely case

2010-08-11 08:59:19 -07:00

range.c

kernel/range: remove unused definition of ARRAY_SIZE()

2010-08-09 20:45:06 -07:00

rcupdate.c

tree/tiny rcu: Add debug RCU head objects

2010-06-14 16:37:26 -07:00

rcutiny_plugin.h

rcu: slim down rcutiny by removing rcu_scheduler_active and friends

2010-05-10 11:08:34 -07:00

rcutiny.c

tree/tiny rcu: Add debug RCU head objects

2010-06-14 16:37:26 -07:00

rcutorture.c

sched_clock: Add local_clock() API and improve documentation

2010-06-09 10:34:49 +02:00

rcutree_plugin.h

rcu: remove all rcu head initializations, except on_stack initializations

2010-05-11 16:10:47 -07:00

rcutree_trace.c

rcu: reduce the number of spurious RCU_SOFTIRQ invocations

2010-05-10 11:08:35 -07:00

rcutree.c

tree/tiny rcu: Add debug RCU head objects

2010-06-14 16:37:26 -07:00

rcutree.h

rcu: reduce the number of spurious RCU_SOFTIRQ invocations

2010-05-10 11:08:35 -07:00

relay.c

kernel/: convert cpu notifier to return encapsulate errno value

2010-05-27 09:12:48 -07:00

res_counter.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

resource.c

resource: shared I/O region support

2010-05-11 12:01:10 -07:00

rtmutex_common.h

…

rtmutex-debug.c

sched: Convert pi_lock to raw_spinlock

2009-12-14 23:55:33 +01:00

rtmutex-debug.h

…

rtmutex-tester.c

…

rtmutex.c

rtmutes: Convert rtmutex.lock to raw_spinlock

2009-12-14 23:55:33 +01:00

rtmutex.h

…

rwsem.c

…

sched_clock.c

sched_clock: Add local_clock() API and improve documentation

2010-06-09 10:34:49 +02:00

sched_cpupri.c

sched: No need for bootmem special cases

2010-07-17 12:06:22 +02:00

sched_cpupri.h

sched: No need for bootmem special cases

2010-07-17 12:06:22 +02:00

sched_debug.c

sched: Use correct macro to display sched_child_runs_first in /proc/sched_debug

2010-07-21 21:46:12 +02:00

sched_fair.c

sched: Set group_imb only a task can be pulled from the busiest cpu

2010-10-18 20:52:17 +02:00

sched_features.h

sched: Remove ASYM_GRAN feature

2010-03-11 18:32:53 +01:00

sched_idletask.c

sched: Cure load average vs NO_HZ woes

2010-04-23 11:02:02 +02:00

sched_rt.c

sched: Unindent labels

2010-10-18 18:41:56 +02:00

sched_stats.h

sched: Remove the obsolete exit_state/signal hacks

2010-06-18 10:46:56 +02:00

sched_stoptask.c

sched: Create special class for stop/migrate work

2010-10-18 18:41:58 +02:00

sched.c

sched: Do not consider SCHED_IDLE tasks to be cache hot

2010-10-18 20:52:15 +02:00

seccomp.c

…

semaphore.c

…

signal.c

HWPOISON: Copy si_addr_lsb to user

2010-10-07 09:41:25 +02:00

smp.c

generic-ipi: Fix deadlock in __smp_call_function_single

2010-09-10 16:48:40 +02:00

softirq.c

kernel/: fix BUG_ON checks for cpu notifier callbacks direct call

2010-06-04 15:21:45 -07:00

spinlock.c

locking: Cleanup the name space completely

2009-12-14 23:55:33 +01:00

srcu.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

stacktrace.c

…

stop_machine.c

sched: Create special class for stop/migrate work

2010-10-18 18:41:58 +02:00

sys_ni.c

fanotify: sys_fanotify_mark declartion

2010-07-28 09:58:55 -04:00

sys.c

pid: make setpgid() system call use RCU read-side critical section

2010-08-31 17:00:18 -07:00

sysctl_binary.c

sysctl: don't use own implementation of hex_to_bin()

2010-05-25 08:07:05 -07:00

sysctl_check.c

ipv4 05/05: add sysctl to accept packets with local source addresses

2009-12-03 12:14:38 -08:00

sysctl.c

sysctl: fix min/max handling in __do_proc_doulongvec_minmax()

2010-10-07 13:31:21 -07:00

taskstats.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

test_kprobes.c

…

time.c

time: Kill off CONFIG_GENERIC_TIME

2010-07-27 12:40:54 +02:00

timeconst.pl

…

timer.c

kernel/timer.c: fix kernel-doc function parameter warning

2010-08-10 15:33:09 -07:00

tracepoint.c

tracing: Let tracepoints have data passed to tracepoint callbacks

2010-05-14 09:50:34 -04:00

tsacct.c

mm: clean up mm_counter

2010-03-06 11:26:23 -08:00

uid16.c

…

up.c

…

user_namespace.c

user_ns: Introduce user_nsmap_uid and user_ns_map_gid.

2010-06-16 14:55:34 -07:00

user-return-notifier.c

core: Clean up user return notifers use of per_cpu

2009-12-02 10:22:59 +01:00

user.c

sched: Remove a stale comment

2010-05-10 08:48:39 +02:00

utsname_sysctl.c

…

utsname.c

…

wait.c

…

watchdog.c

lockup_detector: Sync touch_*_watchdog back to old semantics

2010-09-01 10:02:28 +02:00

workqueue_sched.h

workqueue: implement concurrency managed dynamic worker pool

2010-06-29 10:07:14 +02:00

workqueue.c

workqueue: add documentation

2010-09-13 10:26:52 +02:00