Linus Torvalds 17bc14b767 Revert "sched: Update_cfs_shares at period edge" ...

This reverts commit f269ae0469fc882332bdfb5db15d3c1315fe2a10.

It turns out it causes a very noticeable interactivity regression with
CONFIG_SCHED_AUTOGROUP (test-case: "make -j32" of the kernel in a
terminal window, while scrolling in a browser - the autogrouping means
that the two end up in separate cgroups, and the browser should be
smooth as silk despite the high load).

Says Paul Turner:
 "It seems that the update-throttling on the wake-side is reducing the
  interactive tasks' ability to preempt.  While I suspect the right
  longer term answer here is force these updates only in the
  cross-cgroup case; this is less trivial.  For this release I believe
  the right answer is either going to be a revert or restore the updates
  on the enqueue-side."

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Bisected-by: Mike Galbraith <efault@gmx.de>
Acked-by: Paul Turner <pjt@google.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2012-12-14 07:20:43 -08:00

..

debug

KGDB/KDB fixes and cleanups

2012-10-13 11:16:58 +09:00

events

Merge branch 'for-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2012-12-12 08:18:24 -08:00

gcov

gcov: disable CONSTRUCTORS for UML

2011-07-26 16:49:45 -07:00

irq

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

2012-12-11 18:12:06 -08:00

power

Merge branch 'for-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2012-12-12 08:18:24 -08:00

sched

Revert "sched: Update_cfs_shares at period edge"

2012-12-14 07:20:43 -08:00

time

Merge tag 'kvm-3.8-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2012-12-13 15:31:08 -08:00

trace

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2012-12-13 12:00:02 -08:00

.gitignore

…

acct.c

vfs: make path_openat take a struct filename pointer

2012-10-12 20:15:09 -04:00

async.c

[SCSI] async: make async_synchronize_full() flush all work regardless of domain

2012-07-20 09:07:37 +01:00

audit_tree.c

audit: clean up refcounting in audit-tree

2012-08-15 12:55:22 +02:00

audit_watch.c

audit: optimize audit_compare_dname_path

2012-10-12 00:32:02 -04:00

audit.c

fs: handle failed audit_log_start properly

2012-10-09 23:33:37 -04:00

audit.h

audit: optimize audit_compare_dname_path

2012-10-12 00:32:02 -04:00

auditfilter.c

audit: optimize audit_compare_dname_path

2012-10-12 00:32:02 -04:00

auditsc.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal

2012-12-12 12:22:13 -08:00

backtracetest.c

…

bounds.c

memcg: remove direct page_cgroup-to-page pointer

2011-03-23 19:46:28 -07:00

capability.c

userns: Teach inode_capable to understand inodes whose uids map to other namespaces.

2012-05-15 14:59:24 -07:00

cgroup_freezer.c

cgroup: rename ->create/post_create/pre_destroy/destroy() to ->css_alloc/online/offline/free()

2012-11-19 08:13:38 -08:00

cgroup.c

cgroup_rm_file: don't delete the uncreated files

2012-12-06 08:58:11 -08:00

compat.c

new helper: sigsuspend()

2012-05-21 23:52:30 -04:00

configs.c

kernel/configs.c: include MODULE_*() when CONFIG_IKCONFIG_PROC=n

2011-07-25 20:57:15 -07:00

context_tracking.c

context_tracking: New context tracking susbsystem

2012-11-30 11:40:07 -08:00

cpu_pm.c

kernel/cpu_pm.c: fix various typos

2012-05-31 17:49:27 -07:00

cpu.c

Merge branch 'x86-bsp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2012-12-11 19:56:33 -08:00

cpuset.c

cpuset: use N_MEMORY instead N_HIGH_MEMORY

2012-12-12 17:38:32 -08:00

crash_dump.c

Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2011-11-06 19:44:47 -08:00

cred.c

userns: Make credential debugging user namespace safe.

2012-08-23 22:54:18 -07:00

delayacct.c

KVM: Steal time implementation

2011-07-14 12:59:14 +03:00

dma.c

Remove all #inclusions of asm/system.h

2012-03-28 18:30:03 +01:00

elfcore.c

…

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

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal

2012-12-12 12:22:13 -08:00

extable.c

extable: Skip sorting if sorted at build time.

2012-04-19 15:06:55 -07:00

fork.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal

2012-12-12 12:22:13 -08:00

freezer.c

freezer: change ptrace_stop/do_signal_stop to use freezable_schedule()

2012-10-26 14:27:49 -07:00

futex_compat.c

futex: Mark get_robust_list as deprecated

2012-03-29 11:37:17 +02:00

futex.c

futex: avoid wake_futex() for a PI futex_q

2012-11-26 17:41:24 -08:00

groups.c

userns: Convert in_group_p and in_egroup_p to use kgid_t

2012-05-03 03:29:33 -07:00

hrtimer.c

hrtimer: Update hrtimer base offsets each hrtimer_interrupt

2012-07-11 23:34:39 +02:00

hung_task.c

hung task debugging: Inject NMI when hung and going to panic

2012-04-25 12:39:25 +02:00

irq_work.c

irq_work: fix compile failure on tile from missing include

2012-04-13 13:15:16 -04:00

itimer.c

itimer: Use printk_once instead of WARN_ONCE

2012-04-10 11:00:30 +02:00

jump_label.c

jump_label: Export jump_label_rate_limit()

2012-08-06 19:00:35 +03:00

kallsyms.c

vsprintf: fix %ps on non symbols when using kallsyms

2012-05-29 16:22:32 -07:00

kcmp.c

syscalls, x86: add __NR_kcmp syscall

2012-05-31 17:49:32 -07:00

Kconfig.freezer

…

Kconfig.hz

…

Kconfig.locks

locking: Adjust spin lock inlining Kconfig options

2012-09-13 17:56:13 +02:00

Kconfig.preempt

locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage

2012-03-23 13:18:57 +01:00

kexec.c

kdump: remove unneeded include

2012-10-06 03:05:19 +09:00

kfifo.c

[media] kernel:kfifo: export __kfifo_max_r symbol

2012-04-11 18:24:37 -03:00

kmod.c

infrastructure for saner ret_from_kernel_thread semantics

2012-10-12 13:35:07 -04:00

kprobes.c

kprobes/x86: Fix to support jprobes on ftrace-based kprobe

2012-09-13 22:52:11 -04:00

ksysfs.c

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

2012-12-11 18:10:49 -08:00

kthread.c

kthread: use N_MEMORY instead N_HIGH_MEMORY

2012-12-12 17:38:33 -08:00

latencytop.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

lglock.c

brlocks/lglocks: turn into functions

2012-05-29 23:28:41 -04:00

lockdep_internals.h

…

lockdep_proc.c

lockdep: Use KSYM_NAME_LEN'ed buffer for __get_key_name()

2012-10-24 12:39:09 +02:00

lockdep_states.h

…

lockdep.c

lockdep: Check if nested lock is actually held

2012-09-13 17:00:44 +02:00

Makefile

Merge branch 'rcu/next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu

2012-12-03 06:27:05 +01:00

modsign_pubkey.c

modsign: add symbol prefix to certificate list

2012-12-03 13:06:25 +10:30

module_signing.c

MODSIGN: Don't use enum-type bitfields in module signature info block

2012-12-05 11:27:24 +10:30

module-internal.h

MODSIGN: Move the magic string to the end of a module and eliminate the search

2012-10-19 17:30:40 -07:00

module.c

module: fix out-by-one error in kallsyms

2012-10-31 13:56:37 +10:30

mutex-debug.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

mutex-debug.h

mutex: Use p->on_cpu for the adaptive spin

2011-04-14 08:52:33 +02:00

mutex.c

sched/rt: Use schedule_preempt_disabled()

2012-03-01 10:28:03 +01:00

mutex.h

mutex: Use p->on_cpu for the adaptive spin

2011-04-14 08:52:33 +02:00

notifier.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

nsproxy.c

userns: make each net (net_ns) belong to a user_ns

2012-11-18 20:30:55 -05:00

padata.c

padata: Fix cpu hotplug

2012-03-29 19:52:46 +08:00

panic.c

panic: fix a possible deadlock in panic()

2012-07-30 17:25:13 -07:00

params.c

params: replace printk(KERN_<LVL>...) with pr_<lvl>(...)

2012-05-04 17:28:18 -07:00

pid_namespace.c

pidns: limit the nesting depth of pid namespaces

2012-10-25 14:37:53 -07:00

pid.c

propagate name change to comments in kernel source

2012-12-06 10:39:54 +01:00

posix-cpu-timers.c

cputime: Move thread_group_cputime() to sched code

2012-11-28 17:07:38 +01:00

posix-timers.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

printk.c

console: use might_sleep in console_lock

2012-10-23 20:14:55 -07:00

profile.c

propagate name change to comments in kernel source

2012-12-06 10:39:54 +01:00

ptrace.c

ptrace: mark __ptrace_may_access() static

2012-08-03 14:47:17 +10:00

range.c

range: fix bogus misuse of module.h to get printk()

2011-10-31 09:20:11 -04:00

rcu.h

rcu: Add a module parameter to force use of expedited RCU primitives

2012-10-23 14:54:08 -07:00

rcupdate.c

rcu: Add a module parameter to force use of expedited RCU primitives

2012-10-23 14:54:08 -07:00

rcutiny_plugin.h

rcu: Add a module parameter to force use of expedited RCU primitives

2012-10-23 14:54:08 -07:00

rcutiny.c

rcu: Fix TINY_RCU rcu_is_cpu_rrupt_from_idle check

2012-11-13 14:08:34 -08:00

rcutorture.c

Merge branches 'urgent.2012.10.27a', 'doc.2012.11.16a', 'fixes.2012.11.13a', 'srcu.2012.10.27a', 'stall.2012.11.13a', 'tracing.2012.11.08a' and 'idle.2012.10.24a' into HEAD

2012-11-16 09:59:58 -08:00

rcutree_plugin.h

rcu: Separate accounting of callbacks from callback-free CPUs

2012-11-16 10:05:57 -08:00

rcutree_trace.c

rcu: Separate accounting of callbacks from callback-free CPUs

2012-11-16 10:05:57 -08:00

rcutree.c

context_tracking: New context tracking susbsystem

2012-11-30 11:40:07 -08:00

rcutree.h

rcu: Separate accounting of callbacks from callback-free CPUs

2012-11-16 10:05:57 -08:00

relay.c

splice: fix racy pipe->buffers uses

2012-06-13 21:16:42 +02:00

res_counter.c

res_counter: delete res_counter_write()

2012-12-12 17:38:33 -08:00

resource.c

kernel/resource.c: fix stack overflow in __reserve_region_with_split()

2012-10-06 03:05:31 +09:00

rtmutex_common.h

rtmutex: Simplify PI algorithm and make highest prio task get lock

2011-01-27 21:13:51 -05:00

rtmutex-debug.c

lockdep, rtmutex, bug: Show taint flags on error

2011-12-06 08:16:49 +01:00

rtmutex-debug.h

…

rtmutex-tester.c

rtmutex-tester: convert sysdev_class to a regular subsystem

2011-12-14 14:54:22 -08:00

rtmutex.c

Revert "rcu: Permit rt_mutex_unlock() with irqs disabled"

2011-12-11 10:33:18 -08:00

rtmutex.h

…

rwsem.c

Remove all #inclusions of asm/system.h

2012-03-28 18:30:03 +01:00

seccomp.c

seccomp: fix build warnings when there is no CONFIG_SECCOMP_FILTER

2012-04-18 12:24:52 +10:00

semaphore.c

semaphore: fix improper comment reference to mutex

2012-04-05 17:15:55 -07:00

signal.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal

2012-12-12 12:22:13 -08:00

smp.c

smp: Remove ipi_call_lock[_irq]()/ipi_call_unlock[_irq]()

2012-06-05 17:27:14 +02:00

smpboot.c

hotplug: Fix UP bug in smpboot hotplug code

2012-08-13 17:01:07 +02:00

smpboot.h

smpboot: Provide infrastructure for percpu hotplug threads

2012-08-13 17:01:07 +02:00

softirq.c

cputime: Specialize irq vtime hooks

2012-10-29 21:31:32 +01:00

spinlock.c

locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage

2012-03-23 13:18:57 +01:00

srcu.c

Merge branches 'urgent.2012.10.27a', 'doc.2012.11.16a', 'fixes.2012.11.13a', 'srcu.2012.10.27a', 'stall.2012.11.13a', 'tracing.2012.11.08a' and 'idle.2012.10.24a' into HEAD

2012-11-16 09:59:58 -08:00

stacktrace.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

stop_machine.c

Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2011-11-06 19:44:47 -08:00

sys_ni.c

syscalls, x86: add __NR_kcmp syscall

2012-05-31 17:49:32 -07:00

sys.c

cputime: Rename thread_group_times to thread_group_cputime_adjusted

2012-11-28 17:07:57 +01:00

sysctl_binary.c

mm: prepare for removal of obsolete /proc/sys/vm/nr_pdflush_threads

2012-07-31 18:42:40 -07:00

sysctl.c

Revert "sched/autogroup: Fix crash on reboot when autogroup is disabled"

2012-12-11 10:23:45 +01:00

task_work.c

task_work: task_work_add() should not succeed after exit_task_work()

2012-09-13 16:47:34 +02:00

taskstats.c

taskstats: cgroupstats_user_cmd() may leak on error

2012-10-06 03:05:31 +09:00

test_kprobes.c

kprobes: Fix selftest to clear flags field for reusing probes

2010-10-14 08:55:27 +02:00

time.c

time: Move update_vsyscall definitions to timekeeper_internal.h

2012-09-24 12:38:06 -04:00

timeconst.pl

…

timer.c

timers: Fix endless looping between cascade() and internal_add_timer()

2012-10-09 21:27:14 +02:00

tracepoint.c

static keys: Introduce 'struct static_key', static_key_true()/false() and static_key_slow_[inc|dec]()

2012-02-24 10:05:59 +01:00

tsacct.c

userns: Convert taskstats to handle the user and pid namespaces.

2012-09-18 01:01:32 -07:00

uid16.c

userns: Convert setting and getting uid and gid system calls to use kuid and kgid

2012-05-03 03:28:41 -07:00

up.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

user_namespace.c

userns: Add kprojid_t and associated infrastructure in projid.h

2012-09-18 01:01:37 -07:00

user-return-notifier.c

kernel: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

user.c

userns: Add kprojid_t and associated infrastructure in projid.h

2012-09-18 01:01:37 -07:00

utsname_sysctl.c

Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2011-11-06 19:44:47 -08:00

utsname.c

userns: Use cred->user_ns instead of cred->user->user_ns

2012-04-07 16:55:51 -07:00

wait.c

propagate name change to comments in kernel source

2012-12-06 10:39:54 +01:00

watchdog.c

watchdog: Fix CPU hotplug regression

2012-12-04 19:56:59 +01:00

workqueue_sched.h

workqueue: implement concurrency managed dynamic worker pool

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

workqueue.c

Merge branch 'for-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

2012-12-12 08:15:13 -08:00