Ingo Molnar
e4e4e534fa
sched clock: revert various sched_clock() changes
...
Found an interactivity problem on a quad core test-system - simple
CPU loops would occasionally delay the system un an unacceptable way.
After much debugging with Peter Zijlstra it turned out that the problem
is caused by the string of sched_clock() changes - they caused the CPU
clock to jump backwards a bit - which confuses the scheduler arithmetics.
(which is unsigned for performance reasons)
So revert:
# c300ba2 : sched_clock: and multiplier for TSC to gtod drift
# c0c8773 : sched_clock: only update deltas with local reads.
# af52a90 : sched_clock: stop maximum check on NO HZ
# f7cce27 : sched_clock: widen the max and min time
This solves the interactivity problems.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Mike Galbraith <efault@gmx.de>
2008-07-31 17:20:29 +02:00
..
irq
use WARN() in kernel/irq/chip.c
2008-07-26 12:00:07 -07:00
power
kexec jump: save/restore device state
2008-07-26 12:00:04 -07:00
time
sched clock: revert various sched_clock() changes
2008-07-31 17:20:29 +02:00
trace
Merge branch 'linus' into cpus4096
2008-07-28 23:32:00 +02:00
.gitignore
acct.c
bsdacct: fix and add comments around acct_process()
2008-07-25 10:53:47 -07:00
audit.c
[PATCH] remove useless argument type in audit_filter_user()
2008-06-24 23:36:35 -04:00
audit.h
audit_tree.c
auditfilter.c
[PATCH] remove useless argument type in audit_filter_user()
2008-06-24 23:36:35 -04:00
auditsc.c
x86_64 syscall audit fast-path
2008-07-23 17:47:32 -07:00
backtracetest.c
backtrace: replace timer with tasklet + completions
2008-06-27 18:09:16 +02:00
bounds.c
capability.c
security: filesystem capabilities refactor kernel code
2008-07-24 10:47:22 -07:00
cgroup.c
[PATCH] get rid of indirect users of namei.h
2008-07-26 20:53:42 -04:00
cgroup_debug.c
compat.c
configs.c
cpu.c
Merge branch 'linus' into cpus4096
2008-07-28 23:32:00 +02:00
cpuset.c
cpuset: two minor code-cleanups
2008-07-25 10:53:38 -07:00
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: add documentation to new interfaces
2008-07-20 21:22:00 +02:00
dma.c
exec_domain.c
[PATCH] kill altroot
2008-07-26 20:53:20 -04:00
exit.c
task IO accounting: improve code readability
2008-07-27 09:58:20 -07:00
extable.c
fork.c
mmu-notifiers: core
2008-07-28 16:30:21 -07:00
futex.c
futexes: fix fault handling in futex_lock_pi
2008-06-23 13:31:15 +02:00
futex_compat.c
hrtimer.c
Merge branch 'generic-ipi' into generic-ipi-for-linus
2008-07-15 21:55:59 +02:00
itimer.c
kallsyms.c
kallsyms: fix potential overflow in binary search
2008-07-25 10:53:27 -07:00
Kconfig.hz
sched: fix SCHED_HRTICK dependency
2008-07-28 14:37:38 +02:00
Kconfig.preempt
kexec.c
kexec jump: save/restore device state
2008-07-26 12:00:04 -07:00
kfifo.c
kgdb.c
kgdb: sparse fix
2008-06-24 10:52:55 -05:00
kmod.c
call_usermodehelper(): increase reliability
2008-07-25 10:53:28 -07:00
kprobes.c
kprobes: remove redundant config check
2008-07-25 10:53:30 -07:00
ksysfs.c
kthread.c
tracehook: wait_task_inactive
2008-07-26 12:00:09 -07:00
latencytop.c
lockdep.c
Merge branch 'core/locking' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-07-14 14:55:13 -07:00
lockdep_internals.h
lockdep: add lock_class information to lock_chain and output it
2008-06-24 01:28:20 +02:00
lockdep_proc.c
lockdep: add lock_class information to lock_chain and output it
2008-06-24 01:28:20 +02:00
Makefile
Merge branch 'linus' into core/generic-dma-coherent
2008-07-29 00:07:55 +02:00
marker.c
markers: use rcu_barrier_sched() and call_rcu_sched()
2008-07-25 10:53:45 -07:00
module.c
stop_machine: Wean existing callers off stop_machine_run()
2008-07-28 12:16:31 +10:00
mutex-debug.c
mutex-debug.h
mutex.c
__mutex_lock_common: use signal_pending_state()
2008-06-10 11:45:09 +02:00
mutex.h
notifier.c
ns_cgroup.c
cgroup_clone: use pid of newly created task for new cgroup
2008-07-25 10:53:37 -07:00
nsproxy.c
cgroup_clone: use pid of newly created task for new cgroup
2008-07-25 10:53:37 -07:00
panic.c
Add a WARN() macro; this is WARN_ON() + printk arguments
2008-07-25 10:53:29 -07:00
params.c
pid.c
pidns: remove now unused find_pid function.
2008-07-25 10:53:45 -07:00
pid_namespace.c
bsdacct: switch from global bsd_acct_struct instance to per-pidns one
2008-07-25 10:53:47 -07:00
pm_qos_params.c
pm_qos_params: BKL pushdown
2008-07-02 15:06:24 -06:00
posix-cpu-timers.c
posix-timers: print RT watchdog message
2008-05-24 18:49:22 +02:00
posix-timers.c
posix timers: release_posix_timer: kill the bogus put_task_struct(->it_process);
2008-07-25 10:53:38 -07:00
printk.c
printk ratelimiting rewrite
2008-07-25 10:53:29 -07:00
profile.c
build kernel/profile.o only when requested
2008-07-25 10:53:27 -07:00
ptrace.c
tracehook: wait_task_inactive
2008-07-26 12:00:09 -07:00
rcuclassic.c
stop_machine: Wean existing callers off stop_machine_run()
2008-07-28 12:16:31 +10:00
rcupdate.c
Merge branch 'generic-ipi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-07-15 14:12:03 -07:00
rcupreempt.c
Merge branch 'linus' into cpus4096
2008-07-16 00:29:07 +02:00
rcupreempt_trace.c
rcutorture.c
rcu: make rcutorture even more vicious: invoke RCU readers from irq handlers (timers)
2008-06-26 09:24:33 +02:00
relay.c
relay: add buffer-only channels; useful for early logging
2008-07-26 12:00:04 -07:00
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
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c
sysdev: Pass the attribute to the low level sysdev show/store function
2008-07-21 21:55:02 -07:00
rtmutex.c
rtmutex.h
rtmutex_common.h
rwsem.c
sched.c
sched: test runtime rather than period in global_rt_runtime()
2008-07-28 15:57:24 +02:00
sched_clock.c
sched clock: revert various sched_clock() changes
2008-07-31 17:20:29 +02:00
sched_cpupri.c
sched: use a 2-d bitmap for searching lowest-pri CPU
2008-06-06 15:19:28 +02:00
sched_cpupri.h
sched: fix the cpuprio count really
2008-06-06 15:19:44 +02:00
sched_debug.c
sched: add full schedstats to /proc/sched_debug
2008-06-27 14:31:31 +02:00
sched_fair.c
sched: fix warning in hrtick_start_fair()
2008-07-28 12:01:58 +02:00
sched_features.h
sched: bias effective_load() error towards failing wake_affine().
2008-06-27 14:31:47 +02:00
sched_idletask.c
sched_rt.c
Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-07-24 12:53:51 -07:00
sched_stats.h
sched: fix accounting in task delay accounting & migration
2008-07-04 12:50:23 +02:00
seccomp.c
semaphore.c
mmiotrace broken in linux-next (8-bit writes only)
2008-07-01 10:14:06 +02:00
signal.c
tracehook: force signal_pending()
2008-07-26 12:00:09 -07:00
smp.c
Full conversion to early_initcall() interface, remove old interface
2008-07-26 12:00:04 -07:00
softirq.c
Full conversion to early_initcall() interface, remove old interface
2008-07-26 12:00:04 -07:00
softlockup.c
Full conversion to early_initcall() interface, remove old interface
2008-07-26 12:00:04 -07:00
spinlock.c
srcu.c
stacktrace.c
stacktrace: fix modular build, export print_stack_trace and save_stack_trace
2008-06-30 09:20:55 +02:00
stop_machine.c
stop_machine(): stop_machine_run() changed to use cpu mask
2008-07-28 12:16:30 +10:00
sys.c
kexec jump
2008-07-26 12:00:04 -07:00
sys_ni.c
signalfd: fix undefined reference to `compat_sys_signalfd4' when !CONFIG_SIGNALFD
2008-07-25 11:35:41 -07:00
sysctl.c
lost sysctl fix
2008-07-27 09:45:34 -07:00
sysctl_check.c
sysctl: check for bogus modes
2008-07-25 10:53:45 -07:00
taskstats.c
taskstats: remove initialization of static per-cpu variable
2008-07-25 10:53:47 -07:00
test_kprobes.c
time.c
timeconst.pl
timer.c
Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
2008-07-14 16:06:58 -07:00
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.c
user_namespace.c
utsname.c
utsname_sysctl.c
wait.c
workqueue.c
workqueues: do CPU_UP_CANCELED if CPU_UP_PREPARE fails
2008-07-25 10:53:41 -07:00