Steven Rostedt f7cce27f56 sched_clock: widen the max and min time ...

With keeping the max and min sched time within one jiffy of the gtod clock
was too tight. Just before a schedule tick the max could easily be hit, as
well as just after a schedule_tick the min could be hit. This caused the
clock to jump around by a jiffy.

This patch widens the minimum to
   last gtod + (delta_jiffies ? delta_jiffies - 1 : 0) * TICK_NSECS

and the maximum to
    last gtod + (2 + delta_jiffies) * TICK_NSECS

This keeps the minum to gtod or if one jiffy less than delta jiffies
and the maxim 2 jiffies ahead of gtod. This may cause unstable TSCs to be
a bit more sporadic, but it helps keep a clock with a stable TSC working well.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Cc: Steven Rostedt <srostedt@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2008-07-11 15:53:25 +02:00

..

irq

genirq: reenable a nobody cared disabled irq when a new driver arrives

2008-05-02 13:40:34 +02:00

power

Merge branches 'release', 'acpica', 'bugzilla-10224', 'bugzilla-9772', 'bugzilla-9916', 'ec', 'eeepc', 'idle', 'misc', 'pm-legacy', 'sysfs-links-2.6.26', 'thermal', 'thinkpad' and 'video' into release

2008-04-30 13:58:00 -04:00

time

clocksource: allow read access to available/current_clocksource

2008-05-03 18:11:48 +02:00

.gitignore

Update kernel/.gitignore with new auto-generated files

2008-02-09 23:27:01 -08:00

acct.c

bsd_acct: using task_struct->tgid is not right in pid-namespaces

2008-03-24 19:22:20 -07:00

audit_tree.c

[PATCH] list_for_each_rcu must die: audit

2008-05-17 03:30:23 -04:00

audit.c

[PATCH] remove useless argument type in audit_filter_user()

2008-06-24 23:36:35 -04:00

audit.h

[PATCH 1/2] audit: move extern declarations to audit.h

2008-04-28 06:28:04 -04:00

auditfilter.c

[PATCH] remove useless argument type in audit_filter_user()

2008-06-24 23:36:35 -04:00

auditsc.c

[PATCH] new predicate - AUDIT_FILETYPE

2008-04-28 06:28:37 -04:00

backtracetest.c

x86: add a simple backtrace test module

2008-01-30 13:33:08 +01:00

bounds.c

Add kbuild.h that contains common definitions for kbuild users

2008-04-29 08:06:29 -07:00

capability.c

security: filesystem capabilities: fix fragile setuid fixup code

2008-07-04 10:40:08 -07:00

cgroup_debug.c

CGroup API files: move "releasable" to cgroup_debug subsystem

2008-04-29 08:06:09 -07:00

cgroup.c

cgroups: remove node_ prefix_from ns subsystem

2008-05-24 09:56:14 -07:00

compat.c

ntp: support for TAI

2008-05-01 08:03:59 -07:00

configs.c

kernel: use non-racy method for proc entries creation

2008-04-29 08:06:22 -07:00

cpu.c

kernel: replace remaining __FUNCTION__ occurrences

2008-04-30 08:29:54 -07:00

cpuset.c

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

2008-06-20 12:37:13 -07:00

delayacct.c

Add scaled time to taskstats based process accounting

2007-10-18 14:37:28 -07:00

dma.c

kernel: use non-racy method for proc entries creation

2008-04-29 08:06:22 -07:00

exec_domain.c

whitespace fixes: execution domains

2007-10-18 14:37:26 -07:00

exit.c

signals: fix sigqueue_free() vs __exit_signal() race

2008-05-24 09:56:10 -07:00

extable.c

module: Don't report discarded init pages as kernel text.

2008-01-29 17:13:18 +11:00

fork.c

[PATCH] dup_fd() fixes, part 1

2008-05-16 17:22:26 -04:00

futex_compat.c

futex_compat __user annotation

2008-03-30 14:18:41 -07:00

futex.c

futexes: fix fault handling in futex_lock_pi

2008-06-23 13:31:15 +02:00

hrtimer.c

hrtimer: prevent migration for raising softirq

2008-07-03 11:36:48 -07:00

itimer.c

ITIMER_REAL: convert to use struct pid

2008-02-08 09:22:29 -08:00

kallsyms.c

kernel: use non-racy method for proc entries creation

2008-04-29 08:06:22 -07:00

Kconfig.hz

sched: high-res preemption tick

2008-01-25 21:08:29 +01:00

Kconfig.preempt

rcu: move PREEMPT_RCU config option back under PREEMPT

2008-03-10 18:01:20 -07:00

kexec.c

kexec: make extended crashkernel= syntax less confusing

2008-05-01 08:04:00 -07:00

kfifo.c

is_power_of_2: kernel/kfifo.c

2007-07-16 09:05:50 -07:00

kgdb.c

kgdb: sparse fix

2008-06-24 10:52:55 -05:00

kmod.c

[PATCH] split linux/file.h

2008-05-01 13:08:16 -04:00

kprobes.c

kernel/kprobes.c: Made kprobe_blacklist static.

2008-07-10 10:13:51 -07:00

ksysfs.c

Kobject: convert remaining kobject_unregister() to kobject_put()

2008-01-24 20:40:40 -08:00

kthread.c

Deprecate find_task_by_pid()

2008-04-30 08:29:48 -07:00

latencytop.c

kernel: use non-racy method for proc entries creation

2008-04-29 08:06:22 -07:00

lockdep_internals.h

[PATCH] lockdep: more chains

2006-12-07 08:39:43 -08:00

lockdep_proc.c

kernel: use non-racy method for proc entries creation

2008-04-29 08:06:22 -07:00

lockdep.c

Subject: lockdep: include all lock classes in all_lock_classes

2008-02-25 23:03:02 +01:00

Makefile

sched: add optional support for CONFIG_HAVE_UNSTABLE_SCHED_CLOCK

2008-05-05 23:56:18 +02:00

marker.c

make marker_debug static

2008-04-30 08:29:49 -07:00

module.c

modules: proper cleanup of kobject without CONFIG_SYSFS

2008-05-23 13:09:33 +10:00

mutex-debug.c

kernel: remove fastcall in kernel/*

2008-02-08 09:22:31 -08:00

mutex-debug.h

[PATCH] lockdep: better lock debugging

2006-07-03 15:27:01 -07:00

mutex.c

kernel: remove fastcall in kernel/*

2008-02-08 09:22:31 -08:00

mutex.h

[PATCH] lockdep: prove mutex locking correctness

2006-07-03 15:27:04 -07:00

notifier.c

ipc: re-enable msgmni automatic recomputing msgmni if set to negative

2008-04-29 08:06:13 -07:00

ns_cgroup.c

cgroups: kernel/ns_cgroup.c should #include <linux/nsproxy.h>

2008-04-29 08:06:07 -07:00

nsproxy.c

ipc: sysvsem: refuse clone(CLONE_SYSVSEM|CLONE_NEWIPC)

2008-04-29 08:06:14 -07:00

panic.c

Taint kernel after WARN_ON(condition)

2008-04-29 08:05:59 -07:00

params.c

Add new string functions strict_strto* and convert kernel params to use them

2008-02-08 09:22:41 -08:00

pid_namespace.c

pidns: make pid->level and pid_ns->level unsigned

2008-04-30 08:29:49 -07:00

pid.c

pids: introduce change_pid() helper

2008-04-30 08:29:48 -07:00

pm_qos_params.c

pm qos infrastructure and interface

2008-02-05 09:44:22 -08:00

posix-cpu-timers.c

remove div_long_long_rem

2008-05-01 08:03:58 -07:00

posix-timers.c

signals: join send_sigqueue() with send_group_sigqueue()

2008-04-30 08:29:36 -07:00

printk.c

kernel/printk.c: Made printk_recursion_bug_msg static.

2008-07-08 18:10:34 -07:00

profile.c

kernel: use non-racy method for proc entries creation

2008-04-29 08:06:22 -07:00

ptrace.c

make generic sys_ptrace unconditional

2008-05-01 10:21:54 -07:00

rcuclassic.c

rcu: fix hotplug vs rcu race

2008-07-01 09:27:17 +02:00

rcupdate.c

rcupdate: fix comment

2008-02-13 16:21:18 -08:00

rcupreempt_trace.c

Preempt-RCU: implementation

2008-01-25 21:08:24 +01:00

rcupreempt.c

Fix PREEMPT_RCU without HOTPLUG_CPU

2008-07-10 11:13:44 -07:00

rcutorture.c

kernel: explicitly include required header files under kernel/

2008-04-29 08:06:04 -07:00

relay.c

splice: fix sendfile() issue with relay

2008-05-28 14:49:27 +02:00

res_counter.c

memcgroup: add the max_usage member on the res_counter

2008-04-29 08:06:10 -07:00

resource.c

kernel: use non-racy method for proc entries creation

2008-04-29 08:06:22 -07:00

rtmutex_common.h

Don't operate with pid_t in rtmutex tester

2008-02-08 09:22:41 -08:00

rtmutex-debug.c

Don't operate with pid_t in rtmutex tester

2008-02-08 09:22:41 -08:00

rtmutex-debug.h

[PATCH] lockdep: better lock debugging

2006-07-03 15:27:01 -07:00

rtmutex-tester.c

Driver core: change sysdev classes to use dynamic kobject names

2008-01-24 20:40:40 -08:00

rtmutex.c

hrtimer: more hrtimer_init_sleeper() fallout.

2008-02-13 15:45:36 +01:00

rtmutex.h

[PATCH] lockdep: better lock debugging

2006-07-03 15:27:01 -07:00

rwsem.c

sched: mark rwsem functions as __sched for wchan/profiling

2007-12-18 15:21:13 +01:00

sched_clock.c

sched_clock: widen the max and min time

2008-07-11 15:53:25 +02:00

sched_debug.c

revert ("sched: fair-group: SMP-nice for group scheduling")

2008-05-29 11:28:57 +02:00

sched_fair.c

sched: stop wake_affine from causing serious imbalance

2008-05-29 11:29:20 +02:00

sched_features.h

sched: /debug/sched_features

2008-04-19 19:45:00 +02:00

sched_idletask.c

sched: make rt_sched_class, idle_sched_class static

2008-05-05 23:56:17 +02:00

sched_rt.c

sched: rt: dont stop the period timer when there are tasks wanting to run

2008-06-20 11:00:19 +02:00

sched_stats.h

sched, delay accounting: fix incorrect delay time when constantly waiting on runqueue

2008-06-19 14:15:28 +02:00

sched.c

sched: fix divide error when trying to configure rt_period to zero

2008-07-01 08:23:24 +02:00

seccomp.c

make seccomp zerocost in schedule

2007-07-16 09:05:50 -07:00

semaphore.c

Revert "semaphore: fix"

2008-05-10 20:43:22 -07:00

signal.c

posix timers: discard SI_TIMER signals on exec

2008-05-26 10:37:07 -07:00

softirq.c

Fix cpu hotplug problem in softirq code

2008-05-01 08:03:58 -07:00

softlockup.c

softlockup: print a module list on being stuck

2008-07-05 08:51:24 +02:00

spinlock.c

spinlock: lockbreak cleanup

2008-01-30 13:31:20 +01:00

srcu.c

make srcu_readers_active() static

2008-02-06 10:41:02 -08:00

stacktrace.c

[PATCH] lockdep: stacktrace subsystem, core

2006-07-03 15:27:02 -07:00

stop_machine.c

stop_machine: make stop_machine_run more virtualization friendly

2008-05-23 13:09:34 +10:00

sys_ni.c

timerfd: new timerfd API

2008-02-05 09:44:07 -08:00

sys.c

sys_prctl(): fix return of uninitialized value

2008-05-24 09:56:13 -07:00

sysctl_check.c

constify tables in kernel/sysctl_check.c

2008-02-08 09:22:31 -08:00

sysctl.c

[PATCH] avoid multiplication overflows and signedness issues for max_fds

2008-05-16 17:22:52 -04:00

taskstats.c

Use find_task_by_vpid in taskstats

2008-04-30 08:29:48 -07:00

test_kprobes.c

kprobes: kretprobe user entry-handler

2008-02-06 10:41:11 -08:00

time.c

Make constants in kernel/timeconst.h fixed 64 bits

2008-05-02 16:18:42 -07:00

timeconst.pl

Make constants in kernel/timeconst.h fixed 64 bits

2008-05-02 16:18:42 -07:00

timer.c

debugobjects: add timer specific object debugging code

2008-04-30 08:29:53 -07:00

tsacct.c

Add scaled time to taskstats based process accounting

2007-10-18 14:37:28 -07:00

uid16.c

asmlinkage_protect replaces prevent_tail_call

2008-04-10 17:28:26 -07:00

user_namespace.c

eCryptfs: make key module subsystem respect namespaces

2008-04-29 08:06:07 -07:00

user.c

alloc_uid: cleanup

2008-04-30 08:29:53 -07:00

utsname_sysctl.c

Isolate the UTS namespace's domainname and hostname back

2007-11-29 09:24:53 -08:00

utsname.c

kernel: explicitly include required header files under kernel/

2008-04-29 08:06:04 -07:00

wait.c

kernel: remove fastcall in kernel/*

2008-02-08 09:22:31 -08:00

workqueue.c

Christoph has moved

2008-07-04 10:40:04 -07:00