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Date: Tue, 8 Jan 2013 03:08:00 +0100
From: Frederic Weisbecker <fweisbec@...il.com>
To: LKML <linux-kernel@...r.kernel.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>,
Alessio Igor Bogani <abogani@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Chris Metcalf <cmetcalf@...era.com>,
Christoph Lameter <cl@...ux.com>,
Geoff Levand <geoff@...radead.org>,
Gilad Ben Yossef <gilad@...yossef.com>,
Hakan Akkan <hakanakkan@...il.com>,
Ingo Molnar <mingo@...nel.org>,
Li Zhong <zhong@...ux.vnet.ibm.com>,
Namhyung Kim <namhyung.kim@....com>,
"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
Paul Gortmaker <paul.gortmaker@...driver.com>,
Peter Zijlstra <peterz@...radead.org>,
Steven Rostedt <rostedt@...dmis.org>,
Thomas Gleixner <tglx@...utronix.de>
Subject: [ANNOUNCE] 3.8-rc2-nohz2
Hi,
Here is a new version of the full dynticks patchset based on 3.8-rc2.
It addresses most feedbacks I got on the previous release (see the list of changes
below).
Thanks you for your reviews, they are really useful!
This version is pullable at:
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
3.8-rc2-nohz2
For the details on how to use it, check this link:
https://lwn.net/Articles/530345/ on the section "How to use".
Changes since 3.8-rc1-nohz1:
* Let the user choose between CONFIG_VIRT_CPU_ACCOUNTING_NATIVE and
CONFIG_VIRT_CPU_ACCOUNTING_GEN if both are available (thanks Li Zhong).
[patch 03/33]
* Move code that export context tracking state to its own commit to
make the review easier (thanks Paul Gortmaker) [patch 02/33]
* Rename vtime_accounting() to vtime_accounting_enabled() (thanks
Paul Gortmaker) [patch 04/33]
* Fix vtime_enter_user / vtime_user_enter confusion. (thanks Li Zhong)
[patch 03/33]
* Fix grammar, spelling and foggy explanations. (thanks Paul Gortmaker)
[patch 04/33]
* Fix "hook" based naming (thanks Ingo Molnar) [patch 01/33]
* Fix is_nocb_cpu() orphan declaration (thanks Namhyung Kim) [patch 22/33]
* Add full dynticks runqueue clock debugging [patch 29-30/33]
* Fix missing rq clock update in update_cpu_load_nohz(), thanks to the
debugging code on the previous patch. [patch 32/33] That's not yet a full
solution for the nohz rt power scale though.
* Partly handle update_cpu_load_active() [patch 33/33] (we still have to handle
calc_load_account_active)
TODO list has slightly reduced and also slightly grown :)
- Handle calc_load_account_active().
- Handle sched_class->task_tick()
- Handle rt power scaling
- Make sure rcu_nocbs mask matches full_nohz's.
- Get the nohz printk patchset merged.
- Posix cpu timers enqueued while tick is off. Probably no big deal but
I need to look into that.
- Several trivial stuffs: perf_event_task_tick(), profile_tick(),
sched_clock_tick(), etc...
Enjoy!
---
Frederic Weisbecker (41):
irq_work: Fix racy IRQ_WORK_BUSY flag setting
irq_work: Fix racy check on work pending flag
irq_work: Remove CONFIG_HAVE_IRQ_WORK
nohz: Add API to check tick state
irq_work: Don't stop the tick with pending works
irq_work: Make self-IPIs optable
printk: Wake up klogd using irq_work
Merge branch 'nohz/printk-v8' into 3.8-rc2-nohz2-base
context_tracking: Add comments on interface and internals
context_tracking: Export context state for generic vtime
cputime: Generic on-demand virtual cputime accounting
cputime: Allow dynamic switch between tick/virtual based cputime accounting
cputime: Use accessors to read task cputime stats
cputime: Safely read cputime of full dynticks CPUs
nohz: Basic full dynticks interface
nohz: Assign timekeeping duty to a non-full-nohz CPU
nohz: Trace timekeeping update
nohz: Wake up full dynticks CPUs when a timer gets enqueued
rcu: Restart the tick on non-responding full dynticks CPUs
sched: Comment on rq->clock correctness in ttwu_do_wakeup() in nohz
sched: Update rq clock on nohz CPU before migrating tasks
sched: Update rq clock on nohz CPU before setting fair group shares
sched: Update rq clock on tickless CPUs before calling check_preempt_curr()
sched: Update rq clock earlier in unthrottle_cfs_rq
sched: Update clock of nohz busiest rq before balancing
sched: Update rq clock before idle balancing
sched: Update nohz rq clock before searching busiest group on load balancing
nohz: Move nohz load balancer selection into idle logic
nohz: Full dynticks mode
nohz: Only stop the tick on RCU nocb CPUs
nohz: Don't turn off the tick if rcu needs it
nohz: Don't stop the tick if posix cpu timers are running
nohz: Add some tracing
rcu: Don't keep the tick for RCU while in userspace
profiling: Remove unused timer hook
timer: Don't run non-pinned timer to full dynticks CPUs
sched: Use an accessor to read rq clock
sched: Debug nohz rq clock
sched: Remove broken check for skip clock update
sched: Update rq clock before rt sched average scale
sched: Disable lb_bias feature for full dynticks
Steven Rostedt (2):
irq_work: Flush work on CPU_DYING
irq_work: Warn if there's still work on cpu_down
arch/alpha/Kconfig | 1 -
arch/alpha/kernel/osf_sys.c | 6 +-
arch/arm/Kconfig | 1 -
arch/arm64/Kconfig | 1 -
arch/blackfin/Kconfig | 1 -
arch/frv/Kconfig | 1 -
arch/hexagon/Kconfig | 1 -
arch/ia64/include/asm/cputime.h | 6 +-
arch/ia64/include/asm/thread_info.h | 4 +-
arch/ia64/include/asm/xen/minstate.h | 2 +-
arch/ia64/kernel/asm-offsets.c | 2 +-
arch/ia64/kernel/entry.S | 16 +-
arch/ia64/kernel/fsys.S | 4 +-
arch/ia64/kernel/head.S | 4 +-
arch/ia64/kernel/ivt.S | 8 +-
arch/ia64/kernel/minstate.h | 2 +-
arch/ia64/kernel/time.c | 4 +-
arch/mips/Kconfig | 1 -
arch/parisc/Kconfig | 1 -
arch/powerpc/Kconfig | 1 -
arch/powerpc/include/asm/cputime.h | 6 +-
arch/powerpc/include/asm/lppaca.h | 2 +-
arch/powerpc/include/asm/ppc_asm.h | 4 +-
arch/powerpc/kernel/entry_64.S | 4 +-
arch/powerpc/kernel/time.c | 4 +-
arch/powerpc/platforms/pseries/dtl.c | 6 +-
arch/powerpc/platforms/pseries/setup.c | 6 +-
arch/s390/Kconfig | 1 -
arch/s390/kernel/vtime.c | 6 +-
arch/sh/Kconfig | 1 -
arch/sparc/Kconfig | 1 -
arch/x86/Kconfig | 1 -
arch/x86/kernel/apm_32.c | 11 +-
drivers/isdn/mISDN/stack.c | 7 +-
drivers/staging/iio/trigger/Kconfig | 1 -
fs/binfmt_elf.c | 8 +-
fs/binfmt_elf_fdpic.c | 7 +-
include/asm-generic/cputime.h | 1 +
include/linux/context_tracking.h | 28 ++++
include/linux/hardirq.h | 4 +-
include/linux/init_task.h | 11 ++
include/linux/irq_work.h | 20 +++
include/linux/kernel_stat.h | 2 +-
include/linux/posix-timers.h | 1 +
include/linux/printk.h | 3 -
include/linux/profile.h | 13 --
include/linux/rcupdate.h | 8 +
include/linux/sched.h | 48 +++++++-
include/linux/tick.h | 26 ++++-
include/linux/vtime.h | 51 +++++---
init/Kconfig | 20 ++-
kernel/acct.c | 6 +-
kernel/context_tracking.c | 91 ++++++++++----
kernel/cpu.c | 4 +-
kernel/delayacct.c | 7 +-
kernel/exit.c | 6 +-
kernel/fork.c | 8 +-
kernel/hrtimer.c | 3 +-
kernel/irq_work.c | 131 ++++++++++++++-----
kernel/posix-cpu-timers.c | 39 +++++-
kernel/printk.c | 36 +++---
kernel/profile.c | 24 ----
kernel/rcutree.c | 19 ++-
kernel/rcutree.h | 1 -
kernel/rcutree_plugin.h | 13 +--
kernel/sched/core.c | 104 ++++++++++++++--
kernel/sched/cputime.c | 222 +++++++++++++++++++++++++++-----
kernel/sched/fair.c | 96 ++++++++++----
kernel/sched/features.h | 3 +
kernel/sched/rt.c | 8 +-
kernel/sched/sched.h | 50 +++++++
kernel/sched/stats.h | 8 +-
kernel/sched/stop_task.c | 8 +-
kernel/signal.c | 12 +-
kernel/softirq.c | 11 +-
kernel/time/Kconfig | 9 ++
kernel/time/tick-broadcast.c | 3 +-
kernel/time/tick-common.c | 5 +-
kernel/time/tick-sched.c | 144 ++++++++++++++++++---
kernel/timer.c | 6 +-
kernel/tsacct.c | 19 ++-
81 files changed, 1117 insertions(+), 358 deletions(-)
--
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