Messages in this thread | | | From | Frederic Weisbecker <> | Subject | [ANNOUNCE] 3.8-rc4-nohz3 | Date | Wed, 23 Jan 2013 01:34:54 +0100 |
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Hi,
This version of the full dynticks patchset integrates the latest full dynticks cputime accounting changes (see https://lkml.org/lkml/2013/1/22/652) and is rebased against 3.8-rc4.
All of these patches have been posted already so I'm not spamming you again.
You can pull from:
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git 3.8-rc4-nohz3
So this fixes and improve a lot of things since 3.8-rc2-nohz2:
- Use sched_clock() instead of jiffies for better precision. And because jiffies granularity was requiring too much dirty hacks to make it working. (Thanks Steven for the suggestion).
- To fully support sched_clock(), use a per nanosec granularity in cputime_t
- Fix a deadlock with tsacct
- Better description of the Kconfig
- Don't scale generic vtime accounting against CFS precise task time accounting. Now that we use sched_clock() we should have precise enough statistics.
- Consolidate some code in the reader side
- Make the reader irqsafe (fix potential deadlock against writers)
- Handle guest cputime
- Handle idle tasks. Those were special because they don't start from schedule() so they need their own initializations.
- Fix build error with CONFIG_IRQ_TIME_ACCOUNTING (thanks Wu Fenguang)
- Depend on 64 bits archs to make kernel_cpustat reading to be atomic
Thanks.
--- Frederic Weisbecker (44): 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 context_tracking: Add comments on interface and internals context_tracking: Export context state for generic vtime cputime: Librarize per nsecs resolution cputime definitions cputime: Move default nsecs_to_cputime() to jiffies based cputime file 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 kvm: Prepare to add generic guest entry/exit callbacks cputime: Safely read cputime of full dynticks CPUs Merge branch 'nohz/printk-v8' 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 | 92 +-------- 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/configs/chroma_defconfig | 2 +- arch/powerpc/configs/corenet64_smp_defconfig | 2 +- arch/powerpc/configs/pasemi_defconfig | 2 +- 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 +- fs/proc/array.c | 4 +- include/asm-generic/cputime.h | 66 +----- include/asm-generic/cputime_jiffies.h | 72 ++++++ include/asm-generic/cputime_nsecs.h | 104 +++++++++ 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/kvm_host.h | 55 ++++- 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 | 50 ++++- include/linux/tick.h | 26 +++- include/linux/tsacct_kern.h | 3 + include/linux/vtime.h | 59 ++++-- init/Kconfig | 28 ++- kernel/acct.c | 6 +- kernel/context_tracking.c | 110 ++++++++--- kernel/cpu.c | 4 +- kernel/delayacct.c | 7 +- kernel/exit.c | 10 +- kernel/fork.c | 6 + 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 | 105 ++++++++- kernel/sched/cputime.c | 298 +++++++++++++++++++++++--- 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 | 44 +++- 89 files changed, 1489 insertions(+), 522 deletions(-)
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