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Re: [patch V2 08/10] timer: Implement the hierarchical pull model

From Peter Zijlstra <peterz@infradead.org>
Newsgroups linux.kernel
Subject Re: [patch V2 08/10] timer: Implement the hierarchical pull model
Date 2017-04-19 09:40 +0200
Message-ID <txSnx-vJ-23@gated-at.bofh.it> (permalink)
References <txEue-8r4-5@gated-at.bofh.it> <txEuf-8r4-41@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Tue, Apr 18, 2017 at 01:11:10PM +0200, Thomas Gleixner wrote:
> +struct tmigr_group {
> +	raw_spinlock_t		lock;
> +	unsigned int		active;
> +	unsigned int		migrator;
> +	struct timerqueue_head	events;
> +	struct tmigr_event	groupevt;
> +	struct tmigr_group	*parent;
> +	cpumask_var_t		cpus;
> +	struct list_head	list;
> +	unsigned int		level;
> +	unsigned int		numa_node;
> +	unsigned int		num_childs;
> +};

If you place the cpumask at the end, as a 0 sized array, you can avoid a
second allocation.

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Thread

[patch V2 00/10] timer: Move from a push remote at enqueue to a pull  at expiry model Thomas Gleixner <tglx@linutronix.de> - 2017-04-18 18:50 +0200
  [patch V2 06/10] timer: Restructure internal locking Thomas Gleixner <tglx@linutronix.de> - 2017-04-18 18:50 +0200
    Re: [patch V2 06/10] timer: Restructure internal locking Peter Zijlstra <peterz@infradead.org> - 2017-04-19 09:10 +0200
  [patch V2 10/10] timer: Always queue timers on the local CPU Thomas Gleixner <tglx@linutronix.de> - 2017-04-18 18:50 +0200
  [patch V2 07/10] tick/sched: Split out jiffies update helper function Thomas Gleixner <tglx@linutronix.de> - 2017-04-18 18:50 +0200
  [patch V2 08/10] timer: Implement the hierarchical pull model Thomas Gleixner <tglx@linutronix.de> - 2017-04-18 18:50 +0200
    Re: [patch V2 08/10] timer: Implement the hierarchical pull model Peter Zijlstra <peterz@infradead.org> - 2017-04-19 09:30 +0200
    Re: [patch V2 08/10] timer: Implement the hierarchical pull model Peter Zijlstra <peterz@infradead.org> - 2017-04-19 09:30 +0200
    Re: [patch V2 08/10] timer: Implement the hierarchical pull model Peter Zijlstra <peterz@infradead.org> - 2017-04-19 09:40 +0200
    Re: [patch V2 08/10] timer: Implement the hierarchical pull model Peter Zijlstra <peterz@infradead.org> - 2017-04-19 09:40 +0200
    Re: [patch V2 08/10] timer: Implement the hierarchical pull model Peter Zijlstra <peterz@infradead.org> - 2017-04-19 10:20 +0200
      Re: [patch V2 08/10] timer: Implement the hierarchical pull model Peter Zijlstra <peterz@infradead.org> - 2017-04-19 10:40 +0200
        Re: [patch V2 08/10] timer: Implement the hierarchical pull model Thomas Gleixner <tglx@linutronix.de> - 2017-04-19 11:10 +0200
      Re: [patch V2 08/10] timer: Implement the hierarchical pull model Thomas Gleixner <tglx@linutronix.de> - 2017-04-19 10:40 +0200
    Re: [patch V2 08/10] timer: Implement the hierarchical pull model Peter Zijlstra <peterz@infradead.org> - 2017-04-19 11:00 +0200
    Re: [patch V2 08/10] timer: Implement the hierarchical pull model Peter Zijlstra <peterz@infradead.org> - 2017-04-19 11:10 +0200
      Re: [patch V2 08/10] timer: Implement the hierarchical pull model Peter Zijlstra <peterz@infradead.org> - 2017-04-19 11:50 +0200
        Re: [patch V2 08/10] timer: Implement the hierarchical pull model Peter Zijlstra <peterz@infradead.org> - 2017-04-19 12:00 +0200
      Re: [patch V2 08/10] timer: Implement the hierarchical pull model Thomas Gleixner <tglx@linutronix.de> - 2017-04-19 11:50 +0200
        Re: [patch V2 08/10] timer: Implement the hierarchical pull model Peter Zijlstra <peterz@infradead.org> - 2017-04-19 12:00 +0200
    Re: [patch V2 08/10] timer: Implement the hierarchical pull model Peter Zijlstra <peterz@infradead.org> - 2017-04-19 11:30 +0200
    Re: [patch V2 08/10] timer: Implement the hierarchical pull model Peter Zijlstra <peterz@infradead.org> - 2017-04-19 12:30 +0200
  [patch V2 05/10] timer: Retrieve next expiry of pinned/non-pinned  timers seperately Thomas Gleixner <tglx@linutronix.de> - 2017-04-18 18:50 +0200
    Re: [patch V2 05/10] timer: Retrieve next expiry of  pinned/non-pinned timers seperately Peter Zijlstra <peterz@infradead.org> - 2017-04-19 09:10 +0200
      Re: [patch V2 05/10] timer: Retrieve next expiry of pinned/non-pinned  timers seperately Thomas Gleixner <tglx@linutronix.de> - 2017-04-19 12:00 +0200
  [patch V2 04/10] timer: Keep the pinned timers separate from the  others Thomas Gleixner <tglx@linutronix.de> - 2017-04-18 18:50 +0200
  Re: [patch V2 00/10] timer: Move from a push remote at enqueue to a  pull at expiry model "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-04-21 21:30 +0200

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