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    nohz: Restart nohz full tick from irq exit · 73738a95
    Frederic Weisbecker 提交于
    Restart the tick when necessary from the irq exit path. It makes nohz
    full more flexible, simplify the related IPIs and doesn't bring
    significant overhead on irq exit.
    
    In a longer term view, it will allow us to piggyback the nohz kick
    on the scheduler IPI in the future instead of sending a dedicated IPI
    that often doubles the scheduler IPI on task wakeup. This will require
    more changes though including careful review of resched_curr() callers
    to include nohz full needs.
    Reviewed-by: NRik van Riel <riel@redhat.com>
    Cc: Christoph Lameter <cl@linux.com>
    Cc: Ingo Molnar <mingo@kernel.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
    Cc: Rik van Riel <riel@redhat.com>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Viresh Kumar <viresh.kumar@linaro.org>
    Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
    73738a95
tick-sched.c 28.8 KB