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    SubjectRe: [RFC][PATCHv6 00/12] printk: introduce printing kernel thread
    On (12/28/17 15:48), Sergey Senozhatsky wrote:
    [..]
    > and I'm actually thinking about returning back the old vprintk_emit()
    > behavior
    >
    > vprintk_emit()
    > {
    > + preempt_disable();
    > if (console_trylock())
    > console_unlock();
    > + preempt_enable();
    > }

    but am not going to.
    it's outside of printk_kthread scope. and, besides, not every CPU which
    is looping on console_unlock() came there via printk(). so by disabling
    preemption in console_unlock() we cover more cases.

    -ss

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