Re: [PATCH v2 2/5] tick/broadcast: Split __tick_broadcast_oneshot_control() into a helper

On Tue, Jun 01 2021 at 13:13, Will Deacon wrote:

On Mon, May 31, 2021 at 04:29:20PM +0200, Thomas Gleixner wrote:

quoted

On Thu, May 27 2021 at 12:56, Will Deacon wrote:

quoted

On Thu, May 27, 2021 at 07:35:03PM +0800, Xin Hao wrote:

quoted

在 2021/5/27 下午4:22, Will Deacon 写道:

quoted

On Thu, May 27, 2021 at 03:23:06PM +0800, Xin Hao wrote:

quoted

      I  had backport you  tick/broadcast: Prefer per-cpu relatives patches,

but i did not get the true result,  the Wakeup Devices are all null, why?

Probably because you don't have any suitable per-cpu timers to act as a
wakeup. Do you have a per-cpu timer registered with CLOCK_EVT_FEAT_PERCPU

Yes, you are right, but i want to know why the timer do not support 
CLOCK_EVT_FEAT_PERCPU.

I defer to Thomas on this one.

How should I know what kind of timers this hardware has?

Duh, sorry, I replied to the wrong question. I meant to defer the decision
about whether to print "<NULL>" if the wakeup timer is absent, or whether to
omit the line entirely.

I went with the former in the patches you queued as it's both consistent
with the rest of the code and probably (?) easier to parse.

That makes more sense. I just kept it as is. The <NULL> is fine.

Thanks,

        tglx

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