Re: highres timers break cpu hotplug in 2.6.23-rc5 [was Re: cpu hotplug support broken in 2.6.23-rc3]

[Jeff Chua]

On 9/3/07, Pavel Machek <pavel@xxxxxx> wrote:

> It gets weirder. With "nohz=off" on commandline, I have to press any
> key (generate interrupt?) for echo 1  > online to finish. 2.6.23-rc5
> kernel... but hotplug/unplug works reliably now.
>
> With nohz=off highres=off I can unplug/replug cpus as much as I
> want... running in tight loop now.

Yes. CONFIG_NO_HZ and and CONFIG_HIGH_RES_TIMERS has to be unset or
suspend-to-disk would just hang, unless you type something on the
keyboard, and then you can suspend to disk. It seems interrupts are
not missing.

Thanks,
Jeff.
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