Re: [PATCH] - Fix get_model_name() for mixed cpu type systems

KAMEZAWA Hiroyuki
2006-10-20T01:54:06Z

On Thu, 19 Oct 2006 15:57:20 -0500 (CDT)
Russ Anderson <rja@sgi.com> wrote:

> Attached is a test patch for supporting mixed CPUs. It changes pmu_conf to
> an array, to keep track of the different CPU characteristics. At initialization
> information is saved for each of the CPUs.
>
> Routines have been modified to access the corresponding CPU information. There
> are likely mistakes accessing the correct CPU, but it is a start.
>
> It boots on a mixed CPU system. I can help test.
>
(maybe off topic ?)

While I was testing cpu-hotplug (2.6.18-git tree), mistakenly I hot-plugged
different-frequency-cpu.
Booted with : Itanium2 1.6GHz
Hot-added : Itanium2 1.5GHz

What happend was ...hrtimer delayed.
timers based on jiffies (ex. select()) worked well but timer based on hrtimer
can't work. For example, sleep(1) sleeps very long..

Mixed-cpu system works well in other environment ?

-Kame