[Cialug] uptime

[Michael Osten]

On Jul 7, 2006, at 4:16 PM, Daniel A. Ramaley wrote:

> On Friday 07 July 2006 15:23, D. Joe Anderson wrote:
>> Heh.  I thought one needed to reboot, too, but kept my mouth
>> shut on this one for a while because for a time there was a
>> project I saw referred to as "two-kernel monte" that would allow
>> you to start a new kernel from a running one.  That was back in
>> the 2.4 days, at least, maybe earlier, and I hadn't heard much
>> about it since.  I thought it was defunct, but then you never
>> know.  LVM hit a rough patch there for a while, and now it seems
>> to be common enough, for example.
>>
>> Anyway, my expectation is that even with something like that
>> going, the uptime counter would reset anyway.
>
> I remember hearing about that as well. If i remember correctly, it  
> would
> basically load the new kernel into memory, make the new one take over
> operations of the old kernel, then remove the old kernel. Both kernels
> had to have been compiled with the proper extension to make it happen,
> though. And i don't think it could be loaded as a module.
>


Off topic, but Solaris has been able to do this for years (as well as  
hotswap CPU/Memory).
--
Michael Osten