Re: Hot kernel change

Carlos Silva
2004-02-19T21:33:02Z

> On Thu, 19 Feb 2004 13:33:43 -0000 (WET) "Carlos Silva"
> <r3pek@r3pek.homelinux.org> wrote:
>
> | hi,
> |
> | i would like to know if isn't it possible to implement a hot kernel
> | change, i mean, without reboot. i would do it myself if i had the
> knoledge
> | to do it but i'm starting with kernel-level programing now. i think it
> | would be possible if we make something like M$'s OS do when it
> hibernates,
> | copy all the memory, registers, etc to the disc and then put all back
> | again.
> |
> | am i dreaming or this is possible? :)
>
> The kexec patch is basically "linux reboots linux".
> It bypasses the firmware/BIOS to do the reboot.
>
> Patches for 2.6.0 and 2.6.1 are here (I haven't updated for
> 2.6.2 or 2.6.3 yet):
> http://developer.osdl.org/rddunlap/kexec/
>
> Patches for some 2.5.x kernels are here:
> http://www.xmission.com/~ebiederm/files/kexec/
>
> kexec does reduce reboot time quite a bit on some machines, but
> there is still a noticeable pause.
>

well, what can i say? this is nice, really nice :) but still reboots the
machine... :D
but it's a thing that i will test when a patch for the 2.6.3 kernel gets out.