Messages in this thread | | | Date | Thu, 19 Feb 2004 13:08:08 -0800 | From | "Randy.Dunlap" <> | Subject | Re: Hot kernel change |
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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.
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