Messages in this thread | | | Date | Thu, 19 Feb 2004 20:25:43 -0000 (WET) | Subject | Re: Hot kernel change | From | "Carlos Silva" <> |
| |
> On Thu, Feb 19, 2004 at 09:05:25AM -0500, Richard B. Johnson wrote: >>On Thu, 19 Feb 2004, Carlos Silva 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? :) >>> >>> Greetings, >>> >>> Carlos "r3pek" Silva >> >>Sure it's possible. However, you can't change to a new kernel this >>way because the addresses of the hardware devices like the PCI bus >>devices may change with a new kernel. Since the displacements of >>the kernel's internal workings will change with a new version, there >>would need to be considerable work done in re-designing the kernel >>so that it wouldn't matter. >> >>The best you can do, right now, is reload the same kernel. It >>will take about as much time as a reboot, so why bother? Oh, you >>intend to keep the same processes running, do you? You expect to >>be writing a letter in X-windows and hit the reset switch, magically >>returning to the same state after the machine has a new kernel >>installed? Well, well-written software is indistinguishable from >>magic, but first you need to find out how to make time run back- >>wards because, at the very least, the new kernel will be installed >>in the future which means many things will have changed (like >>network IP addresses, dynamic routes, remote file discriptors, etc.) >>Sounds like a neat project for a College Student who wants to >>learn to solve problems they haven't even dreamed of yet. >> > > > What you could do, is use MkLinux, (is that still around?) It had the > ability to run simultaneous kernels, IIRC, then you might be able to > gradually push over new processess to the new kernel, and eventually, > kill the old one. It's been quite a while since I used MkLinux, on PPC > for what it matters, and I could be remembering wrong... >
well, that's what i had in mind... if this could be possible under x86 would be great. i say x86 'cause for what a read, MkLinux looks like a MacLinux Distribution, correct me if i am wrong. like i said in the first place, i don't program for the kernel (yet, i intend to), so i don't know what are the big/small changes that have to be made for somthing like this to work. but i would really like to see this working :D - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |