Mailinglist Archive: opensuse-factory (949 mails)

[Dave Plater <dave.plater@xxxxxxxxxxx>]

On 08/18/2009 04:51 AM, Graham Anderson wrote:
> On Tuesday 18 August 2009 04:23:28 Patrick Shanahan wrote:
>   
> > What I wonder is how to make the *new* kernel active w/o rebooting?
> >     
> I'm not sure you can without using something funky like ksplice, and i'm not 
> even sure that's available for other kernels other than Ubuntu at the moment.
>
> The fastest reboot option would be kexec though.
>
> from man:
>
> EXAMPLE
> For example, if the kernel image you want to reboot to is /boot/vmlinux, the 
> contents of /proc/cmdline is root=/dev/hda1, and the  path  to the initrd is 
> /boot/initrd, then you would use the following command to load the kernel:
>
>     kexec -l /boot/vmlinux --append=root=/dev/hda1 --initrd=/boot/initrd
>
> After this kernel is loaded, it can be booted to at any time using the 
> command:
>
>     kexec -e
>
>   
kexec actually bypasses grub as well and can be used from the rescue
system when grub has failed.
Regards
Dave P
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