During early boot you can get kexec to load it as a panic kernel, but by then its too late I would have though. 2009/9/25 Aaron Griffin <aaronmgriffin@xxxxxxxxx>: > On Fri, Sep 25, 2009 at 11:31 AM, David C. Rankin > <drankinatty@xxxxxxxxxxxxxxxxxx> wrote: >> Guys, >> >> I'm curious. Since there is now an LTS kernel, has anyone thought about adding >> a few lines of code to the Arch boot process that would provide for automatic >> failover to the LTS kernel in the event the normal kernel failed to load >> during the boot process. The thought is to provide redundancy for servers in >> the case where the regular kernel becomes corrupt (for whatever reason, disk >> problem, etc...) and a reboot is forced (exhausted UPS, etc..) >> >> I don't know what it would take or if it is doable. I had just envisioned >> adding a trap that catches the failure of the regular kernel to boot, checks >> for the presence of the LTS kernel, and if installed boots the LTS kernel in >> this case. >> >> I haven't looked deep enough into the Arch boot process to know if it is >> feasible, but it just seemed like a good bit of extra protection that Arch >> could provide for server installs where the server operates on the regular >> kernel but also has LTS installed as a backup. >> >> I'll leave it to the gurus to consider. If it's not doable or not worth doing, >> then just consider it another of my stray thoughts worthy of the DEL key ;-) > > You can't do something like this beyond the bootloader. Once anything > has started at boot, you have chosen a kernel and cannot go back. > > I think, however, grub has something to do this >
