Things to consider when going 64-bit

A few days ago I decided to bump the kernel on the server from 2.6.20.7 to 2.6.21.5. While recompiling I decided to remove the support from 32-bit executables from the kernel and see what is going to break. Here is the short list:

  • GRUB no longer worked. Apparently it is a 32-bit executable.

  • memtest86+ cannot be compiled

  • I can no longer chroot to my 32-bit rescue root that I only use to boot an old laptop over the network.



Most of the stuff still works, GRUB is already installed in the boot sector, memtest86+ is only used at boot time (i.e. never, except when netbooting other machines), and the chroot -- I can live without upgrading it for now.

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