Ubuntu aims for ten-second boot time with 10.04 (ars Technica)
Posted Jun 11, 2009 21:22 UTC (Thu) by larryr
In reply to: Ubuntu aims for ten-second boot time with 10.04 (ars Technica)
Parent article: Ubuntu aims for ten-second boot time with 10.04 (ars Technica)
how does one use this?
Essentially it is the same as doing "reboot" except instead of going back to the BIOS, the running Linux kernel just runs the subsequent instance of the kernel directly, as it would be by GRUB or whatever the bootloader is.
One thing it might be used for is to boot from the BIOS into a minimal Linux OS instance which is essentially a super intelligent bootloader which uses kexec to boot the desired target OS... that way not much intelligence is required of the bootloader which the BIOS calls. But actually using kexec from the Linux shell is pretty mundane and anticlimactic by itself.
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