|Summary:||reboot man page missing kexec interaction info|
|Product:||[Fedora] Fedora||Reporter:||Tom Horsley <horsley1953>|
|Component:||sysvinit||Assignee:||Bill Nottingham <notting>|
|Status:||CLOSED WONTFIX||QA Contact:||Fedora Extras Quality Assurance <extras-qa>|
|Fixed In Version:||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2008-12-08 20:27:18 UTC||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
Description Tom Horsley 2008-07-23 13:53:50 UTC
Description of problem: The reboot man page is missing any reference to kexec. (And the kexec man page is missing any reference to reboot), yet kexec and reboot apparently do interact in highly beneficial ways it would be really good to have documented somewhere. Vague hints in google searches and experimentation eventually led to the discovery that the sequence: kexec -l .... reboot is the best way to cleanly shutdown a system and boot up a different (or the same) kernel from scratch without going all the way through the BIOS boot sequence. Since this is radically different behavior than the normal reboot action, it seems like it ought to be documented in the reboot man page. Once the reboot man page is updated, it wouldn't hurt anything to add a see also in the kexec man page pointing to reboot. Version-Release number of selected component (if applicable): sysvinit-2.86-18.x86_64 is the package that owns the reboot man page, so that's what led me to this bug category.
Comment 1 Bill Nottingham 2008-07-23 14:07:00 UTC
Using kexec 1) requires a relocatable kernel 2) requires the kexec tools 3) requires that you have hardware that inits correctly from a warm boot Ergo, I'm not sure that having it as the default mechanism is good.
Comment 2 Tom Horsley 2008-07-23 14:28:32 UTC
I didn't say anything about making it the default for reboot, I just said that it would be nice if the way kexec and reboot already do interact was actually documented somewhere :-).
Comment 3 Bug Zapper 2008-11-26 11:02:12 UTC
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Comment 4 Bill Nottingham 2008-12-08 20:27:18 UTC
Thinking about this again (sorry about the delay) I don't think the reboot man page is the best place for this - this is probably better handled in a HOWTO or similar; especially since we don't recommend kexec for the normal reboot case.