Re: [RFC][Patch] Adding kmsg_dump() toreboot/halt/poweroff/emergency_restart path

[Andrew Morton]

On Mon, 18 Oct 2010 18:24:11 -0400
Seiji Aguchi <seiji.aguchi@xxxxxxx> wrote:

> Hi,
> 
> Final messages from reboot, halt and poweroff aren't output to disk because klogd/syslogd 
> has been killed and root file system has been turned read-only.
> 
> Final messages from emergency_restart aren't output to disk as well because system may
> reboot before klogd/syslogd outputs messages to disk.
> 
> Therefore, it is better to put kmsg_dumper in reboot/halt/poweroff/emergency_restart path.
> Any comments/advices are welcome.
> 

I don't get it.

What actual problem are we solving here?  Why is the current code
inadequate?  It would help to demonstrate some use-case and to explain
how the situation improved with this patch.

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