Re: [Fastboot] [PATCH] Reserving backup region for kexec based crashdumps.

[Eric W. Biederman]

Koichi Suzuki <koichi@xxxxxxxxxxxxxxxxx> writes:

> Hook in panic code is very good idea and is useful in various scenes. It could
> be used to kick RAM dump code, obviously, and also kick the code to initiate
> failover, etc.   Various use could be possible so I believe that this hook
> should be prepared for wider use.

It is.  Basically it is the normal kexec interface that allows you to
boot another kernel.  With a few restrictions that should keep it as
reliable as possible when the kernel has not shut itself down cleanly.

The hardest case is to do a useful system core dump.  As that requires
looking at what has gone before.  For the rest if you can do it
with a kernel and a initramfs you are in good shape.

There seems to be a significant amount of interest in the full
system core dump case so that is what the work is concentrating
on.

Eric
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