Re: [PATCH, RFC] panic-note: Annotation from user space for panics

Eric W. Biederman
2009-11-18T16:07:27Z

Matt Mackall <mpm@selenic.com> writes:

> As much as I like kexec, it loses on memory footprint by about 100x.
> It's not appropriate for all use cases, especially things like
> consumer-grade wireless access points and phones.

In general I agree. The cost of a second kernel and initrd can be
prohibitive in the smallest systems, and if you do a crash capture
with using a standalone app that is reinventing the wheel.

That said. I can happily run kdump with only 16M-20M reserved.
So on many systems the cost is affordable.

Eric