Thread (12 messages) 12 messages, 2 authors, 2012-02-15

Re: [RFC PATCH v6 00/10] fadump: Firmware-assisted dump support for Powerpc.

From: Paul Mackerras <hidden>
Date: 2012-02-15 04:22:27
Also in: kexec, lkml

On Sat, Dec 10, 2011 at 12:19:59PM +0530, Mahesh J Salgaonkar wrote:
The most of the code implementation has been adapted from phyp assisted dump
implementation written by Linas Vepstas and Manish Ahuja.
When you repost the series, please be explicit about what the
relationship between the new fadump facility and the old phyp-dump
is, both in the documentation you're adding and in the patch
descriptions.

I gather that fadump uses the same firmware interfaces as phyp-dump,
and can be characterised as a rewrite of phyp-dump.  It would be good
if you would explicitly mention:

- What advantages fadump has over phyp-dump
- Whether there are any capabilities that phyp-dump does that fadump
  doesn't
- What is different between fadump and phyp-dump in the interface to
  usermode code
- Any user-visible differences between how fadump operates compared to
  phyp-dump.  For example, will users see a difference in how much
  memory is available to the kernel?

Paul.
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