[PATCH makedumpfile 0/2] LZO Compression Support

[HATAYAMA Daisuke]

The following series implements LZO compression support to
makedumpfile. LZO is as good as in size but by far better in speed
than ZLIB, readucing down time during generation of crash dump and
refiltering.

The RFC discussion:

  http://lists.infradead.org/pipermail/kexec/2011-November/005783.html
  http://lists.infradead.org/pipermail/kexec/2011-December/005868.html

How to build:

  1. Get lzo libraries: lzo, lzo-devel and lzo-minilzo from either of
  the following:

    1) Original author's website:
       http://www.oberhumer.com/opensource/lzo/

    2) yum framework on fedora. Older releases don't have the packages.

  2. Apply the patch set to makedumpfile v1.4.2.

  3. Do make.

How to use:

  Introduce new -l option. If a user specify this, makedumpfile
  generates dumpfile compressed by pages with lzo compression.

  Example)
  $ makedumpfile -l vmcore dumpfile

Performance evaluation:

  - Kumagai-san's evaluation simulating actually working servers:
    http://lists.infradead.org/pipermail/kexec/2011-December/005868.html

  - My evaluation focusing on the worst cases:
    http://lists.infradead.org/pipermail/kexec/2011-November/005783.html

LZO Support for crash:

  I'll post LZO support patch for crash after makedumpfile merges
  these patches.

---

HATAYAMA Daisuke (2):
      Add help and manual messages about LZO compression support
      Add LZO Support


 Makefile       |    2 +-
 diskdump_mod.h |    3 ++-
 makedumpfile.8 |    6 +++---
 makedumpfile.c |   57 +++++++++++++++++++++++++++++++++++++++++++++++---------
 makedumpfile.h |    2 ++
 print_info.c   |   16 ++++++++--------
 6 files changed, 64 insertions(+), 22 deletions(-)

-- 
HATAYAMA Daisuke