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
