[Crash-utility] crashdc: Memory issues when running in kexec context on SLES11

Louis Bouchard louis.bouchard at hp.com
Wed Oct 7 13:16:03 UTC 2009


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Hello (again),

I have been able to get <insert your favorite name here> to run on
RHEL5, SLES10 and SLES11.

RHEL5 runs without any modification to the standard install.
SLES10 requires the crashkernel parameter to be increased from 64M to
128M so crash can run correctly.

My concern is with SLES11 which requires a non trivial modification of
the crashkernel parameter to correctly run.

When I use the standard crashkernel parameter, we've seen that crash
simply doesn't run. When I increase the reserved memory to 256M as
indicated by Bernhard, it runs but I get errors on pipe and some of the
commands do not complete.

When I use crashkernel=256M-:256M at 16M everything works fine and I have
no problem with the pipes.

I got a "cat /proc/meminfo" executed right after execution of the script
on both RHEL and SLES11, but I do not see any evidence of memory limitation.

I have /proc/meminfo for all 3 runs if someone wants to have a look.

I feel that requiring 256M for crashkernel is a bit large, but I may be
wrong. What also puzzles me is the difference b/w SLES10 & SLES11.

TIA,

Kind Regards,
- --
Louis Bouchard, Linux Support Engineer
Team lead, EMEA Linux Competency Center,
Linux Ambassador, HP

HP Services                       1 Ave du Canada
HP France                         Z.A. de Courtaboeuf
louis.bouchard at hp.com             91 947 Les Ulis
http://www.hp.com/go/linux        France
http://www.hp.com/fr
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