[PATCH 0/5] Add second memory region for crash kernel

Vitaly Mayatskikh v.mayatskih at gmail.com
Fri Apr 23 03:08:45 EDT 2010

At Thu, 22 Apr 2010 18:45:25 -0400, Vivek Goyal wrote:

> Vitaly, have you really run into cases where 2G upper limit is a concern.
> What is the configuration you have, how much memory it has and how much
> memory are you planning to reserve for kdump kernel?

I tried it on system with 96G of RAM. When I reserved 512M for kdump
kernel, system stopped loading somewhere in user space. With larger
reserved area /sbin/kexec can't load kernel (because of hardcoded
limitation in /sbin/kexec). After removing this limitation kernel was
loaded below 2G, but system even hasn't booted.

Unfortunately, I don't remember exact details now and have no access
to that machine temporarily. Will try to get access and come back with
wbr, Vitaly

More information about the kexec mailing list