kdump on a quad core Opteron blade machine doesn't give a complete vmcore on the system. All works well until we attempt to copy /proc/vmcore to some target place ( disk , n/w ). The system immediately resets without any OS messages after having copied few mb's of vmcore file. Problem also occurs with 2.6.27-rc8 and latest kexec-tools. If we pass 'mem=4G' as boot parameter to the first kernel, then kdump succeeds in copying a readable vmcore to /var/crash. [root at abc ~]# uname -a Linux abc 2.6.27-rc8 #2 SMP Tue Oct 7 08:05:46 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux Chandru
