Hi,
'crash' tool cannot read dmesg/log for dumps from Linux HEAD version:
crash> log
log: WARNING: log buf data structure(s) have changed
The reason is one of the Linux changes in HEAD. This change is in -rc
so not many people see this issue. But it will be released in 3.11.
Here is the change
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id...
I believe crash tool should check 'printk_log' structure and if it is
absent then check for 'log'.