The new pstore is persistent storage for kernel messages. http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=include/linux/pstore.h https://lwn.net/Articles/434821/
*** Bug 13688 has been marked as a duplicate of this bug. ***
As noted in the duped bug #13688, this would probably be most appropriate for a last-gasp sort of output, not routine transport data.