partial dumps (was Re: Change default dumpdir to /usr/crash?)

[Andrew Gallatin]

Andrew Gallatin writes:
 > accept and port to -current the Duke "partial dump" patches. These
 > patches allow the user to optionally dump just the kernel virtual
 > address space.  This results in dumps that are generally less than

Eeek.  I misremembered.

The code actually skips free pages, memory holes, and file-backed (aka
vmio) pages.  So you can end up with a lot more than the kernel map.
But I think it should still be a huge win.

Drew