locking against myself in getcacheblk()?

[YONETANI Tomokazu <qhwt.dfly@xxxxxxxxxx>]

Hi.
I managed to trigger this panic while trying to find out how to
reliably reproduce another panic (lockmgr: non-zero exclusive count).
Just issue the following command on a machine running recent -DEVELOPMENT
(either on i386 or x86_64):

$ grep -r --mmap SomeString /usr/pkgsrc

If this won't trigger the panic but you need kern/vmcore, please let me
know and I can upload mine to my leaf account.

Best Regards,
YONETANI Tomokazu.