Need information on "panic: mget"

[smb at arpa.att.com]

The networking code uses a pool of buffers called mbufs; mget obtains a
free buffer.  Locking for access to the buffer pool is done by calling
splimp(), which is supposed to be higher than any network device can
interrupt.  I think that some serial boards interrupt at a higher priority
than this, and -- since SLIP runs on serial lines -- you can get into
trouble.  You can either restrap your serial board to a lower priority, or
-- if you're skillful with adb -- you can patch the splimp() code to be a
higher mask.