Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!rice!sun-spots-request
From: smb@arpa.att.com
Newsgroups: comp.sys.sun
Subject: Re: Need information on "panic: mget"
Keywords: SunOS
Message-ID: <8904251609.AA26850@hector.homer.nj.att.com>
Date: 5 May 89 21:34:46 GMT
Sender: usenet@rice.edu
Organization: Sun-Spots
Lines: 8
Approved: Sun-Spots@rice.edu
Original-Date: Tue, 25 Apr 89 12:09:42 EDT
X-Sun-Spots-Digest: Volume 7, Issue 268, message 8 of 21

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.