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Date: Thu, 8 Oct 1998 23:03:54 -0400 (EDT)
From: Brian Cully <shmit@rcn.com>
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To: FreeBSD-gnats-submit@FreeBSD.ORG
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Subject: kern/8221: Panic in tulip driver.
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>Number:         8221
>Category:       kern
>Synopsis:       Panic in tulip driver.
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:
>Keywords:
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Oct  8 20:10:00 PDT 1998
>Last-Modified:
>Originator:     Brian Cully
>Organization:
>Release:        FreeBSD 3.0-BETA i386
>Environment:

FreeBSD natasya.noc.erols.net 3.0-BETA FreeBSD 3.0-BETA #0: Tue Oct  6 17:28:47 EDT 1998     shmit@natasya.noc.erols.net:/usr/src/sys/compile/NATASYA  i386

>Description:

Under heavy network load the tulip driver panics like so:

Fatal trap 12: page fault while in kernel mode
fault virtual address	= 0xefc00000
fault code		= supervisor read, page not present
instruction pointer	= 0x8:0xf01b6e69
stack pointer		= 0x10:0xf4aefd9c
frame pointer		= 0x10:0xf4aefdd0
code segment		= base 0x0, limit 0xffff, type 0x1b
			= DPL0, pres 1, def32 1, gran 1
processor eflags	= interrupt enabled, resum, IOPL = 0
current process		= 260 (cvsup)
interrupt mask		= net
kernel: type 12 trap code = 0
Stopped at	_tulip_txput+0x111:	movl _PTmap(,%eax,4),%edx
db> trace
_tulip_txput [blah blah]
_tulip_ifstart_one
_ether_output
_ip_output
_tcp_output
_tcp_input
_ipintr
swi_net_next()

I don't know how useful this dump is, but it's been the cause of a lot
of panics on my machine, and has been for the last couple of months.

>How-To-Repeat:

>Fix:
	I wish I could do that.
>Audit-Trail:
>Unformatted:

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