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Date:      Wed, 2 Oct 2002 15:40:16 -0700 (PDT)
From:      Anshuman Kanwar <akanwar@engineering.ucsb.edu>
To:        <freebsd-questions@freebsd.org>
Subject:   device polling unstable
Message-ID:  <Pine.LNX.4.33.0210021536430.19417-100000@ecipc056.engr.ucsb.edu>

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Hi all,
I enabled device polling on a 4.6 box handling very high bandwidth and it
crashed with the following messages.

Has this been seen before?

Thx.
-ansh


--Console output at kernel panic--

Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0xa0205800
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc013211c
stack pointer           = 0x10:0xc02820f0
frame pointer           = 0x10:0xc0282100
code segment            = base 0x0, limit 0xfffff, type 0x1b
                         = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = Idle
interrupt mask          = net
trap number             = 12
panic: page fault

syncing disks...

Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x30
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc01f9318
stack pointer           = 0x10:0xc0281f14
frame pointer           = 0x10:0xc0281f1c
code segment            = base 0x0, limit 0xfffff, type 0x1b
                         = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = Idle
interrupt mask          = net bio cpoll stalled [1] in phase 2
am
trap number             = 12
panic: page fault
Uptime: 16h32m22s


-- uname -a--
rack1-3# uname  -a
FreeBSD rack1-3.snv 4.6.2-RELEASE-p2 FreeBSD 4.6.2-RELEASE-p2 #0: Tue Oct
1 14:08:22 PDT 2002     root@rack1-3.snv:/usr/src/sys/compile/EC-RACK-02
i386


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