Date: Tue, 13 May 2003 12:12:40 -0400 (EDT) From: Robert Watson <rwatson@FreeBSD.org> To: Dag-Erling Smorgrav <des@ofug.org> Cc: current@FreeBSD.org Subject: Re: 5.1-RELEASE TODO Message-ID: <Pine.NEB.3.96L.1030513121117.72145H-100000@fledge.watson.org> In-Reply-To: <xzpof26vnds.fsf@flood.ping.uio.no>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, 13 May 2003, Dag-Erling Smorgrav wrote:
> Robert Watson <rwatson@FreeBSD.org> writes:
> > |-----------------+-------------+-------------+--------------------------|
> > | Panic on | | | If a network device |
> > | load/unload a | | | driver, possibly any |
> > | kernel module | | | driver, is linked into |
> > | for a driver | Patch | Maxime | the kernel and then |
> > | already | submitted | Henrion | loaded and unloaded as a |
> > | statically | | | module, the kernel will |
> > | linked into the | | | panic. This has been |
> > | kernel. | | | observed with both if_dc |
> > | | | | and if_fxp. |
> > |-----------------+-------------+-------------+--------------------------|
>
> I'm unable to reproduce this; kldload refuses to load a module which is
> already present, and if you try to preload a driver which is compiled
> into the kernel, the kernel will refuse to register it.
>
> There have been problems with unloading network drivers (due to
> interrupts being delivered to a handler which had disappeared into thin
> air) but these had nothing to do with whether the driver was already
> compiled-in, and I believe they were fixed about a month ago.
The case I was bumping into was: link the driver into the kernel at
compile-time, then load the kld at runtime, then unload the kld. I
believe mux has patches in hand that were submitted, and just needs to
review, test, and merge :-).
crash2# kldload if_fxp
module_register: module pci/fxp already exists!
Module pci/fxp failed to register: 17
module_register: module cardbus/fxp already exists!
Module cardbus/fxp failed to register: 17
module_register: module fxp/miibus already exists!
Module fxp/miibus failed to register: 17
can't re-use a leaf (fxp_rnr)!
can't re-use a leaf (fxp_noflow)!
crash2# kldunload if_fxp
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x4
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc03131f3
stack pointer = 0x10:0xc91e5c70
frame pointer = 0x10:0xc91e5c70
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 = 661 (kldunload)
kernel: type 12 trap, code=0
Stopped at sysctl_unregister_oid+0x23: cmpl %ecx,0x4(%edx)
db>
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.NEB.3.96L.1030513121117.72145H-100000>