On Tue, 13 May 2003, Dag-Erling Smorgrav wrote: > Robert Watson <rwatson_at_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>Received on Tue May 13 2003 - 07:12:50 UTC
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