Re: panic: ifc_free_unit: bit is already cleared

On Wed, Oct 05, 2005 at 03:49:03PM +1300, Andrew Thompson wrote:
A> Hi,
A> 
A> I have found a repeatable panic with network device cloning, unfortunatly I am
A> unable to dump on this box. This is sparc64 with a 2 day old current.
A> 
A> 
A> [root_at_dev]# kldload if_vlan
A> [root_at_dev]# for i in `jot 100 1`; do
A> for> ifconfig xl0.$i create
A> for> done
A> [root_at_dev]# kldunload if_vlan

shouldn't it return EBUSY here?

A> panic: ifc_free_unit: bit is already cleared
A> cpuid = 0
A> KDB: enter: panic
A> [thread pid 4527 tid 100089 ]
A> Stopped at      kdb_enter+0x3c: ta              %xcc, 1
A> db> trace
A> Tracing pid 4527 tid 100089 td 0xfffff8000ab8e4c0
A> panic() at panic+0x164
A> ifc_free_unit() at ifc_free_unit+0x50
A> vlan_clone_destroy() at vlan_clone_destroy+0x8c
A> vlan_modevent() at vlan_modevent+0x44
A> module_unload() at module_unload+0x60
A> linker_file_unload() at linker_file_unload+0x7c
A> kern_kldunload() at kern_kldunload+0x84
A> kldunloadf() at kldunloadf+0x1c
A> syscall() at syscall+0x2dc
A> -- syscall (444, FreeBSD ELF64, kldunloadf) %o7=0x100b58 --
A> userland() at 0x40391348
A> user trace: trap %o7=0x100b58
A> pc 0x40391348, sp 0x7fdffffdde1
A> pc 0x100894, sp 0x7fdffffe2c1
A> pc 0x40209474, sp 0x7fdffffe381
A> done
A> db> 
A> 
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