illumos gate

witch% mdb unix.0 vmcore.0
mdb: warning: dump is from SunOS 5.11 illumos-380fd67; dcmds and macros may not match kernel implementation
Loading modules: [ unix genunix specfs dtrace mac cpu.generic uppc pcplusmp scsi_vhci zfs sd ip hook neti sockfs arp usba fctl stmf stmf_sbd mm idm cpc crypto fcip fcp md random emlxs lofs ufs logindmux nsmb ptm smbsrv nfs sppp ]
> ::panicinfo
             cpu                0
          thread ffffff003d0cbc40
         message I/O to pool 'rpool' appears to be hung.
**skipped**

> $C
ffffff003d0cba20 vpanic()
ffffff003d0cba70 vdev_deadman+0x10b(ffffff09048db680)
ffffff003d0cbac0 vdev_deadman+0x4a(ffffff0910d2f980)
ffffff003d0cbaf0 spa_deadman+0xad(ffffff0910b4b000)
ffffff003d0cbb90 cyclic_softint+0xfd(fffffffffbc32620, 0)
ffffff003d0cbba0 cbe_low_level+0x14()
ffffff003d0cbbf0 av_dispatch_softvect+0x78(2)
ffffff003d0cbc20 dispatch_softint+0x39(0, 0)
ffffff003d005a20 switch_sp_and_call+0x13()
ffffff003d005a60 dosoftint+0x44(ffffff003d005ad0)
ffffff003d005ac0 do_interrupt+0xba(ffffff003d005ad0, 0)
ffffff003d005ad0 _interrupt+0xba()
ffffff003d005bc0 mach_cpu_idle+6()
ffffff003d005bf0 cpu_idle+0x11a()
ffffff003d005c00 cpu_idle_adaptive+0x13()
ffffff003d005c20 idle+0xa7()
ffffff003d005c30 thread_start+8()