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Description
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Testing resume of the Windows PV drivers:
- start guest domain running winxp,
- virsh save winxp winxp.save,
- virsh restore winxp.save,
- networking is now broken,
- disable network device 0 in winxp device manager,
- enable network device 0 in winxp device manager,
- examine the ensuing panic:
> $c
xnb_recv+0x1fd(ffffff02cb55c000)
xnb_intr+0x3a(ffffff02cb55c000)
av_dispatch_autovect+0x78(106)
dispatch_hardint+0x33(106, 0)
switch_sp_and_call+0x13()
do_interrupt+0x9b(ffffff000ef735f0, deadbeef)
xen_callback_handler+0x370(ffffff000ef735f0, deadbeef)
xen_callback+0xcd()
intr_restore+0x81()
add_avintr+0x11a(ffffff02d20d6318, 6, fffffffff8662470, ffffff02cbd320c8, 106, ffffff02cb55c000)
xpvd_enable_intr+0x76(ffffff02c78bc000, ffffff02d20d6318, 0)
xpvd_intr_ops+0x148(ffffff02c41966e0, ffffff02c78bc000, 8, ffffff02d20d6318, 0)
i_ddi_intr_ops+0x54(ffffff02c78bc000, ffffff02c78bc000, 8, ffffff02d20d6318, 0)
ddi_intr_enable+0x5d(ffffff02d20d6318)
ddi_add_intr+0xb1(ffffff02c78bc000, 0, 0, 0, fffffffff8662470, ffffff02cb55c000)
xnb_connect_rings+0xa0c(ffffff02c78bc000)
xnb_oe_state_change+0x4c(ffffff02c78bc000, ffffff02c7f1c068, 0, ffffff000ef73bc4)
ndi_event_run_callbacks+0x94(ffffff02c801b780, ffffff02c78bc000, ffffff02c7f1c068, ffffff000ef73bc4)
xpvd_post_event+0x24(ffffff02c41966e0, ffffff02c78bc000, ffffff02c7f1c068, ffffff000ef73bc4)
ndi_post_event+0x2d(ffffff02c78bc000, ffffff02c78bc000, ffffff02c7f1c068, ffffff000ef73bc4)
i_xvdi_oestate_handler+0x71(ffffff02c78bc000)
taskq_thread+0x1a7(ffffff02d22628a8)
thread_start+8()
Dump is currently on testboxintel.germany.sun.com, /var/crash/*/*.3.
The xnb instance for which we're fielding an interrupt is the same one that we're trying to
connect to the frontend. Given that we didn't update our state to 'Connected', we shouldn't
be seeing any interrupts from the peer yet.
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