On 05/06/2020 13:01, Marek Marczykowski-Górecki wrote: > On Fri, Jun 05, 2020 at 11:22:46AM +0200, Jan Beulich wrote: >> On 05.06.2020 11:09, Jan Beulich wrote: >>> On 04.06.2020 16:25, Marek Marczykowski-Górecki wrote: >>>> (XEN) hvm.c:1620:d6v0 All CPUs offline -- powering off. >>>> (XEN) d3v0 handle_pio port 0xb004 read 0x0000 >>>> (XEN) d3v0 handle_pio port 0xb004 read 0x0000 >>>> (XEN) d3v0 handle_pio port 0xb004 write 0x0001 >>>> (XEN) d3v0 handle_pio port 0xb004 write 0x2001 >>>> (XEN) d4v0 XEN_DMOP_remote_shutdown domain 3 reason 0 >>>> (XEN) d4v0 domain 3 domain_shutdown vcpu_id 0 defer_shutdown 1 >>>> (XEN) d4v0 XEN_DMOP_remote_shutdown domain 3 done >>>> (XEN) hvm.c:1620:d5v0 All CPUs offline -- powering off. >>>> (XEN) d1v0 handle_pio port 0xb004 read 0x0000 >>>> (XEN) d1v0 handle_pio port 0xb004 read 0x0000 >>>> (XEN) d1v0 handle_pio port 0xb004 write 0x0001 >>>> (XEN) d1v0 handle_pio port 0xb004 write 0x2001 >>>> (XEN) d2v0 XEN_DMOP_remote_shutdown domain 1 reason 0 >>>> (XEN) d2v0 domain 1 domain_shutdown vcpu_id 0 defer_shutdown 1 >>>> (XEN) d2v0 XEN_DMOP_remote_shutdown domain 1 done >>>> (XEN) grant_table.c:3702:d0v0 Grant release 0x3 ref 0x11d flags 0x2 d6 >>>> (XEN) grant_table.c:3702:d0v0 Grant release 0x4 ref 0x11e flags 0x2 d6 >>>> (XEN) d3v0 handle_pio port 0xb004 read 0x0000 >>> Perhaps in this message could you also log >>> v->domain->is_shutting_down, v->defer_shutdown, and >>> v->paused_for_shutdown? >> And v->domain->is_shut_down please. > Here it is: > > (XEN) hvm.c:1620:d6v0 All CPUs offline -- powering off. > (XEN) d3v0 handle_pio port 0xb004 read 0x0000 is_shutting_down 0 > defer_shutdown 0 paused_for_shutdown 0 is_shut_down 0 > (XEN) d3v0 handle_pio port 0xb004 read 0x0000 is_shutting_down 0 > defer_shutdown 0 paused_for_shutdown 0 is_shut_down 0 > (XEN) d3v0 handle_pio port 0xb004 write 0x0001 is_shutting_down 0 > defer_shutdown 0 paused_for_shutdown 0 is_shut_down 0 > (XEN) d3v0 handle_pio port 0xb004 write 0x2001 is_shutting_down 0 > defer_shutdown 0 paused_for_shutdown 0 is_shut_down 0 > (XEN) d4v0 XEN_DMOP_remote_shutdown domain 3 reason 0 > (XEN) d4v0 domain 3 domain_shutdown vcpu_id 0 defer_shutdown 1 > (XEN) d4v0 XEN_DMOP_remote_shutdown domain 3 done > (XEN) hvm.c:1620:d5v0 All CPUs offline -- powering off. > (XEN) d1v0 handle_pio port 0xb004 read 0x0000 is_shutting_down 0 > defer_shutdown 0 paused_for_shutdown 0 is_shut_down 0 > (XEN) d1v0 handle_pio port 0xb004 read 0x0000 is_shutting_down 0 > defer_shutdown 0 paused_for_shutdown 0 is_shut_down 0 > (XEN) d1v0 handle_pio port 0xb004 write 0x0001 is_shutting_down 0 > defer_shutdown 0 paused_for_shutdown 0 is_shut_down 0 > (XEN) d1v0 handle_pio port 0xb004 write 0x2001 is_shutting_down 0 > defer_shutdown 0 paused_for_shutdown 0 is_shut_down 0 > (XEN) d2v0 XEN_DMOP_remote_shutdown domain 1 reason 0 > (XEN) d2v0 domain 1 domain_shutdown vcpu_id 0 defer_shutdown 1 > (XEN) d2v0 XEN_DMOP_remote_shutdown domain 1 done > (XEN) grant_table.c:3702:d0v1 Grant release 0x3 ref 0x125 flags 0x2 d6 > (XEN) grant_table.c:3702:d0v1 Grant release 0x4 ref 0x126 flags 0x2 d6 > (XEN) d1v0 handle_pio port 0xb004 read 0x0000 is_shutting_down 1 > defer_shutdown 1 paused_for_shutdown 0 is_shut_down 0 > (XEN) d1v0 Unexpected PIO status 1, port 0xb004 read 0xffff > > (and then the stacktrace saying it's from vmexit handler) > > Regarding BUG/WARN - do you think I could get any more info then? I > really don't mind crashing that system, it's a virtual machine > currently used only for debugging this issue.
I specifically recommended BUG() so it crashed cleanly and didn't loop infinitely spewing into the logs. From the analysis so far, whatever is going wrong is going wrong between XEN_DMOP_remote_shutdown and the first bad PIO, so I don't think letting the system loop further is going to be helpful. ~Andrew
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