[Xen-devel] CPU hangs

["Roger Cruz" <roger.cruz@xxxxxxxxxxxxxxxxxxx>]

I am experiencing host hangs with 3.4.2 so I turned on the watchdog and finally got something useful to start tracking.  Before I do, I always like to make sure that this is not something that has already been reported and fixed.  Anyone know of any such CPU deadlocks and a fix?

 

Thanks

 

(XEN) multi.c:1077:d2 gfn f1159 (mfn 60192) cleared vram pte
(XEN) multi.c:1077:d2 gfn f115a (mfn 60191) cleared vram pte
(XEN) multi.c:1077:d2 gfn f115b (mfn 60190) cleared vram pte
(XEN) multi.c:1077:d2 gfn f115c (mfn 6018f) cleared vram pte
(XEN) multi.c:1077:d2 gfn f115d (mfn 6018e) cleared vram pte
(XEN) multi.c:1077:d2 gfn f115e (mfn 6018d) cleared vram pte
(XEN) multi.c:1077:d2 gfn f115f (mfn 6018c) cleared vram pte
(XEN) multi.c:1077:d2 gfn f1160 (mfn 6018b) cleared vram pte
(XEN) multi.c:1077:d2 gfn f1161 (mfn 6018a)(XEN) Watchdog timer detects that CPU0 is stuck!
(XEN) ----[ Xen-3.4.2  x86_64  debug=n  Tainted:    C ]----
(XEN) CPU:    0
(XEN) RIP:    e008:[<ffff828c80126f98>] ns16550_tx_empty+0x28/0x30
(XEN) RFLAGS: 0000000000000006   CONTEXT: hypervisor
(XEN) rax: 0000000000000000   rbx: ffff828c801ef260   rcx: 0000000000000001
(XEN) rdx: 0000000000002005   rsi: 0000000000000020   rdi: ffff828c801ef260
(XEN) rbp: 0000000000000020   rsp: ffff828c8024faa0   r8:  0000000000004000
(XEN) r9:  0000000000003fff   r10: ffff828c80268360   r11: 0000000000000400
(XEN) r12: ffff828c801ef2dc   r13: 0000000000000020   r14: ffff828c80267ecc
(XEN) r15: 0000000000000000   cr0: 000000008005003b   cr4: 00000000000026f0
(XEN) cr3: 00000000a17ea000   cr2: 0000000097a20000
(XEN) ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: 0000   cs: e008
(XEN) Xen stack trace from rsp=ffff828c8024faa0:
(XEN)    ffff828c80127776 ffff828c801ef260 0000000000000000 ffff828c801ef2dc
(XEN)    ffff828c80127e00 0000000800000000 0000000000000086 0000000000000400
(XEN)    ffff828c80267ea6 ffff828c80267edc ffff828c8024fb40 00000000000f1161
(XEN)    0000000000000000 ffff8300b781c000 ffff828c80126019 0000000000000286
(XEN)    ffff828c8012662e 0000003000000030 ffff828c8024fc18 ffff828c8024fb48
(XEN)    ffff828c80267ea6 0000000000000000 ffff828c801e3b9c 0000000000000435
(XEN)    0000000000000002 00000000000f1161 000000000006018a ffff8300b781c000
(XEN)    ffff8300b75da000 0000000400000000 ffff8180006022b0 0000000078e31023
(XEN)    0000000078e31021 0000000000078e31 ffff8180006022b0 ffff8180006022b0
(XEN)    ffff828c801b4870 0000000000000000 ffff828400c03160 0000000000000000
(XEN)    ffff8300a08a4b08 0000000000000000 000000006018a023 ffff8300a08a4b08
(XEN)    0000000000000000 000000006018a023 ffff828c801b4839 ffff8300b75da000
(XEN)    ffff828c00000001 ffffffffffffffff 000000000006018a 0000000000000000
(XEN)    00000001801b7221 00000000a08a4b08 00000000000a08a4 0000000078e32061
(XEN)    ffff830078e32b08 ffff8300a08a4b10 ffff830078e32ff8 ffff8300b7801b08
(XEN)    ffff828c8024fcd8 ffff8300b75da000 ffff828c801b6306 ffff828c80228740
(XEN)    ffff8300b7801000 00000000000a08a4 ffff828c8024fcc8 ffff828c8024ff28
(XEN)    ffff828c8024fce4 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000100000100 ffff828400f1c640 0000000000f1c640 0000000000078e32
(XEN)    ffff8300b75da000 ffff828400f1c640 00000000000b7801 0000000000000000
(XEN) Xen call trace:
(XEN)    [<ffff828c80126f98>] ns16550_tx_empty+0x28/0x30
(XEN)    [<ffff828c80127776>] __serial_putc+0x86/0x180
(XEN)    [<ffff828c80127e00>] serial_puts+0x90/0x120
(XEN)    [<ffff828c80126019>] __putstr+0x9/0xa0
(XEN)    [<ffff828c8012662e>] printk+0xee/0x1d0
(XEN)    [<ffff828c801b4870>] shadow_set_l1e+0x490/0x4e0
(XEN)    [<ffff828c801b4839>] shadow_set_l1e+0x459/0x4e0
(XEN)    [<ffff828c801b6306>] sh_resync_l1__guest_3+0x156/0x1c0
(XEN)    [<ffff828c801aacee>] _sh_resync+0x1be/0x1d0
(XEN)    [<ffff828c801ac03c>] sh_resync_all+0x3bc/0x450
(XEN)    [<ffff828c8019d254>] vmx_msr_write_intercept+0x134/0x550
(XEN)    [<ffff828c801ad8a7>] sh_update_paging_modes+0xd7/0x390
(XEN)    [<ffff828c801ae624>] shadow_update_paging_modes+0x74/0xd0
(XEN)    [<ffff828c80182726>] hvm_set_cr4+0xa6/0xb0
(XEN)    [<ffff828c8019f272>] vmx_vmexit_handler+0x11f2/0x18d0
(XEN)    [<ffff828c80127500>] ns16550_poll+0x0/0xa0
(XEN)    [<ffff828c80138f62>] reprogram_timer+0x62/0xa0
(XEN)    [<ffff828c8018eedb>] pt_update_irq+0x7b/0x110
(XEN)    [<ffff828c8018a507>] hvm_vcpu_has_pending_irq+0x37/0x60
(XEN)    [<ffff828c80198715>] vmx_intr_assist+0x55/0x190
(XEN)    [<ffff828c801984e3>] vmx_asm_do_vmentry+0x0/0xdd
(XEN)   
(XEN)
(XEN) ****************************************
(XEN) Panic on CPU 0:
(XEN) FATAL TRAP: vector = 2 (nmi)
(XEN) [error_code=0000] , IN INTERRUPT CONTEXT
(XEN) ****************************************
(XEN)

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