[Xen-devel] IPI lost or CPU cannot act on IPI!

[xiaoqinghang <leil@xxxxxxxxxxxxxxxxxx>]

Anybody has encountered this scene?

Hw env: one intel E5504 cpu, Tylersberg platform.
Sw env: Xen hypervisor contained in Sles11sp1.

Below is loginfo:

(XEN) [2011-06-01 07:12:47] Watchdog timer detects that CPU2 is stuck!
(XEN) [2011-06-01 07:12:47] ----[ Xen-4.0.0_21091_04-0.2.6  x86_64  debug=n  
Not tainted ]----
(XEN) [2011-06-01 07:12:47] CPU:    2
(XEN) [2011-06-01 07:12:47] RIP:    e008:[<ffff82c48010300c>] 
__bitmap_empty+0xc/0x90
(XEN) [2011-06-01 07:12:47] RFLAGS: 0000000000000202   CONTEXT: hypervisor
(XEN) [2011-06-01 07:12:47] rax: 00000000000000bf   rbx: ffff83036ff1ff28   
rcx: ffff82c4803943a0
(XEN) [2011-06-01 07:12:47] rdx: 0000000000000000   rsi: 0000000000000080   
rdi: ffff82c4803943a0
(XEN) [2011-06-01 07:12:47] rbp: ffff830368bf0218   rsp: ffff83036ff1f620   r8: 
 0000000000000080
(XEN) [2011-06-01 07:12:47] r9:  0000000000000000   r10: 0000000000000000   
r11: 0080000000000001
(XEN) [2011-06-01 07:12:47] r12: 0000000000000000   r13: 0000000000000100   
r14: 000000000000001c
(XEN) [2011-06-01 07:12:47] r15: ffff83036ff1ff28   cr0: 000000008005003b   
cr4: 00000000000026f0
(XEN) [2011-06-01 07:12:47] cr3: 000000020eb90000   cr2: 00000000f7b42000
(XEN) [2011-06-01 07:12:47] ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: 
e010   cs: e008
(XEN) [2011-06-01 07:12:47] Xen stack trace from rsp=ffff83036ff1f620:
(XEN) [2011-06-01 07:12:47]    ffff82c48016dc23 ffffc90000185c70 
0000000000000000 ffffc90000185c88
(XEN) [2011-06-01 07:12:47]    000000000000001c ffff83036ff1fd98 
ffff82c48010bb6d ffff83036ff1ff28
(XEN) [2011-06-01 07:12:47]    ffff83036ff1ff28 ffff83036ff1ff28 
ffff83036ff1f698 ffff83036ff1ff28
(XEN) [2011-06-01 07:12:47]    0000001c6ff1f730 ffffc900001859e8 
000000006ff1f728 ffff88048024e000
(XEN) [2011-06-01 07:12:47]    0000000000000000 0000000000000000 
0006000000000030 00000000001b612d
(XEN) [2011-06-01 07:12:47]    ffff830368bd5180 ffff83033cad0000 
ffff88048026b000 0000000000000000
(XEN) [2011-06-01 07:12:47]    0000000000000000 0006000000000070 
000000000003d054 ffff830368bd5380
(XEN) [2011-06-01 07:12:47]    ffff83033cad0000 ffff8804801e9000 
0000000000000000 0000000000000000
(XEN) [2011-06-01 07:12:47]    0006000000000083 00000000000549df 
ffff830368bd5418 ffff83033cad0000
(XEN) [2011-06-01 07:12:47]    ffff88048023c000 0000000000000000 
0000000000000000 0006000000000047
(XEN) [2011-06-01 07:12:47]    00000000001b5e23 ffff830368bd5238 
ffff83033cad0000 ffff8804801c4000
(XEN) [2011-06-01 07:12:47]    0000000000000000 0000000000000000 
000600000000004d 00000000000549e0
(XEN) [2011-06-01 07:12:47]    ffff830368bd5268 ffff83033cad0000 
ffff8804801a0000 0000000000000000
(XEN) [2011-06-01 07:12:47]    0000000000000000 000600000000004b 
00000000000549e1 ffff830368bd5258
(XEN) [2011-06-01 07:12:47]    ffff83033cad0000 ffff8804801d0000 
0000000000000000 0000000000000000
(XEN) [2011-06-01 07:12:47]    0006000000000013 00000000001b5e23 
ffff830368bd5098 ffff83033cad0000
(XEN) [2011-06-01 07:12:47]    ffff8804801a9000 0000000000000000 
0000000000000000 0006000000000040
(XEN) [2011-06-01 07:12:47]    00000000000549e2 ffff830368bd5200 
ffff83033cad0000 ffff88048023d000
(XEN) [2011-06-01 07:12:47]    0000000000000000 0000000000000000 
0006000000000067 00000000000549e3
(XEN) [2011-06-01 07:12:47]    ffff830368bd5338 ffff83033cad0000 
ffff8804801e0000 0000000000000000
(XEN) [2011-06-01 07:12:47] Xen call trace:
(XEN) [2011-06-01 07:12:47]    [<ffff82c48010300c>] __bitmap_empty+0xc/0x90
(XEN) [2011-06-01 07:12:47]    [<ffff82c48016dc23>] flush_area_mask+0x103/0x130
(XEN) [2011-06-01 07:12:47]    [<ffff82c48010bb6d>] 
gnttab_unmap_grant_ref+0x25d/0x330
(XEN) [2011-06-01 07:12:47]    [<ffff82c48011a280>] csched_vcpu_wake+0x110/0x1b0
(XEN) [2011-06-01 07:12:47]    [<ffff82c48014c6bd>] vcpu_kick+0x1d/0x80
(XEN) [2011-06-01 07:12:47]    [<ffff82c4801ae2da>] vioapic_deliver+0xfa/0x2c0
(XEN) [2011-06-01 07:12:47]    [<ffff82c48010e4c2>] 
do_grant_table_op+0x72/0x19b0
(XEN) [2011-06-01 07:12:47]    [<ffff82c4801a949d>] 
__hvm_pci_intx_assert+0xed/0x100
(XEN) [2011-06-01 07:12:47]    [<ffff82c48010e8b7>] 
do_grant_table_op+0x467/0x19b0
(XEN) [2011-06-01 07:12:47]    [<ffff82c4801088c3>] evtchn_send+0x83/0x150
(XEN) [2011-06-01 07:12:47]    [<ffff82c480108ee2>] 
do_event_channel_op+0x552/0x10d0
(XEN) [2011-06-01 07:12:47]    [<ffff82c48014c6bd>] vcpu_kick+0x1d/0x80
(XEN) [2011-06-01 07:12:47]    [<ffff82c4801487f5>] reprogram_timer+0x55/0x90
(XEN) [2011-06-01 07:12:48]    [<ffff82c480121454>] 
timer_softirq_action+0x214/0x3e0
(XEN) [2011-06-01 07:12:48]    [<ffff82c48011f470>] __do_softirq+0x70/0x90
(XEN) [2011-06-01 07:12:48]    [<ffff82c4801f0169>] syscall_enter+0xa9/0xae
(XEN) [2011-06-01 07:12:48]    
(XEN) [2011-06-01 07:12:48] 
(XEN) [2011-06-01 07:12:48] ****************************************
(XEN) [2011-06-01 07:12:48] Panic on CPU 2:
(XEN) [2011-06-01 07:12:48] FATAL TRAP: vector = 2 (nmi)
(XEN) [2011-06-01 07:12:48] [error_code=0000] 
(XEN) [2011-06-01 07:12:48] ****************************************
(XEN) [2011-06-01 07:12:48] 
(XEN) [2011-06-01 07:12:48] Reboot in five seconds...

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