Hello everyboy, while installing new virt machine today, I noticed that 2.6.32 x86_64 SMP guests are hanging if they have paravirt-clock enabled... Either they don't finish booting at all, or boot but hang soon after.. Such a hanged guest fully loads all host cpus.. The host is 6core x86_64 runnig 2.6.37.6 with 24GB RAM.
kvm_stat:
kvm_exit(EXTERNAL_INTERRUPT) 15682 1643
kvm_exit 15514 1643
kvm_entry 15416 1643
kvm_set_irq 1 0
kvm_msi_set_irq 1 0
kvm_apic_accept_irq 1 0
kvm_exit(VMCLEAR) 6 0
kvm_exit(VMON) 6 0
kvm_exit(PAUSE_INSTRUCTION) 5 0
kvm_exit(MCE_DURING_VMENTRY) 5 0
kvm_exit(MWAIT_INSTRUCTION) 5 0
kvm_exit(DR_ACCESS) 5 0
kvm_exit(EPT_VIOLATION) 5 0
kvm_exit(NMI_WINDOW) 5 0
kvm_exit(VMPTRLD) 5 0
kvm_exit(TASK_SWITCH) 5 0
kvm_exit(VMREAD) 5 0
kvm_exit(VMLAUNCH) 5 0
kvm_exit(RDPMC) 5 0
perf top:
16.00 10.9% add_preempt_count [kernel.kallsyms]
16.00 10.9% do_raw_spin_lock [kernel.kallsyms]
15.00 10.2% sub_preempt_count [kernel.kallsyms]
8.00 5.4% irq_exit [kernel.kallsyms]
7.00 4.8% vmx_vcpu_run
/lib/modules/2.6.37lb.09/kernel/arch/x86/kvm/kvm-intel.ko
7.00 4.8% page_fault [kernel.kallsyms]
5.00 3.4% mempool_free [kernel.kallsyms]
info registers:
RAX=0000000000f42400 RBX=ffffffff81533f00 RCX=0000000000000016
RDX=00077358f5000000
RSI=000000001dcd6500 RDI=0000000000000001 RBP=ffff880009a03ee8
RSP=ffff880009a03ee8
R8 =0000000000000016 R9 =000000000000000a R10=00000000ffffffff
R11=0000000000000000
R12=2a4d17d38f3303c1 R13=ffffffff815fd000 R14=ffffffff81592140
R15=0000000000093510
RIP=ffffffff810767cb RFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA]
CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA]
SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA]
DS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA]
FS =0000 0000000000000000 000fffff 00000000
GS =0000 ffff880009a00000 000fffff 00000000
LDT=0000 0000000000000000 000fffff 00000000
TR =0040 ffff880009a11880 00002087 00008b00 DPL=0 TSS64-busy
GDT= ffff880009a04000 0000007f
IDT= ffffffff815fd000 00000fff
CR0=8005003b CR2=00007f424e540700 CR3=000000021690c000 CR4=000006f0
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000
DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
EFER=0000000000000d01
FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80
FPR0=0000000000000000 0000 FPR1=0000000000000000 0000
FPR2=0000000000000000 0000 FPR3=0000000000000000 0000
FPR4=0000000000000000 0000 FPR5=0000000000000000 0000
FPR6=0000000000000000 0000 FPR7=0000000000000000 0000
XMM00=00000000000000000000000000000000 XMM01=0000000000000000000000003c23d70a
XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000
XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000
XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000
XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000
XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000
XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000
XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000
info cpus:
* CPU #0: pc=0xffffffff8105d4a0 thread_id=19639
CPU #1: pc=0xffffffff81013140 thread_id=19640
CPU #2: pc=0xffffffff8102a1b6 (halted) thread_id=19641
CPU #3: pc=0xffffffff81341521 thread_id=19642
CPU #4: pc=0xffffffff810415d8 thread_id=19643
CPU #5: pc=0xffffffff811ca521 thread_id=19644
CPU #6: pc=0xffffffff81013140 thread_id=19646
CPU #7: pc=0xffffffff8102a1b6 (halted) thread_id=19647
and here are trace-cmds for all cpus:
http://nik.lbox.cz/public/trace-cmd.tar.bz2
Could somebody please have a look at this?
I also tried 2.6.38.5, but the result is the same...
cheers
nik
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