(CC Zachary) well, I should also note that while testing 2.6.37 host, I had Zach's patch fixing guest clock regression applied... n. On Sun, May 08, 2011 at 08:33:04PM +0200, Nikola Ciprich wrote: > 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 > > > > > -- > ------------------------------------- > Ing. Nikola CIPRICH > LinuxBox.cz, s.r.o. > 28. rijna 168, 709 01 Ostrava > > tel.: +420 596 603 142 > fax: +420 596 621 273 > mobil: +420 777 093 799 > > www.linuxbox.cz > > mobil servis: +420 737 238 656 > email servis: servis@xxxxxxxxxxx > ------------------------------------- -- ------------------------------------- Ing. Nikola CIPRICH LinuxBox.cz, s.r.o. 28. rijna 168, 709 01 Ostrava tel.: +420 596 603 142 fax: +420 596 621 273 mobil: +420 777 093 799 www.linuxbox.cz mobil servis: +420 737 238 656 email servis: servis@xxxxxxxxxxx -------------------------------------
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