On 02/24/2011 12:48 PM, Nikola Ciprich wrote:
On Thu, Feb 24, 2011 at 12:17:40PM +0200, Avi Kivity wrote: > On 02/24/2011 01:42 AM, Nikola Ciprich wrote: >> Hello Avi et al, >> seems like I've hit regression in 2.6.37: >> 32bit SMP centos guest stopped booting, they just hang during initrd phase. (haven't tried >> different distros) >> UP guest are OK. >> when I (forcibly) compiled kvm-kmod-2.6.36.2 and used it in 2.6.37, even >> the SMP guests boot fine. >> does somebody have a tip on where the problem could be, or should I bisect this? >> I tried on 2 different machines, host is x86_64, qemu-kvm 0.13.0, 0.14.0. >> If I shall provide more information (or bisect), please let me know. > > Bisect is of course great, if laborious. Meanwhile can you post 'info > registers' for all cpus? Is the guest consuming cpu? kvm_stat output? yes, it's eating 100% of one CPU core. kvm_stat for few seconds (hunged guest is the only one running on the host): kvm_entry 29327 9091 kvm_exit 29357 9090 kvm_inj_virq 24588 7609 kvm_apic_accept_irq 17146 5310 kvm_emulate_insn 12682 3931 kvm_apic 12530 3879 kvm_mmio 12525 3879 kvm_exit(APIC_ACCESS) 12525 3879 kvm_exit(HLT) 11262 3466 kvm_ioapic_set_irq 6532 2024 kvm_set_irq 6538 2024 kvm_pic_set_irq 6536 2024 kvm_exit(EXTERNAL_INTERRUPT) 4255 1300 kvm_ack_irq 2442 756 kvm_exit(PENDING_INTERRUPT) 1030 335 kvm_exit(IO_INSTRUCTION) 313 104 kvm_pio 312 104 kvm_age_page 18 6 kvm_exit(EPT_VIOLATION) 14 4 kvm_page_fault 12 4 kvm_exit(INVALID_STATE) 4 0 kvm_exit(VMLAUNCH) 3 0 kvm_exit(CPUID) 3 0 kvm_exit(DR_ACCESS) 2 0 kvm_exit(MSR_READ) 2 0 kvm_exit(PAUSE_INSTRUCTION) 1 0
Guest is churning along.
info registers: EAX=00000000 EBX=6a000000 ECX=0000000a EDX=000f41a8 ESI=000f41a8 EDI=00000000 EBP=c0690320 ESP=c0769f58 EIP=c042d137 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
Not very useful when the guest is making progress, I'm afraid.
I'll wait a bit with bisect whether You'll spot some obvious bug or not ;) thanks for Your time!
Can you try a little trace-cmd -e kvm -b 20000?
PS: I still owe You the kvm_stat comparison about this slow windows chkdsk problem, I'm aware of it, I just had to postpone this due to more urgent matters :( but I'll get back to it sooner or later..
Sure. Something similar that came up - sometimes Windows IDE drivers fall back to PIO mode. Are you using IDE? If so, please check whether it's using DMA or PIO.
-- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
