Freebsd image from Qemu hangs on booting in KVM
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From: Anjali Kulkarni on 4 Aug 2010 22:40 Hi, I have a problem similar to the one seen on this list before - when I boot my freebsd based(but modified) image in Qemu with KVM on CentOS, then after almost booting completely, the image hangs - just before the login prompt is seen. If I do not have KVM ie plain CenOS with Qemu, then this issue does not occur. Has anyone seen this before and any ideas how to debug this? Thanks Anjali-- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Avi Kivity on 5 Aug 2010 04:50 On 08/05/2010 05:20 AM, Anjali Kulkarni wrote: > Hi, > > I have a problem similar to the one seen on this list before - when I boot my freebsd based(but modified) image in Qemu with KVM on CentOS, then after almost booting completely, the image hangs - just before the login prompt is seen. If I do not have KVM ie plain CenOS with Qemu, then this issue does not occur. Has anyone seen this before and any ideas how to debug this? First step is to issue 'info registers' and 'x/30i $eip-20' from the monitor when it hangs (qemu -monitor stdio makes cut'n'paste easier). -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Anjali Kulkarni on 5 Aug 2010 17:00 Thanks Avi, I am trying to reproduce this on another setup, and do not see the issue. My understanding is to run KVM + Qemu, I only need to install KVM modules, and Qemu does not need to be modified. Is that correct? I see [root(a)ipg-virt01 anjali]# lsmod | grep kvm kvm_intel 87016 0 kvm 211496 1 kvm_intel [root(a)ipg-virt01 anjali]# modprobe -l 'kvm*' /lib/modules/2.6.18-164.el5/kernel/extra/kvm.ko /lib/modules/2.6.18-164.el5/kernel/extra/kvm-amd.ko /lib/modules/2.6.18-164.el5/kernel/extra/kvm-intel.ko And then I run Qemu, as I did, before installing KVM. It should just use KVM? Is there any way I can check? Btw, when it hangs, I cannot even press any key, so not sure how I can get those commands you suggest below.. Anjali On 8/5/10 1:46 AM, "Avi Kivity" <avi(a)redhat.com> wrote: > On 08/05/2010 05:20 AM, Anjali Kulkarni wrote: >> Hi, >> >> I have a problem similar to the one seen on this list before - when I boot my >> freebsd based(but modified) image in Qemu with KVM on CentOS, then after >> almost booting completely, the image hangs - just before the login prompt is >> seen. If I do not have KVM ie plain CenOS with Qemu, then this issue does not >> occur. Has anyone seen this before and any ideas how to debug this? > > First step is to issue 'info registers' and 'x/30i $eip-20' from the > monitor when it hangs (qemu -monitor stdio makes cut'n'paste easier). -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Anjali Kulkarni on 5 Aug 2010 18:00
Ok, I could reproduce the problem, and also get the info you asked for: (qemu) info registers EAX=00000000 EBX=c27166c0 ECX=00000013 EDX=c0bf85e0 ESI=c057cea0 EDI=00000000 EBP=d35a5ce4 ESP=d35a5ce4 EIP=c09e48ba EFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0028 00000000 ffffffff 00c09300 CS =0020 00000000 ffffffff 00c09b00 SS =0028 00000000 ffffffff 00c09300 DS =0028 00000000 ffffffff 00c09300 FS =0008 c0c6c900 ffffffff 00c09300 GS =003b 00000000 ffffffff 00c0f300 LDT=0050 c0c6c720 00000087 0000e200 TR =0048 c0c6c940 00000067 00008b00 GDT= c0c6c680 00000097 IDT= c0c6db40 000007ff CR0=e005003b CR2=4808e000 CR3=1f54e000 CR4=00000090 DR0=00000000 DR1=00000000 DR2=00000000 DR3=00000000 DR6=ffff0ff0 DR7=00000400 FCW=127f FSW=0000 [ST=0] FTW=00 MXCSR=00000000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 (qemu) x/30i $eip-20 0x00000000c09e48a6: add %al,(%eax) 0x00000000c09e48a8: leave 0x00000000c09e48a9: ret 0x00000000c09e48aa: push %ebp 0x00000000c09e48ab: mov %esp,%ebp 0x00000000c09e48ad: leave 0x00000000c09e48ae: ret 0x00000000c09e48af: push %ebp 0x00000000c09e48b0: mov %esp,%ebp 0x00000000c09e48b2: hlt 0x00000000c09e48b3: jmp 0xc09e48b2 0x00000000c09e48b5: push %ebp 0x00000000c09e48b6: mov %esp,%ebp 0x00000000c09e48b8: sti 0x00000000c09e48b9: hlt 0x00000000c09e48ba: leave 0x00000000c09e48bb: ret 0x00000000c09e48bc: push %ebp 0x00000000c09e48bd: mov %esp,%ebp 0x00000000c09e48bf: mov %cr0,%eax 0x00000000c09e48c2: or $0x5002a,%eax 0x00000000c09e48c7: mov %eax,%cr0 0x00000000c09e48ca: movl 0xc0c6c888,%gs 0x00000000c09e48d0: leave 0x00000000c09e48d1: ret 0x00000000c09e48d2: push %ebp 0x00000000c09e48d3: mov %esp,%ebp 0x00000000c09e48d5: sub $0x8,%esp 0x00000000c09e48d8: mov %ebx,(%esp,1) 0x00000000c09e48db: mov %esi,0x4(%esp,1) (qemu) On 8/5/10 1:51 PM, "Anjali Kulkarni" <anjali(a)juniper.net> wrote: > Thanks Avi, > I am trying to reproduce this on another setup, and do not see the issue. > My understanding is to run KVM + Qemu, I only need to install KVM modules, > and Qemu does not need to be modified. Is that correct? > I see > > [root(a)ipg-virt01 anjali]# lsmod | grep kvm > kvm_intel 87016 0 > kvm 211496 1 kvm_intel > > [root(a)ipg-virt01 anjali]# modprobe -l 'kvm*' > /lib/modules/2.6.18-164.el5/kernel/extra/kvm.ko > /lib/modules/2.6.18-164.el5/kernel/extra/kvm-amd.ko > /lib/modules/2.6.18-164.el5/kernel/extra/kvm-intel.ko > > And then I run Qemu, as I did, before installing KVM. It should just use > KVM? Is there any way I can check? > > Btw, when it hangs, I cannot even press any key, so not sure how I can get > those commands you suggest below.. > > Anjali > > On 8/5/10 1:46 AM, "Avi Kivity" <avi(a)redhat.com> wrote: > >> On 08/05/2010 05:20 AM, Anjali Kulkarni wrote: >>> Hi, >>> >>> I have a problem similar to the one seen on this list before - when I boot >>> my >>> freebsd based(but modified) image in Qemu with KVM on CentOS, then after >>> almost booting completely, the image hangs - just before the login prompt is >>> seen. If I do not have KVM ie plain CenOS with Qemu, then this issue does >>> not >>> occur. Has anyone seen this before and any ideas how to debug this? >> >> First step is to issue 'info registers' and 'x/30i $eip-20' from the >> monitor when it hangs (qemu -monitor stdio makes cut'n'paste easier). > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |