Re: FreeBSD-amd64 fails to start with SMP on quemu-kvm

Gleb Natapov
2013-01-13T09:23:48Z

On Fri, Jan 11, 2013 at 03:57:05PM +0100, Artur Samborski wrote:
> W dniu 09.01.2013 11:15, Gleb Natapov pisze:
> >On Tue, Jan 08, 2013 at 09:45:35PM +0100, Artur Samborski wrote:
> >>W dniu 08.01.2013 00:00, Marcelo Tosatti pisze:
> >>>On Mon, Jan 07, 2013 at 06:13:22PM +0100, Artur Samborski wrote:
> >>>>Hello,
> >>>>
> >>>>When i try to run FreeBSD-amd64 on more than 1 vcpu in quemu-kvm
> >>>>(Fedora Core 17) eg. to run FreeBSD-9.0-RELEASE-amd64 with:
> >>>>
> >>>>qemu-kvm -m 1024m -cpu host -smp 2 -cdrom
> >>>>/storage/iso/FreeBSD-9.0-RELEASE-amd64-dvd1.iso
> >>>>
> >>>>it freezes KVM with:
> >>>>
> >>>>KVM internal error. Suberror: 1
> >>>>emulation failure
> >>>>RAX=ffffffff80b0d4c0 RBX=000000000009f000 RCX=00000000c0000080
> >>>>RDX=0000000000000000
> >>>>RSI=000000000000d238 RDI=0000000000000000 RBP=0000000000000000
> >>>>RSP=0000000000000000
> >>>>R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000
> >>>>R11=0000000000000000
> >>>>R12=0000000000000000 R13=0000000000000000 R14=0000000000000000
> >>>>R15=0000000000000000
> >>>>RIP=000000000009f076 RFL=00010086 [--S--P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
> >>>>ES =0000 0000000000000000 0000ffff 0000f300 DPL=3 DS16 [-WA]
> >>>>CS =0008 0000000000000000 00000000 00209900 DPL=0 CS64 [--A]
> >>>>SS =9f00 000000000009f000 0000ffff 0000f300 DPL=3 DS16 [-WA]
> >>>>DS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA]
> >>>>FS =0000 0000000000000000 0000ffff 0000f300 DPL=3 DS16 [-WA]
> >>>>GS =0000 0000000000000000 0000ffff 0000f300 DPL=3 DS16 [-WA]
> >>>>LDT=0000 0000000000000000 0000ffff 00008200 DPL=0 LDT
> >>>>TR =0000 0000000000000000 0000ffff 00008b00 DPL=0 TSS64-busy
> >>>>GDT= 000000000009f080 00000020
> >>>>IDT= 0000000000000000 0000ffff
> >>>>CR0=80000011 CR2=0000000000000000 CR3=000000000009c000 CR4=00000030
> >>>>DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000
> >>>>DR3=0000000000000000
> >>>>DR6=00000000ffff0ff0 DR7=0000000000000400
> >>>>EFER=0000000000000501
> >>>>Code=00 00 00 80 0f 22 c0 ea 70 f0 09 00 08 00 48 b8 c0 d4 b0 80
> >>>><ff> ff ff ff ff e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> >>>>00 99 20 00 ff ff 00 00
> >>>
> >>>Artur,
> >>>
> >>>Can you check whether
> >>>
> >>>https://patchwork-mail.kernel.org/patch/1942681/
> >>>
> >>>fixes your problem
> >>>
> >>
> >>Hi, thanks for the reply.
> >>
> >>Unfortunately, the patch does not help. Attempt to start FreeBSD
> >>amd64 via quemu-kvm with -smp parameter greater than 1 fails in
> >>exactly the same way as before.
> >>
> >>The patch was applied to the kernel from the 3.6.11-1.fc17.src.rpm package.
> >>
> >>Do I need some additional patches?
> >>
> >>
> >Can you try queue branch from kvm.git?
> >
>
> Thanks for the advice - I used kernel from kvm.git(queue) and was
> able to run FreeBSD-amd guest with SMP on my kvm-host server without
> previous problems. Unfortunately, after few hours server was hung
> up. Case requires further investigations, but generally speaking we
> went forward. Unfortunately, experiments on the server are
> difficult, because it is used for everyday work.
>
Thanks for testing. This hang indeed looks like completely different
problem. What workload the VM was running?

--
Gleb.