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Re: [Qemu-devel] Suggested Parameters for SLES 10 64-bit

From: Alexander Graf
Subject: Re: [Qemu-devel] Suggested Parameters for SLES 10 64-bit
Date: Tue, 18 May 2010 12:07:25 +0200

On 18.05.2010, at 11:57, Peter Lieven wrote:

> Alexander Graf wrote:
>> On 18.05.2010, at 11:14, Peter Lieven wrote:
>>> Hi,
>>> we try to migrate some Suse Linux Enterprise 10 64-bit guests from abandoned
>>> Virtual Iron by Iron Port to qemu-kvm 0.12.4. Unfortunately the guests are 
>>> not
>>> very stable by now. With ACPI they end up in a kernel panic at boot time 
>>> and without
>>> they occasionally hang during boot or shortly after.
>> Could you please post the panics you get? What does hang during boot mean?
> with acpi=off it hangs after starting powersaved
>> The easiest way to get them is probably to start the guest with -serial 
>> stdio and pass "console=ttyS0" on the grub command line.
> without acpi=off it hangs always with a lookup. one time it happened directly 
> after initializing hpet0.
> btw, is it safe to turn of hpet for linux guests in genereal?
> regarding missing kvm-clock. i made the experience that some guests crash 
> after live migration
> with clocksource=kvm_clock while they don't with clocksource=acpi_pm. this is 
> off topic here,
> but its also something i would like to debug with someone.
> Starting cupsd                                                        done
> Starting ZENworks Management Daemon                                   done
> IA-32 Microcode Update Driver v1.14 unregistered
> Starting INET services. (xinetd)                                      done
> Checking/updating CPU microcode                                       done
> NET: Registered protocol family 10
> lo: Disabled Privacy Extensions
> IPv6 over IPv4 tunneling driver
> ..dead
> Try to get initial date and time via NTP from           done
> Starting network time protocol daemon (NTPD)                          done
> Starting Name Service Cache Daemon                                    done
> NetBackup SAN Client Fibre Transport daemon started.
> Starting powersaved:                                                  done
> Starting mail service (Postfix)
> NMI Watchdog detected LOCKUP on CPU 0

What host kernel are you running on? Or rather, what host kvm module version?

> CPU 0
> Modules linked in: ipv6 button battery ac apparmor aamatch_pcre loop usbhid 
> dm_mod 8139cp mii uhci_hcd e1000 i2c_piix4 usbcore ide_cd i2c_core cdrom 
> parport_pc lp parport ext3 jbd sg sym53c8xx scsi_transport_spi edd fan 
> thermal processor piix sd_mod scsi_mod ide_disk ide_core
> Pid: 3134, comm: powersaved Not tainted #1

This looks old. The SP3 GM version is This release is 
definitely out of support :(.

After some searching I found the RPM. That's the SLES10 SP1 GM kernel version. 
I don't think anyone ever tested that one on kvm.

> RIP: 0010:[<ffffffff802dabf1>] <ffffffff802dabf1>{paranoid_restore+81}

Yeah, great. That one's not helpful at all:

0xffffffff802dabf1 <paranoid_restore+81>:       iretq  

> RSP: 0000:ffffffff8041afd8  EFLAGS: 00010086
> RAX: ffffffff88021d50 RBX: ffffffff88021e18 RCX: 00000000b4c562b6
> RDX: 00000000000001f7 RSI: ffffffff88021e18 RDI: 00000000000001f7
> RBP: 0000000000000000 R08: 00000000000004e2 R09: ffffffff80417d60
> R10: 000000000000001f R11: ffffffff8800752c R12: ffffffff88021d00
> R13: 00000000000004e2 R14: ffffffff80417dac R15: 0000000000000040
> FS:  00002ae1d26ee760(0000) GS:ffffffff803be000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> CR2: 0000000000555b30 CR3: 0000000210fe9000 CR4: 00000000000006e0
> Process powersaved (pid: 3134, threadinfo ffff810210ff2000, task 
> ffff810211f83850)
> Stack: ffffffff802dabf1 0000000000000010 0000000000010086 ffffffff8041afd8
>      0000000000000000 0000000000000000 0000000000000000 0000000000000000
>      0000000000000000 0000000000000000
> Call Trace: <NMI> <ffffffff802dabf1>{paranoid_restore+81} <EOE>
>      <ffffffff802dabf1>{paranoid_restore+81}
> Code: 48 cf 65 48 8b 0c 25 10 00 00 00 48 81 e9 d8 1f 00 00 8b 59
> console shuts up ...
> <0>Kernel panic - not syncing: Aiee, killing interrupt handler!

Please try out different values for -cpu. I think powersaved gets confused by 
the invalid CPU type we're emulating.


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