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RE: [Xen-devel] Some issues in recent ChangeSet.

To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>, "Steven Hand" <Steven.Hand@xxxxxxxxxxxx>
Subject: RE: [Xen-devel] Some issues in recent ChangeSet.
From: "Zheng, Jeff" <jeff.zheng@xxxxxxxxx>
Date: Fri, 25 Aug 2006 23:15:13 +0800
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Thread-topic: [Xen-devel] Some issues in recent ChangeSet.
Yes. LTP math issue & "kerne panic - not sync" issue resolved.

Resolved issues contain:
32bit HV/xen0:
2. 4 LTP math cases(float_bessel, float_exp_log, float_power and
   float_trigo) sometime fail. (775)
3. Kernel build in VMX may meet kernel panic. It complains like: "<0>
   Kernel panic - not syncing: kernel/sched.c:460:
   spin_lock(kernel/sched.c:c03ea120) already locked by
IA32E HV/xen0
8. 64bit SMP VMX can not be up, if acpi=0 : If try with acpi=0 apic=1
   vcpus=2 pae=1 to create FC3 IA32e guest, Guest will kernel panic when

But following issues still exist:
1. Reboot fail in Guest OS: Reboot in guest will close current qemu
   windows but does not create a new qemu window to restart

32bit PAE HV/xen0:
4. Cannot bootup pae SMP VMX domain.  guest crashed with attached
5. Create 32 guest with balloon driver will hang xen0: If I do not set
   a fixed size memory using "dom0_mem=" option in grub.conf for dom0,
   dom0 will hang after a vmx guest is created.
6. 32 SMP Guest only see about 900M memory when assign 1.5G memory for
   the guest: If I assign 1.5G memory in vmx config file and boot up the
   guest, I still can only see 903256KB memory using "cat /proc/meminfo"
   in the guest, though I can see 1.5G memory allocated to the guest.

IA32E HV/xen0
7. 64bit guest shows io-specific performance improvement but cpu-specific
    performance downgrad 
9. FC5 IA32 VMX Guest crash when try to boot SMP Guest: set vcpus=2
   acpi=1 apic=1 pae=1 in configure file and create SMP FC5 IA32 VMX
   guest, guest wil crash with attached output.
10. 32pae SMP guest with 1500MB memory will cause xen0 reboot
11. Bootup 64bit guest with pae=0 in configure file, guest will
   complain "Your CPU does not support long mode"


>-----Original Message-----
>From: Keir Fraser [mailto:Keir.Fraser@xxxxxxxxxxxx] 
>Sent: 2006年8月24日 16:53
>To: Keir Fraser; Zheng, Jeff; Steven Hand
>Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
>Subject: Re: [Xen-devel] Some issues in recent ChangeSet.
>On 24/8/06 8:20 am, "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx> wrote:
>>> No. The issue still exists. We also found that "kernel 
>panic - not sync:
>>> kernel/sched.c" issue in kernel build at CS11246.
>> Ok, I see why the 'better' patch 11243 doesn't in fact work. 
>It's good to
>> hear that 11242 worked okay for you though. We'll sort out a 
>real, final,
>> proper fix today!
>Hopefully 11249:1ff4cc298bec is a final solution to this issue.
> -- Keir

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