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RE: [Xen-devel] credit scheduler issues in 64bit hypervisor

  • To: "Zheng, Jeff" <jeff.zheng@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Li, Xin B" <xin.b.li@xxxxxxxxx>
  • Date: Thu, 29 Jun 2006 19:46:57 +0800
  • Delivery-date: Thu, 29 Jun 2006 04:47:46 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcaaZIyrAjtKt/x+Rlq+SP2Ih+RjrAA+slbw
  • Thread-topic: [Xen-devel] credit scheduler issues in 64bit hypervisor

I'm using sedf scheduler with changeset 10520 on my VT machine which has 4 cpus.
I created a 4 vcpus SMP VMX guest and then a windows guest installer, I got:

(XEN) (GUEST: 14) ata0-0: PCHS=4063/16/63 translation=lba LCHS=1015/64/63
(XEN) (GUEST: 14) ata0 master: QEMU HARDDISK ATA-2 Hard-Disk (2000 MBytes)
(XEN) (GUEST: 14) ata0  slave: Unknown device
(XEN) (GUEST: 14) ata1 master: QEMU CD-ROM ATAPI-4 CD-Rom/DVD-Rom
(XEN) (GUEST: 14) ata1  slave: Unknown device
(XEN) (GUEST: 14) 
(XEN) (GUEST: 14) Booting from CD-Rom...
(XEN) (GUEST: 14) Invalid %cs=0x58 for protected mode
(XEN) (GUEST: 14) 
(XEN) (GUEST: 14) Halt called from %eip 0xD32DA 

But if I only create the windows guest, all is OK.
So seems we have bug if one physical cpu is used by 2 different VMX guest, I'm 
looking at it.


>-----Original Message-----
>From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
>[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Zheng, Jeff
>Sent: 2006年6月28日 11:40
>To: xen-devel@xxxxxxxxxxxxxxxxxxx
>Subject: [Xen-devel] credit scheduler issues in 64bit hypervisor 
>When we use credit scheduler in 64bit hypervisor, we see these issues:
>+ Booting 32bit VMX domain hangs at "ACPI: Unable to locate RSDP".
>+ Booting 32pae VMX domain will get a kernel panic.
>+ Booting indows SP1/SP2 Guest will crash guest OS.
>We don't see these issues with BVT scheduler.
>Xen-devel mailing list

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