[Xen-bugs] [Bug 665] New: (XEN) Couldn't alloc shadow page! dom1 count=956

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=665

           Summary: (XEN) Couldn't alloc shadow page! dom1 count=956
           Product: Xen
           Version: unstable
          Platform: x86-64
        OS/Version: Linux-2.6
            Status: NEW
          Severity: critical
          Priority: P2
         Component: HVM
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: esmith@xxxxxxxxxxxxxxx


I've seen this crash a couple of times running a RHEL4U2-32bit 1 CPU UP kernel
fully virtualized guest on a XEN 64bit 1CPU (nosmp) hypervisor.

Test Configuration:
Dell Precision WorkStation 380, Dual Core, 2GB, 3 SATA (Intel VT)
64bit XEN Hypervisor on a RHEL4U2 64bit root (/dev/sda)
32bit fully virtualized (HVM) guest RHEL4U2 256MB (/dev/sdb)
      pae=1, acpi=1, apic=1

XEN Console:
Red Hat Enterprise Linux ES release 4 (Nahant Update 2)
Kernel 2.6.16.13-xen on an x86_64

tst110 login: root
Password:
Last login: Tue May 30 07:40:23 on ttyS0
You have new mail.
[root@tst110 ~]# /etc/init.d/xend start
Bridge firewalling registered
ip_tables: (C) 2000-2006 Netfilter Core Team
[root@tst110 ~]# xm info
host                   : tst110
release                : 2.6.16.13-xen
version                : #1 SMP Sat May 27 01:40:11 EDT 2006
machine                : x86_64
nr_cpus                : 1
nr_nodes               : 1
sockets_per_node       : 1
cores_per_socket       : 1
threads_per_core       : 1
cpu_mhz                : 2793
hw_caps                :
bfebfbff:20100800:00000000:00000180:0000e43d:00000000:00000001
total_memory           : 1023
free_memory            : 68
xen_major              : 3
xen_minor              : 0
xen_extra              : -unstable
xen_caps               : xen-3.0-x86_64 hvm-3.0-x86_32 hvm-3.0-x86_32p
hvm-3.0-x86_64
platform_params        : virt_start=0xffff800000000000
xen_changeset          : Fri May 26 17:22:30 2006 +0100 10173:954f4dea9da6
cc_compiler            : gcc version 4.0.0 20050519 (Red Hat 4.0.0-8)
cc_compile_by          : build
cc_compile_domain      : katana-technology.com
cc_compile_date        : Sat May 27 00:48:47 EDT 2006
[root@tst110 ~]# ip_tables: (C) 2000-2006 Netfilter Core Team
(XEN) (GUEST: 1) HVM Loader
(XEN) (GUEST: 1) Loading ROMBIOS ...
(XEN) (GUEST: 1) Loading Cirrus VGABIOS ...
(XEN) (GUEST: 1) Loading ACPI ...
(XEN) (GUEST: 1) Loading VMXAssist ...
(XEN) (GUEST: 1) VMX go ...
(XEN) (GUEST: 1) VMXAssist (May 27 2006)
(XEN) (GUEST: 1) Memory size 256 MB
(XEN) (GUEST: 1) E820 map:
(XEN) (GUEST: 1) 0000000000000000 - 000000000009F800 (RAM)
(XEN) (GUEST: 1) 000000000009F800 - 00000000000A0000 (Reserved)
(XEN) (GUEST: 1) 00000000000A0000 - 00000000000C0000 (Type 16)
(XEN) (GUEST: 1) 00000000000F0000 - 0000000000100000 (Reserved)
(XEN) (GUEST: 1) 0000000000100000 - 000000000FFFE000 (RAM)
(XEN) (GUEST: 1) 000000000FFFE000 - 000000000FFFF000 (Type 18)
(XEN) (GUEST: 1) 000000000FFFF000 - 0000000010000000 (Type 17)
(XEN) (GUEST: 1) 0000000010000000 - 0000000010003000 (ACPI NVS)
(XEN) (GUEST: 1) 0000000010003000 - 000000001000D000 (ACPI Data)
(XEN) (GUEST: 1) 00000000FEC00000 - 0000000100000000 (Type 16)
(XEN) (GUEST: 1)
(XEN) (GUEST: 1) Start BIOS ...
(XEN) (GUEST: 1) Starting emulated 16-bit real-mode: ip=F000:FFF0
(XEN) (GUEST: 1)  rombios.c,v 1.138 2005/05/07 15:55:26 vruppert Exp $
(XEN) (GUEST: 1) Remapping master: ICW2 0x8 -> 0x20
(XEN) (GUEST: 1) Remapping slave: ICW2 0x70 -> 0x28
(XEN) (GUEST: 1) VGABios $Id: vgabios.c,v 1.61 2005/05/24 16:50:50 vruppert Exp
$
(XEN) (GUEST: 1) HVMAssist BIOS, 8 cpus, $Revision: 1.138 $ $Date: 2005/05/07
15:55:26 $
(XEN) (GUEST: 1)
(XEN) (GUEST: 1) ata0-0: PCHS=16383/16/63 translation=lba LCHS=1024/255/63
(XEN) (GUEST: 1) ata0 master: QEMU HARDDISK ATA-2 Hard-Disk (10757 MBytes)
(XEN) (GUEST: 1) ata0  slave: Unknown device
(XEN) (GUEST: 1)
(XEN) (GUEST: 1) Booting from Hard Disk...
(XEN) (GUEST: 1) int13_harddisk: function 41, unmapped device for ELDL=81
(XEN) (GUEST: 1) int13_harddisk: function 08, unmapped device for ELDL=81
(XEN) (GUEST: 1) *** int 15h function AX=00C0, BX=0000 not yet supported!
(XEN) (GUEST: 1) int13_harddisk: function 15, unmapped device for ELDL=81
(XEN) (GUEST: 1) KBD: unsupported int 16h function 03
(XEN) (GUEST: 1) int13_harddisk: function 15, unmapped device for ELDL=81
(XEN) (GUEST: 1) *** int 15h function AX=E980, BX=E6F5 not yet supported!
(XEN) (GUEST: 1) int13_harddisk: function 02, unmapped device for ELDL=81
(XEN) (GUEST: 1) int13_harddisk: function 41, unmapped device for ELDL=81
(XEN) Couldn't alloc shadow page! dom1 count=956
(XEN) Shadow table counts: l1=0 l2=0 hl2=0 snapshot=0
(XEN) domain_crash_sync called from shadow.c:434
(XEN) Domain 1 (vcpu#0) crashed on cpu#0:
(XEN) ----[ Xen-3.0-unstable    Not tainted ]----
(XEN) CPU:    0
(XEN) RIP:    0060:[<00000000c01e5ccd>]
(XEN) RFLAGS: 0000000000010207   CONTEXT: hvm
(XEN) rax: 0000000009e24963   rbx: 0000000000000000   rcx: 0000000009e24960
(XEN) rdx: 00000000cb4a6000   rsi: 0000000000007fff   rdi: 00000000c13c5748
(XEN) rbp: 00000000cb718000   rsp: 00000000cb4a6f80   r8:  0000000000000000
(XEN) r9:  0000000000000000   r10: 0000000000000000   r11: 0000000000000000
(XEN) r12: 0000000000000000   r13: 0000000000000000   r14: 0000000000000000
(XEN) r15: 0000000000000000   cr0: 000000008005003b   cr3: 000000001000f000
(XEN) ds: 007b   es: 007b   fs: 0000   gs: 0000   ss: 0068   cs: 0060


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