Re: [Xen-devel] Scrubbing free ram

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Thu, Apr 29, 2010 at 04:39:45PM +0800, Bei Guan wrote:
> Dear Keir,
> 
> I've got the boot message of Xen4.0 on fedora11. It is as following.
> _  __            _  _    ___   ___
>  \ \/ /___ _ __   | || |  / _ \ / _ \
>   \  // _ \ '_ \  | || |_| | | | | | |
>   /  \  __/ | | | |__   _| |_| | |_| |
>  /_/\_\___|_| |_|    |_|(_)___(_)___/
> 
> (XEN) Xen version 4.0.0 (root@) (gcc çæ 4.4.1 20090725 (Red Hat 4.4.1-2)
> (GCC) ) Thu Apr 29 09:41:18 CST 2010
> (XEN) Latest ChangeSet: unavailable
> (XEN) Command line: console=com1,vga com1=9600,8n1
> (XEN) Video information:
> (XEN)  VGA is text mode 80x25, font 8x16
> (XEN)  VBE/DDC methods: V2; EDID transfer time: 1 seconds
> (XEN) Disc information:
> (XEN)  Found 1 MBR signatures
> (XEN)  Found 1 EDD information structures
> (XEN) Xen-e820 RAM map:
> (XEN)  0000000000000000 - 000000000009a800 (usable)
> (XEN)  00000000000f0000 - 0000000000100000 (reserved)
> (XEN)  0000000000100000 - 00000000cfdffc00 (usable)
> (XEN)  00000000cfdffc00 - 00000000cfe53c00 (ACPI NVS)
> (XEN)  00000000cfe53c00 - 00000000cfe55c00 (ACPI data)
> (XEN)  00000000cfe55c00 - 00000000d0000000 (reserved)
> (XEN)  00000000e0000000 - 00000000f0000000 (reserved)
> (XEN)  00000000fec00000 - 00000000fed00400 (reserved)
> (XEN)  00000000fed20000 - 00000000feda0000 (reserved)
> (XEN)  00000000fee00000 - 00000000fef00000 (reserved)
> (XEN)  00000000ffb00000 - 0000000100000000 (reserved)
> (XEN)  0000000100000000 - 0000000128000000 (usable)
> (XEN) System RAM: 3936MB (4031228kB)
> (XEN) ACPI: RSDP 000FEC00, 0024 (r2 DELL  )
> (XEN) ACPI: XSDT 000FC7CB, 009C (r1 DELL    B10K          15 ASL        61)
> (XEN) ACPI: FACP 000FC8FB, 00F4 (r3 DELL    B10K          15 ASL        61)
> (XEN) ACPI: DSDT FFE9CFF8, 54AD (r1   DELL    dt_ex     1000 INTL 20050624)
> (XEN) ACPI: FACS CFDFFC00, 0040
> (XEN) ACPI: SSDT FFEA25C4, 00AA (r1   DELL    st_ex     1000 INTL 20050624)
> (XEN) ACPI: APIC 000FC9EF, 0092 (r1 DELL    B10K          15 ASL        61)
> (XEN) ACPI: BOOT 000FCA81, 0028 (r1 DELL    B10K          15 ASL        61)
> (XEN) ACPI: ASF! 000FCAA9, 0096 (r32 DELL    B10K          15 ASL        61)
> (XEN) ACPI: MCFG 000FCB3F, 003E (r1 DELL    B10K          15 ASL        61)
> (XEN) ACPI: HPET 000FCB7D, 0038 (r1 DELL    B10K          15 ASL        61)
> (XEN) ACPI: TCPA 000FCDD9, 0032 (r1 DELL    B10K          15 ASL        61)
> (XEN) ACPI: DMAR 000FCE0B, 00D8 (r1 DELL    B10K          15 ASL        61)
> (XEN) ACPI: SLIC 000FCBB5, 0176 (r1 DELL    B10K          15 ASL        61)
> (XEN) ACPI: SSDT CFDFFC40, 01B7 (r1 DpgPmm  Cpu0Ist       11 INTL 20050624)
> (XEN) ACPI: SSDT CFE00049, 01B7 (r1 DpgPmm  Cpu1Ist       11 INTL 20050624)
> (XEN) ACPI: SSDT CFE00452, 01B7 (r1 DpgPmm  Cpu2Ist       11 INTL 20050624)
> (XEN) ACPI: SSDT CFE0085B, 01B7 (r1 DpgPmm  Cpu3Ist       11 INTL 20050624)
> (XEN) ACPI: SSDT CFE00C64, 0190 (r1 DpgPmm    CpuPm       10 INTL 20050624)
> (XEN) Xen heap: 8MB (8852kB)
> (XEN) Domain heap initialised
> (XEN) Processor #0 7:7 APIC version 20
> (XEN) Processor #1 7:7 APIC version 20
> (XEN) Processor #2 7:7 APIC version 20
> (XEN) Processor #3 7:7 APIC version 20
> (XEN) IOAPIC[0]: apic_id 8, version 32, address 0xfec00000, GSI 0-23
> (XEN) Enabling APIC mode:  Flat.  Using 1 I/O APICs
> (XEN) Using scheduler: SMP Credit Scheduler (credit)
> (XEN) Detected 2660.072 MHz processor.
> (XEN) Initing memory sharing.
> (XEN) VMX: Supported advanced features:
> (XEN)  - APIC MMIO access virtualisation
> (XEN)  - APIC TPR shadow
> (XEN)  - Virtual NMI
> (XEN)  - MSR direct-access bitmap
> (XEN) HVM: ASIDs disabled.
> (XEN) HVM: VMX enabled
> (XEN) xsave_init: cpu0: cntxt_max_size: 0x240 and states: 00000000:00000003
> (XEN) xsave_init: using cntxt_size: 0x240 and states: 00000000:00000003
> (XEN) Intel VT-d Snoop Control not supported.
> (XEN) Intel VT-d DMA Passthrough not supported.
> (XEN) Intel VT-d Queued Invalidation not supported.
> (XEN) Intel VT-d Interrupt Remapping not supported.
> (XEN) I/O virtualisation enabled
> (XEN) I/O virtualisation for PV guests disabled
> (XEN) xsave_init: cpu1: cntxt_max_size: 0x240 and states: 00000000:00000003
> (XEN) xsave_init: cpu2: cntxt_max_size: 0x240 and states: 00000000:00000003
> (XEN) xsave_init: cpu3: cntxt_max_size: 0x240 and states: 00000000:00000003
> (XEN) Total of 4 processors activated.
> (XEN) ENABLING IO-APIC IRQs
> (XEN)  -> Using new ACK method
> (XEN) checking TSC synchronization across 4 CPUs: passed.
> (XEN) Platform timer is 14.318MHz HPET
> (XEN) Brought up 4 CPUs
> (XEN) *** LOADING DOMAIN 0 ***
> (XEN)  Xen  kernel: 32-bit, PAE, lsb
> (XEN)  Dom0 kernel: 32-bit, PAE, lsb, paddr 0x400000 -> 0xbfb000
> (XEN) PHYSICAL MEMORY ARRANGEMENT:
> (XEN)  Dom0 alloc.:   000000003c000000->000000003e000000 (960235 pages to be
> allocated)
> (XEN) VIRTUAL MEMORY ARRANGEMENT:
> (XEN)  Loaded kernel: c0400000->c0bfb000
> (XEN)  Init. ramdisk: c0bfb000->c1329e00
> (XEN)  Phys-Mach map: c132a000->c16dbbac
> (XEN)  Start info:    c16dc000->c16dc47c
> (XEN)  Page tables:   c16dd000->c16ee000
> (XEN)  Boot stack:    c16ee000->c16ef000
> (XEN)  TOTAL:         c0000000->c1800000
> (XEN)  ENTRY ADDRESS: c098d000
> (XEN) Dom0 has maximum 4 VCPUs
> (XEN) Scrubbing Free RAM: .done.
> (XEN) Xen trace buffers: disabled
> (XEN) Std. Loglevel: Errors and warnings
> (XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
> (XEN) Xen is relinquishing VGA console.
> (XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to
> Xen)
> (XEN) Freed 136kB init memory.
> mapping kernel into physical memory
> about to get started...
> (XEN) traps.c:2309:d0 Domain attempted WRMSR 000002ff from 00000000:00000c06
> to 00000000:00000000.
> (XEN) traps.c:2309:d0 Domain attempted WRMSR 00000277 from 00000501:00070406
> to 00070106:00070106.
> 
> 
> My grub.conf is:
> 
> title Xen(2.6.31.13)
>     root (hd0,10)
>     kernel /boot/xen.gz console=com1,vga com1=9600,8n1
>     module /boot/vmlinuz-2.6.31.13 root=/dev/sda1 ro nomodeset

Was this kernel boot line the same as the previous kernel you used?
Also, please consult the http://wiki.xensource.com/xenwiki/XenParavirtOps
which Pasi refered to you earlier, and look in the "Are there more debugging
options I could enable to troubleshoot booting problems?"

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