[Xen-users] crashkernel doesn't work with linux-2.6.32-dom0

[Eric Camachat <eric.camachat@xxxxxxxxx>]

Hi,

I followed xen-4.1.2/docs/misc/kexec_and_kdump.txt, but I cannot see
"Crash kernel" in /dev/iomem.
Is this a known issue?

$ grep -E 'CONFIG_PROC_VMCORE|CONFIG_KEXEC|CONFIG_CRASH_DUMP'
linux-2.6.32.24/.config
CONFIG_KEXEC=y
CONFIG_CRASH_DUMP=y
CONFIG_PROC_VMCORE=y

/root # xm info
host                   : kdump-testing
release                : 2.6.32.24-dom0
version                : #1 SMP PREEMPT Fri Feb 10 14:46:15 PST 2012
machine                : x86_64
nr_cpus                : 4
nr_nodes               : 1
cores_per_socket       : 4
threads_per_core       : 1
cpu_mhz                : 2666
hw_caps                :
bfebfbff:28100800:00000000:00003b40:0098e3fd:00000000:00000001:00000000
virt_caps              : hvm
total_memory           : 8151
free_memory            : 6915
free_cpus              : 0
xen_major              : 4
xen_minor              : 1
xen_extra              : .2
xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32
hvm-3.0-x86_32p hvm-3.0-x86_64
xen_scheduler          : credit
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          : unavailable
xen_commandline        : BOOT_IMAGE=linux-2.6.32-dom0 ro loglvl=all
guest_loglvl=all dom0_mem=1024M crashkernel=128M
cc_compiler            : collect2: ld returned 1 exit status
cc_compile_by          : eric
cc_compile_domain      : camachat
cc_compile_date        : Fri Feb 10 15:02:23 PST 2012
xend_config_format     : 4
/root # xm info|grep commandline
xen_commandline        : BOOT_IMAGE=linux-2.6.32-dom0 ro loglvl=all
guest_loglvl=all dom0_mem=1024M crashkernel=128M

/root # xm dmesg|grep Kdump
(XEN) Kdump: 128MB (131072kB) at 0x236dd0000

/root # cat /proc/cmdline
noinitrd root=/dev/sda8 ro console=ttyS0,19200

/root # cat /proc/iomem
00000000-0000ffff : reserved
00010000-0009a3ff : System RAM
0009a400-000fffff : reserved
00100000-3fffffff : System RAM
  01000000-01401a1f : Kernel code
  01401a20-0163653f : Kernel data
  016bc000-017309c3 : Kernel bss
bd780000-bd78dfff : ACPI Tables
bd78e000-bd7cffff : ACPI Non-volatile Storage
bd7d0000-bd7dffff : reserved
bd7ed000-bdffffff : reserved
e0000000-efffffff : PCI MMCONFIG 0 [00-ff]
  e0000000-efffffff : pnp 00:0c
fbec0000-fbedffff : 0000:00:19.0
  fbec0000-fbedffff : e1000e
fbef0000-fbef07ff : 0000:00:1f.2
  fbef0000-fbef07ff : ahci
fbef2000-fbef23ff : 0000:00:1d.0
  fbef2000-fbef23ff : ehci_hcd
fbef4000-fbef7fff : 0000:00:1b.0
fbef8000-fbef83ff : 0000:00:1a.0
  fbef8000-fbef83ff : ehci_hcd
fbefa000-fbefafff : 0000:00:19.0
  fbefa000-fbefafff : e1000e
fbefc000-fbefcfff : 0000:00:16.3
fbeff800-fbeff8ff : 0000:00:1f.3
fbeffc00-fbeffc0f : 0000:00:16.0
fbf00000-fbffffff : PCI Bus 0000:03
  fbfdc000-fbfdffff : 0000:03:00.0
    fbfdc000-fbfdffff : e1000e
  fbfe0000-fbffffff : 0000:03:00.0
    fbfe0000-fbffffff : e1000e
fc000000-fcffffff : pnp 00:01
fd000000-fdffffff : pnp 00:01
fe000000-febfffff : pnp 00:01
fec00000-fec00fff : IOAPIC 0
  fec00000-fec00fff : reserved
fed00000-fed003ff : HPET 0
fed14000-fed19fff : pnp 00:01
fed1c000-fed1ffff : pnp 00:08
fed20000-fed3ffff : pnp 00:08
fed40000-fed8ffff : pnp 00:08
fee00000-fee00fff : reserved
  fee00000-fee00fff : pnp 00:0a
ffa00000-ffffffff : reserved

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