Re: [Xen-API] XCP 1.5: Physical memory not showing up - Solved

[JÃhann Fannberg <johannf@xxxxxxxxxx>]

Found the problem:

xe host-dmesg shows:

(XEN) Command line: iommu=verbose loglvl=all mem=1024M dom0_max_vcpus=4 
dom0_mem=752M lowmem_emergency_pool=1M crashkernel=64M@32M console= 
vga=mode-0x0311

So this is a boot (kernel) command line option. Had a difficult time finding 
where it is set, finally came to /boot/extlinux.conf. 

Where is this documented? Spent a good time searching for this on the web, 
found detailed reference for the boot command options - but none info on  where 
to enter them. Finally found the file when poking around on the machine. Having 
the file name I could find others on the internet having had similar problems. 

IMHO, this should be a part of the standard documentation for Xen/XCP - where 
to change the hypervisor boot-options - and easily searchable as well.


Thanks anyhow, 

Johann. 


----- Upprunaleg skilaboà -----
FrÃ: "JÃhann Fannberg" <johannf@xxxxxxxxxx>
Til: xen-api@xxxxxxxxxxxxx
Sent: MÃnudagur, 19. NÃvember, 2012 14:17:09
Efni: XCP 1.5: Physical memory not showing up

My 24GB i7 shows only 1 GB in xentop and trying to start vm:s (with 4GB memory 
requirements) gives "Cannot start here [Not enough free memory]".

dmidecode shows all 6 4GB memory modules - 8bit parity. 

xe host-dmesg shows:

...
(XEN) mcheck_poll: Machine check polling timer started.
(XEN) *** LOADING DOMAIN 0 ***
(XEN)  Xen  kernel: 64-bit, lsb, compat32
(XEN)  Dom0 kernel: 32-bit, PAE, lsb, paddr 0x100000 -> 0x5f5000
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN)  Dom0 alloc.:   000000003d000000->000000003e000000 (186617 pages to be 
allocated)
(XEN)  Init. ramdisk: 000000003f4f9000->000000003fbff800
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN)  Loaded kernel: 00000000c0100000->00000000c05f5000
(XEN)  Init. ramdisk: 00000000c05f5000->00000000c0cfb800
(XEN)  Phys-Mach map: 00000000c0cfc000->00000000c0db8000
(XEN)  Start info:    00000000c0db8000->00000000c0db84b4
(XEN)  Page tables:   00000000c0db9000->00000000c0dc7000
(XEN)  Boot stack:    00000000c0dc7000->00000000c0dc8000
(XEN)  TOTAL:         00000000c0000000->00000000c1000000
(XEN)  ENTRY ADDRESS: 00000000c0100000
...

Kind regards, 

Johann A. Fannberg.

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