Re: Balloon down memory failed in x86 PAE mode when memory size>4G

[ANNIE LI <annie.li@oracle.com>]

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My xen version is Xen3.4.0, and i use el5u2 pvhvm to have test.
The memory size is 6114.  "xm info" dose not show any change on 
free_memory after command "xm mem-set domid 4096". It seems free_memory 
will change after i set memory size less than 3083M,  such as: free 
memory will increase 1 after command "xm mem-set domid 3082".

The vm configure file is following:

name = "OVM_EL5U2_X86_PVHVM_4GB"
builder = "hvm"
memory = "6114"
disk = [ 
'file:/mnt/running_pool/OVM_EL5U2_X86_PVHVM_4GB/System.img,hda,w', ]
vif = [ 'type=netfront', ]
device_model = "/usr/lib/xen/bin/qemu-dm"
kernel = "/usr/lib/xen/boot/hvmloader"
vnc=1
vncunused=1
vnclisten = '0.0.0.0'
timer_mode=0
apic=1
acpi=1
pae=1
vcpus=1
serial = "pty" # enable serial console
on_reboot   = 'restart'
on_crash    = 'restart'

Thanks
Annie.

Keir Fraser wrote:
> We'd expect it to work. Please provide more details.
>
>  -- Keir
>
> On 21/09/2009 07:42, "ANNIE LI" <annie.li@oracle.com> wrote:
>
>   
>> Hi
>>
>> I implemented balloon in windows pv driver, it works normally on x86 and
>> x64 OS.
>> However, i hit problem to balloon down memory on x86 PAE mode VM when
>> it's memory
>> size is larger than 4G.
>>
>> Furthermore, i tested linux PVHVM too. Balloon driver also failed to
>> take effect
>> at the same situation.
>>
>> So, is there anything missed in windows or linux PV driver when
>> ballooning down
>> memory on x86 PAE VM(memory>4G)? or is there a limitation in Xen for PAE
>> mode?
>>
>> Thanks
>> Annie.
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@lists.xensource.com
>> http://lists.xensource.com/xen-devel
>>     
>
>
>
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>   

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