Problem with dom0_mem=6144M

Problem with dom0_mem=6144M

[Roberto Scudeller]

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Hi all,

I try to set dom0_mem=6144M in my xen 4.0.2-rc1-pre with pv_ops kernel
2.6.32.24 (jeremy source) but after boot my dom0 appear in "free -m" 5408M.

My logs:
# xm info|grep memory
total_memory           : 32755
free_memory            : 27658

My free -m:
# free -m
             total       used       free     shared    buffers     cached
Mem:          5408       2060       3347          0         17        133

In my menu.lst:
title KERNEL-XEN
    root(hd0,0)
    kernel /xen.gz dom0_mem=6144M
    module /vmlinuz-2.6.32.24 ro nomodeset root=/dev/VolGroup00/LogVol00
    module /initrd-2.6.32.24.img

In compilation I set this:
CONFIG_XEN_MAX_DOMAIN_MEMORY=128


Could anyone help me? Anyone experienced this?

Thank you for any help.

-- 
Roberto Scudeller

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Re: Problem with dom0_mem=6144M

[Steven Timm]

I have always used syntax

dom0_mem=6144000

And that works for me.
I have never tried to use the M and not sure what it would do.
The default units are KB.  the only thing that I have seen
that gives you less memory in dom0 than what you expected is if
you make too many domU's and xen takes the memory out of dom0's hide.

Steve Timm


On Fri, 21 Jan 2011, Roberto Scudeller wrote:

> Hi all,
>
> I try to set dom0_mem=6144M in my xen 4.0.2-rc1-pre with pv_ops kernel
> 2.6.32.24 (jeremy source) but after boot my dom0 appear in "free -m" 5408M.
>
> My logs:
> # xm info|grep memory
> total_memory           : 32755
> free_memory            : 27658
>
> My free -m:
> # free -m
>             total       used       free     shared    buffers     cached
> Mem:          5408       2060       3347          0         17        133
>
> In my menu.lst:
> title KERNEL-XEN
>    root(hd0,0)
>    kernel /xen.gz dom0_mem=6144M
>    module /vmlinuz-2.6.32.24 ro nomodeset root=/dev/VolGroup00/LogVol00
>    module /initrd-2.6.32.24.img
>
> In compilation I set this:
> CONFIG_XEN_MAX_DOMAIN_MEMORY=128
>
>
> Could anyone help me? Anyone experienced this?
>
> Thank you for any help.
>
>

-- 
------------------------------------------------------------------
Steven C. Timm, Ph.D  (630) 840-8525
timm@fnal.gov  http://home.fnal.gov/~timm/
Fermilab Computing Division, Scientific Computing Facilities,
Grid Facilities Department, FermiGrid Services Group, Group Leader.
Lead of FermiCloud project.

Re: [Xen-users] Problem with dom0_mem=6144M

[Roberto Scudeller]

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Dear Steven,

Thanks for help.

I try dom0_mem=6144000 and my dom0 continues with (free -m 5264; xm info
4953).

In boot dom0, I dont start any domU's.

Any idea?

Thanks for all.




2011/1/21 Steven Timm <timm@fnal.gov>

> I have always used syntax
>
> dom0_mem=6144000
>
> And that works for me.
> I have never tried to use the M and not sure what it would do.
> The default units are KB.  the only thing that I have seen
> that gives you less memory in dom0 than what you expected is if
> you make too many domU's and xen takes the memory out of dom0's hide.
>
> Steve Timm
>
>
>
> On Fri, 21 Jan 2011, Roberto Scudeller wrote:
>
>  Hi all,
>>
>> I try to set dom0_mem=6144M in my xen 4.0.2-rc1-pre with pv_ops kernel
>> 2.6.32.24 (jeremy source) but after boot my dom0 appear in "free -m"
>> 5408M.
>>
>> My logs:
>> # xm info|grep memory
>> total_memory           : 32755
>> free_memory            : 27658
>>
>> My free -m:
>> # free -m
>>            total       used       free     shared    buffers     cached
>> Mem:          5408       2060       3347          0         17        133
>>
>> In my menu.lst:
>> title KERNEL-XEN
>>   root(hd0,0)
>>   kernel /xen.gz dom0_mem=6144M
>>   module /vmlinuz-2.6.32.24 ro nomodeset root=/dev/VolGroup00/LogVol00
>>   module /initrd-2.6.32.24.img
>>
>> In compilation I set this:
>> CONFIG_XEN_MAX_DOMAIN_MEMORY=128
>>
>>
>> Could anyone help me? Anyone experienced this?
>>
>> Thank you for any help.
>>
>>
>>
> --
> ------------------------------------------------------------------
> Steven C. Timm, Ph.D  (630) 840-8525
> timm@fnal.gov  http://home.fnal.gov/~timm/ <http://home.fnal.gov/%7Etimm/>
> Fermilab Computing Division, Scientific Computing Facilities,
> Grid Facilities Department, FermiGrid Services Group, Group Leader.
> Lead of FermiCloud project.
>



-- 
Roberto Scudeller
Especialista Linux/Unix

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