Mailing List Archive: Xen: API

CentOS 6.X balloon issue [ XCP 1.5 / CentOS6 Bug ]

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torushikeshj at gmail

Mar 24, 2012, 6:06 AM

Post #1 of 4 (372 views)
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CentOS 6.X balloon issue [ XCP 1.5 / CentOS6 Bug ]

Hello List,

On XCP1.5 ballooning of CentOS6.X does not work correctly.
The DomU can be ballooned up only till its start_target_mem and seems to
disobey the static max.

For e.g If I start a CentOS6 DomU with 4GB RAM then ballooning works fine
between 256MB to 4GB but it cant go beyond 4GB though it has static max as
16GB.

I can confirm same issue on XCP1.1, so it might be something only with
CentOS6.

- RJ

george.shuklin at gmail

Mar 25, 2012, 5:05 AM

Post #2 of 4 (352 views)
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Re: CentOS 6.X balloon issue [ XCP 1.5 / CentOS6 Bug ] [In reply to]

Heh, I've reported that stuff many times, until it was fixed in recent
kernels (about 3.1 or 3.2).

No luck for 2.6.32. All older pv_ops kernels do have that issue with XCP
toolstack. Use -xen kernels (like 2.6.18-xen, or forward ported from
suse f.e. 2.6.34-xen, 2.6.37-xen, 3.1-xen and so on).

On 24.03.2012 17:06, R J wrote:
> Hello List,
>
> On XCP1.5 ballooning of CentOS6.X does not work correctly.
> The DomU can be ballooned up only till its start_target_mem and seems
> to disobey the static max.
>
> For e.g If I start a CentOS6 DomU with 4GB RAM then ballooning works
> fine between 256MB to 4GB but it cant go beyond 4GB though it has
> static max as 16GB.
>
> I can confirm same issue on XCP1.1, so it might be something only with
> CentOS6.
>
> - RJ
>
>
> _______________________________________________
> xen-api mailing list
> xen-api [at] lists
> http://lists.xen.org/cgi-bin/mailman/listinfo/xen-api

torushikeshj at gmail

Mar 25, 2012, 11:56 PM

Post #3 of 4 (353 views)
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Re: CentOS 6.X balloon issue [ XCP 1.5 / CentOS6 Bug ] [In reply to]

On Sun, Mar 25, 2012 at 5:35 PM, George Shuklin <george.shuklin [at] gmail>wrote:

> Heh, I've reported that stuff many times, until it was fixed in recent
> kernels (about 3.1 or 3.2).
>
> No luck for 2.6.32. All older pv_ops kernels do have that issue with XCP
> toolstack. Use -xen kernels (like 2.6.18-xen, or forward ported from suse
> f.e. 2.6.34-xen, 2.6.37-xen, 3.1-xen and so on).
>
>
>
Oh ! Do you have any URL so that I can track for this bug update ?
And till the time this BUG gets resolved, how do I obtain a 2.6.32-xen ?

I'm little familiar with Kernel Compilations but not too much. I would
appreciate if you can guide me.

>
> On 24.03.2012 17:06, R J wrote:
>
> Hello List,
>
> On XCP1.5 ballooning of CentOS6.X does not work correctly.
> The DomU can be ballooned up only till its start_target_mem and seems to
> disobey the static max.
>
> For e.g If I start a CentOS6 DomU with 4GB RAM then ballooning works fine
> between 256MB to 4GB but it cant go beyond 4GB though it has static max as
> 16GB.
>
> I can confirm same issue on XCP1.1, so it might be something only with
> CentOS6.
>
> - RJ
>
>
> _______________________________________________
> xen-api mailing listxen-api [at] listshttp://lists.xen.org/cgi-bin/mailman/listinfo/xen-api
>
>
> _______________________________________________
> xen-api mailing list
> xen-api [at] lists
> http://lists.xen.org/cgi-bin/mailman/listinfo/xen-api
>
>

george.shuklin at gmail

Mar 26, 2012, 5:28 AM

Post #4 of 4 (358 views)
Permalink

Re: CentOS 6.X balloon issue [ XCP 1.5 / CentOS6 Bug ] [In reply to]

1) commit d7587810a40aee32ec6bdfc2d4bce7ba9fd03c3e in linux tree.
2) I don't think it's good idea to change kernel of CentOS: it contains
lot of changes compare to vanilla
3) Actually, this is reason why we don't provide customers CentOS 6 in
cloud. All other operating systems (including centos 5) works with -xen
kernels or have it in distribution.

26.03.2012 10:56, R J wrote:
>
>
> On Sun, Mar 25, 2012 at 5:35 PM, George Shuklin
> <george.shuklin [at] gmail <mailto:george.shuklin [at] gmail>> wrote:
>
> Heh, I've reported that stuff many times, until it was fixed in
> recent kernels (about 3.1 or 3.2).
>
> No luck for 2.6.32. All older pv_ops kernels do have that issue
> with XCP toolstack. Use -xen kernels (like 2.6.18-xen, or forward
> ported from suse f.e. 2.6.34-xen, 2.6.37-xen, 3.1-xen and so on).
>
>
>
> Oh ! Do you have any URL so that I can track for this bug update ?
> And till the time this BUG gets resolved, how do I obtain a 2.6.32-xen ?
>
> I'm little familiar with Kernel Compilations but not too much. I would
> appreciate if you can guide me.
>
>
>
> On 24.03.2012 17:06, R J wrote:
>> Hello List,
>>
>> On XCP1.5 ballooning of CentOS6.X does not work correctly.
>> The DomU can be ballooned up only till its start_target_mem and
>> seems to disobey the static max.
>>
>> For e.g If I start a CentOS6 DomU with 4GB RAM then ballooning
>> works fine between 256MB to 4GB but it cant go beyond 4GB though
>> it has static max as 16GB.
>>
>> I can confirm same issue on XCP1.1, so it might be something only
>> with CentOS6.
>>
>> - RJ
>>
>>
>> _______________________________________________
>> xen-api mailing list
>> xen-api [at] lists <mailto:xen-api [at] lists>
>> http://lists.xen.org/cgi-bin/mailman/listinfo/xen-api
>
> _______________________________________________
> xen-api mailing list
> xen-api [at] lists <mailto:xen-api [at] lists>
> http://lists.xen.org/cgi-bin/mailman/listinfo/xen-api
>
>

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