Re: [pve-devel] VM config: User Interface <-> Online Help mismatch

[Waschbüsch IT-Services GmbH]

Hi Dietmar,

> Am 06.01.2017 um 12:39 schrieb Dietmar Maurer :
> 
>> The online help explains the ballooning feature quite nicely, but there is a
>> mismatch:
>> Under the 'Use fixed size memory' option, I can set the memory size and there
>> is a checkbox 'Ballooning'.
>> I find this confusing. If I set a fixed amount of memory, then that seems to
>> me to be mutually exclusive with 'Ballooning'.
> 
> The balloon driver is normally enabled, because it deliver some information
> about
> used memory (even if it does not manage memory). But some user
> reported kernel crashes with older kernels, so this option is there
> to disable the driver completely...

Thanks for the clarification!
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Re: [pve-devel] VM config: User Interface <-> Online Help mismatch

[Dietmar Maurer]

> The online help explains the ballooning feature quite nicely, but there is a
> mismatch:
> Under the 'Use fixed size memory' option, I can set the memory size and there
> is a checkbox 'Ballooning'.
> I find this confusing. If I set a fixed amount of memory, then that seems to
> me to be mutually exclusive with 'Ballooning'.

The balloon driver is normally enabled, because it deliver some information
about
used memory (even if it does not manage memory). But some user
reported kernel crashes with older kernels, so this option is there
to disable the driver completely...

> Also, the online help does not show this checkbox at all, so I wonder if this
> is a glitch in the UI and should be grouped differently? Or is the online help
> not up to date?

Sorry, this feature is quite new, and the online help is a few weeks behind...

> Most importantly, is my assumption right that Use fixed size memory and
> Ballooning are mutually exclusive?

no (that flag just disables/enable the driver).

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[pve-devel] VM config: User Interface <-> Online Help mismatch

[Waschbüsch IT-Services GmbH]

Hi all,

I just stumbled across the following:

When configuring memory for a VM, you can choose between the options 'Use fixed 
size memory' and 'Automatically allocate memory within this range'.
The online help explains the ballooning feature quite nicely, but there is a 
mismatch:
Under the 'Use fixed size memory' option, I can set the memory size and there 
is a checkbox 'Ballooning'.
I find this confusing. If I set a fixed amount of memory, then that seems to me 
to be mutually exclusive with 'Ballooning'.
Also, the online help does not show this checkbox at all, so I wonder if this 
is a glitch in the UI and should be grouped differently? Or is the online help 
not up to date?

Most importantly, is my assumption right that Use fixed size memory and 
Ballooning are mutually exclusive?

Thanks,

Martin



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